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Fuel and Engines

~4900 answered questions
Parent Category: Auto Parts and Repairs
We commonly relate fuel and engines with gasoline. Other engines also run on natural gas such as propane and “bio-fuels” such as ethanol. The principle remains the same as the fuel induces internal combustion.
you need to remove the steering wheel...then all the directional parts (unscrew the directional arm if it is an older style remove the screw holing in the key cylinder then lstart looking for 4 screws sometimes they ar hex others have torx then tighten them and reassemble in reverse ...if you have a…
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test the compression in all cylinder bores to rule out the valves or for novice home mech. take the cylinder head in to a machine shop to have a compression test done. A bent valve will be noisy, each time it is hit by the cam it will bang, the cylinder will not burn fuel and you may even have burn…
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Try blasting a little starting fluid into the thottle bore and then cranking it.   There is no reset switch but you will have to do some prayer meeting and maintenanec. After 2 years the gas has likely turned to shellac or therebouts. Get rid of the old gas.Emptying the tank a great place sta…
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%DETAILS% Answer No, it is not normal for a newer car to idle and shake rough. I have had the same problem with my car and all it required was a tune up and a change of the spark plugs. Answer I work for General Motors as a Licensed Mechanic. I encountered a sitution on numerous occass…
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I have a 95 Camaro as well with the same problem. My problem was that my cam was eating up my lifters, and then they tried to fix the problem, and adjusted the valves wrong -- thus causing the thumping noise.  If you hear it when first pulling out or turning from a stop, it could be loose or d…
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Revving a Car Engine Yes, revving the engine causes a few things to happen. If it's a cold engine, you can cause friction wear on the cylinder walls, piston rings, and pistons. It can cause excess gas to go into the exhaust and ignite in your catalitic converter. Gas ignition in your exhaust melts…
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Make up your own mind but here are 12 of the best opinions #1Sometimes it depends on how many miles there are on your vehicle. It can do some harm by removing too much. An old way I know and do myself is to add one quart of transmission fluid, drive around for an hour or so, then change the oil. It…
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If your oil looks watery and milky, you more than likely have a blown head. Get it checked -- you actually could do more damage to your car engine. Some cars also get a mositure build up in the oil that might be white or yellowish color if you don't get the engine warmed up all the way in the morni…
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Hi Dave,I have a 1989 Ford F150, 8 cyl. I had a similar problem where I would start my truck and it would die almost immediately. Anyway, I also replaced several things, but the thing that did it was the fuel pressure regulator. You don't say what type of car or truck you have. But it doesn't sound …
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Your question leaves a lot of unanswered questions. If "the engine thumps" each time you shift between drive and reverse, it could be a failing universal joint. This would definitely be more noticible (and damaging)when shifting at higher engine speed . you said that your engine was racing at ~2k r…
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1-Compression test. This tests the state of the 'bottom half' of the engine and the valves and seats. All cylinders should should be within 5 psi, and near the high end of spec. If your compression gauge is old or of poor quality or the vehicle battery is suspect, look only for equality between cyli…
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%REPLIES% Answer Yes, while the engine is running (in park) spray gumout/carb cleaner along the egdes of the intake. If the motor runs smoother or better then that tells you the intake is leaking. This, however, could cause a fire. A safer way is to use an unlighted propane torch. Turn the f…
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Bend over a little farther... doesn't that feel good to see the oil leaking leaking out of the valve cover? Probably not, but those are common for leaks, I think it may be a valve cover gasket. Get a neoprene one, not cork if you plan to change it your self. Could be leaking from anywhere back ther…
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Vacuum leak. Sensor going bad that will make a fuel adjustment that in not needed. It tells the computer to add fuel, when the computer does, other sensors say that there is too much fuel and tell the computer to back off, thus the idle fluctuation. Could be insufficent free play in your thrott…
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%DETAILS%%FOLLOWUPS% Why would you want to? It is computer controlled, so I don't see how you could.   Well, there are a couple of things I can think of. First, your low RPMs might be caused by a bad fuel/air mixture, which is often the O2 sensor which is around 50 - 100 dollars. Another t…
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Yes, it is horrible, especially if you have fuel injectors. I drive a 99 Cadillac STS and I ran out of gas and my car stopped running. I put gas in it, but that wasn't enough so I thought maybe I needed a jump. But basically I messed up my fuel injectors and couldn't get my car started. The bill : …
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Why a Car Would Turn Over But Not Start Lay answer: in addition to the battery voltage to "turn the engine over"...ignition requires spark and gas. I'm having the same problem with our 86 Volvo. The mechanic says the spark plugs are providing the spark...but fuel isn't getting to the cyliders. It's …
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%DETAILS% Answer Start of with the maintenance items: Tune up parts-cap, rotor, plugs, fuel filter, air filter, pcv, wires. The plug condition may help clue what is going on. Clean Throttle plates and intake valves
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  First, consider getting yourself a factory service manual for your vehicle as it often has the correct troubleshooting information for your vehicle. It really comes very handy when the car starts having problems. What is the temp gauge reading? Does it overheat? Sweet smelling smoke out of t…
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If the rpms are above normal the most likely problem is a vacuum leak at the intake side of the engine. This condition will also typically cause a rough running situation at idle. Another thing that could cause a car to rev up and shake is a bad ecc(computer).   also check your motor mounts…
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Check your oil,- is it foamy? Examine your coolant. Does it smell like oil? Is the smoke sweet smelling? Knocking has nothing to do with a head gasket, sounds like you have multiple engine issues to me. And finally...if changing a head gasket is simple, why does it cost so much? because if you d…
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Here are the best 10 answers 1 My P0300 code has been determined to be caused by low compression in 2 cylinders: due to burnt valves.  2 I had this same problem. I ended up having a new cat put on along with an engine modual and 3 coils!!! It is a lot cheaper to take it the shop trust me!!! I…
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%DETAILS% Answer I'm no mechanic, but from what I've read in my Hayne's Repair Manual, a complete engine overhaul involves replacing piston rings, reboring or honning cylinder walls, replacing pistons (if the cylinders are rebored), replacing main and connecting rod bearings, regriding the cran…
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Get a good straight edge and some feeler gauges. Lay them across the surface of the head in all orientations. (across front/back/middle, diagnally across corner to corners) See if the feeler gauges will slip under at the end or the middle of the straight edge. (or you can see light...)If so, it's wa…
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Close one hole of your nose and try to breath in. Feel any difference. Coming back to the subject. By increasing the # of valves you get the below features. a) better combustion chamber shape, resulting in better combustion, resulting in better power and fuel economy.   There are intake valve…
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Signs of a poorly tuned engine: lack of power, poor idle, hard to start when cold or hot, poor gas mileage, or engine 'just doesn't feel right".Damage? Depends on what they did, but usually it's more of an inconvience than anything else. Of course if left unchecked for a long period of time... that'…
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Answer Honestly yes. it can cause major problems and all together it could cause your engine to blow. so id change them they arent that hard.
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%DETAILS% Answer there should be a cubic inch size that is stamped on the side of the block. you may have to jack it up and look from under neith..it should be right in front of or behind the motormount...as far as the tranny i have no idea if you cant find the cu.in. on the block there should…
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I use only one, Lucas oil stabilizer, because I only require one thing from it. I had a serious issue with motor oil break down on the many diesel engines I had on the equipment I serviced. At oil change time it would run out like water from the drain plug, I also noticed this in my own vehicles, t…
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Answer In my case just by installing a new head gasket was enought bucause if air is seeping it will reflect with that diagnose There is an air leak somewhere between the throttle plate and the intake valves. What's happening is this: your car is designed to run on a perfect "stoichiometric" ratio …
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The PCV valve is located on top of the engine, just right of the intake manifold. One end is pushed in the hose that comes out of the top of the valve cover, the other end goes to a short length tube connected to the throttle throat.
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%DETAILS% Answer Hey Kenneth==It is a pretty involved procedure. Get a manual on your car from either a local parts store or MOTORLIT.COM. Good luck Joe
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The most likely cause is a stopped up fuel filter. Replace it and if that doesn't do it, check the fuel pump preasure. If ok, it could be a stopped up cat convertor.
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Putting diesel in a gasoline powered engine is less damaging than putting gasoline in a diesel. Depending on the amount of diesel and how long it took to find out it was in there, either after running or just after filling up and not attempting to start and noticing. Obviously if vehicle wasn't star…
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%REPLIES% Answer First of all, if your welding on a gas tank while it still in the car I would think that the undercoating is going to be the LEAST of your worries. I dont know who told you that you could weld that up but they have lost their minds. Dont do that without taking the gas tank out …
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Sounds like a fuel filter/fuel pump issue....I'm having a similar problem with my 1990 Grand Prix SE. Was hoping to find the location of the pump and filter, as they aren't even mentioned in the owner's manual!!! I'd prefer to do the repairs myself...another site said replacement of the filter was q…
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Hey Michelle==My son had a rodeo and the lifters which are incorperated in the rocker arms would make noise every so often. He would get some GUNK engine flush and follow directions and it would stay gone for another good while. He changed his oil every 3000 miles. And changed the timing belt every…
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A car backfires because unburned fuel is getting to the muffler. The heat of the exhause system causes the fuel to combust, thus a backfire.   I have just been told that the rubber on my exhaust has split - could this be why the car would backfire?I have heard something about air getting into…
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most likely it is the engine temp. sensor that tells the fan the motor is hot if it is going bad then it can make the fan run non stop I have the same problem in mazda6 2004 2.3l engine. If you have $100 you go to the dealer and get the update for compute unit, it is a bug in it. If you do no…
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%DETAILS% Answer just try a tune up, new spark plugs air filter,and an oil change. also check the fule syetem pump, and filter. the engine stalls because its not gerrin enougf gas or air into the cylinders. Answer some f*@#*&*# genius you are. where did you get that answer straight from…
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%DETAILS% Trade it in for a Vette or something...   You dont. And the 89' skylark gets WAY more than 7 miles to the gallon. I get about 20-23 in the city and 32 on the highway.
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1st you have to repalce the timing chaing and gears. Then, you can set the timing correctly.
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%DETAILS% Answer Number 1 cylinder is..... if you're facing the front of the vehicle the number 1 cylinder is the cylinder furthest to the left or passenger side of the vehicle or the side of the engine that has the belts... the 2.2 ltr. L-4 engine and almost all other "transversly mounted" eng…
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Hey Starr===It varies from one part of the country to the other. It is probably an hourly charge and in Calif it can be from $150 an hour to somewhere in the central us which would be about $50 an hour. THESE ARE JUST GUESSES. GoodluckJoe
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Hey Joseph==If you are really interested in changing the engine, go to the parts store and get a manual on your car. It will tell you how. GoodluckJoe
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just add a super charger and you are there. check with somebody like jegs.com
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Hey Roger===If you stated the kind of car and engine you had it would be easier. Just guessing, it is either the cable to the throtle body or carb hanging or the idle solonoid needing cleaning. GoodluckJoeA sizable vacuum leak could also do that.
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%REPLIES% Answer Usually some carbon deposits are left clinging to the combustion chamber surfaces, these deposits are red hot and ignite fuel/air mixture after the ignition is turned off. This could be caused by letting the vehicle idle excessivly long or only using it for short low speed tr…
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Chevy Tahoe Heater Return Pipe Hey GMMerlin, I have a leak coming from that threaded fitting for the heater hose. Can this be fixed simply by retightening the fitting or do I need to buy a new one?You will have to replace it...most likely when you touch it, it will break and leave the threaded part …
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It can be a leaking injector that floods the engine when it isn't running. GoodluckJoeThey asked about a problem that occurs AFTER it's been running a while...not after it's been sitting, with a pressurized Fuel line.
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HeySteve==It should be in the center under the dash. GoodluckJoe next to the hood release short last 2 pins turn ignition on engine off will flash once then twice ( code 12) three times then error codes
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It depends on the engine size, number of valves in the head, and difficulty of head removal. Typical repair procedure is to remove the head, replace all the valves and valve seals. This ensures the best and most dependable repair. I would guess it will run you anywhere between $600.00-$750.00 for a …
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usually late ignition timing could cause this or an excessive amount of fuel in the exhaust system. backfire can be caused by choke not shutting off completely, also could have a bad distributor cap, bad spark plugs, bad ignition condensor, bad plug leads, or to much fuel getting to carburetor sys…
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%DETAILS% Answer Hey Heather==What is the bucket you speak of? Possibly it is the coolant recovery jar. Check all of the hoses and if it isn't leaking from the hoses and is shooting up out of the recovery jar you probably have blown head gasket. goodluckJoe
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The following may be possible causes of the problem: incorrect idle speed, clogged fuel filter, damaged or damp distributor components, faulty spark plug wires, or faulty emission system, among others. Consult your user's manual for more clarification.
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It is a filtered opening in one of the valve covers and allows the PCV to draw filtered air through the crankcase. Engine Breather Systems Inside an engine internal pressure is produced within the crankcase. This pressure is generally caused by a small leakage of combustion gasses past the piston ri…
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according to my service manual, the manifold vaccum should be like this: Intake Manifold Vacuum (no load) --- 51 - 21hg at idle Air Inlet restriction (no load) Between air filter and Throttle body 20hg at 4000rpm. 51 - 21hg roughly relates to 25 -10 psi I also found this: Crankcase Pressure/va…
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First off where is it? If it is in line then you can cut that section off and replace it with rubber fuel line of equal size.
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5W30 is a viscosity rating, In simple terms resistance to flow. 10W40 is a thicker oil in extreem winter climate you could experience hard stating.If you use a synthetic or partially sythetic oil you will be better off. i tried it in my 95 Monte Carlo 99,000 miles.it triggered service engine lig…
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It is a big job. If you attempt it, get a manual from AUTOBOOKSONLINE.COM
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It probably needs a tune up. The two main problems that cause this are that either the spark plugs are fouled and need to be replaced, or the bearings in the A/C compressor need to be replaced. Obviously the spark plug option is the least expensive. Isuzu recommends that you use Nippondenso plugs bu…
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There are emergence repair kits but I would suggest replacing ot for safety sake.
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It can easily handle up to 10 psi without modifications. We have seen them take quite a bit more more than that but it then becomes a question of reliability, especially for a dailey driver. As boost levels go higher, forged internals are recommended, similar to the L62s.
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Cross-firing due to bad sparkplug wires (if so equipped), a bad distributor cap (if so equipped), too lean a mixture causing pre-ignition, vacuum leaks, too much spark-advance causing pre-ignition, overheating, insufficient octane in the fuel (if high-compression 350).
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Noises have to be heard to correctly diagnoise. TAke it to a garage. But a good place to look for a noise when the driveline is under torque ( accel and turning) would be the CV axles.
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%DETAILS% Answer This engine was famous for stripping the timing gear. It probably needs a new one but not easy to replace since you have to pull the camshaft to press the gear on.
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IT SHOULD WEIGH APROX 300-350 LBS
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Agree - lots of work for only 0.3L of displacement. Try these: iridium plgs from ngk (both help my mpg), get a better air intake, check and post to the npora boards for performance mods. What is your goal?? : I disagree, unless you have no previous engine experience. The 3.3 is near the exact same…
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Let's see........ 1. Bent valves 2. Caved pistons 3. Burned spark plugs......need I go on? DON'T DO ITYou can run a higher octane in your engine if you like without worry about doing damage; except to your wallet. If you WANT to "bend valves" and "dish pistons" Camp Stove fuel will do a great job…
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Your best bet is to buy the manual. There are multiple ways of adjusting rockers and it depends on the vehicle. Your loose rocker arm may also be an indication of a bent push rod, bent valve, or worn out cam.there are 2 types of rocker arm studs pressed in and threaded in. if it is pressed i suggest…
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If the rings are completely worn out they can put more preasure in the crankcase than the pcv can handle. Have it checked out.
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You need to find out if the fire or fuel quits and go from there If your Subie is a newer model (mine is 2015) you have to unlock it with the remote-equipped key, and start it with the same key. Otherwise you can run into the "engine immobilizer" that kicks in if you are not using the correct key …
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very easy, go under the truck, take off both nuts for the mounts, go up top and remve 2 more nuts, 1 per side. jack up motor, and ta da ! presto chango.
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well for starters I'm assuming you ran the scan test with a ford scanner to get these codes. If so then........Code 173 means:Heated Exhaust Gas Oxygen (HEGO) sensor- voltage signal indicates "rich" (Bank 1 ).But....if you had a scanner then you should have the code book along with it right?As for t…
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%DETAILS% Answer have the Fuel injectors checked out.
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if the line is leaking with a hack saw cut a gap out of the line after you removed the gas cap to release pressure in the system.replace the gap with ta small piece of water hose and two hose clamps.this is only a temporary fix that can last for years.it is best to replace the the entire line i have…
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Go to www.autozone.com and click on repair info and enter in car info and then click on repair manuals and a manual for your vehicle will come up and it should be listed in that manual. Sometimes the diagram is on the hood of the vehichle rather than on the engine compartment but you probably alrea…
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you have to adjust the Idle position sensor on the throtle body,it has two small cap screws ,you loosen them and turn the sensor and tighten the screws when you reach the idle speed you want.the motor should be warm so you'll get the idle you want.make shure it's not to slow or the engine will die w…
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You can't repair them...only replace them. Any auto parts store can get them and they're not too expensive.
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The tank has no drain, the diesel must be pumped out. Find the relay in the engine fuse box "circuit opening" and remove it, it has 4 prongs, use a wire to jump the recievers of the 2 large prongs in the box. go under the van by the front of the tank, remove the plastic splash guard, disconnect …
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You can find an exploded view of the 1996 Mazda Millenia 2.5 liter engine at most Mazda dealerships. You can also find the exploded view in most Mazda service manuals.
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Read the directions on the back of the container. Usually it is one can for every full tank of gas.
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depends is it automatic or manual? if its automatic its more than likely that your transmission isn't shifting into first gear
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Answer Those are the lifters that are making the noise. It won't hurt the car, it's just annoying. Mine does it. Answer Yo Can just seafoam it, alot of times its actually a build up of carbon in the valves and combustion chamber, and the noise just gets echoed by the lifters and valvetrain …
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%REPLIES% Answer You need to go to a car parts store, and get a repair manual for your car. They cost about $16.00 Or, go to a Public Library. Answer Thank You very much. I have actually tried those very two places. I can tell you how many auto parts stores in countless cities I ha…
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%REPLIES% Answer Your engine is burning oil. The usual causes are worn out valve guides and seals, broken piston rings, worn rings and scored cylinders which all amounts to an engine overhaul. Answer If you have a turbo charger on your vehicle, it may have gone bad.
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you dont have to remove it totally. just undo the engine mount bolts raise the engine up just enough to get to the bolts that are usually hidden under the crossmember. must use a cherry picker to lift engine. make sure not to lift to high or you will break the exhaust.
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Buy one of the "flush in a can" products and follow the directions exactly.if you want to do a machine flush your dodge dealer should be able to help you out. it wont be cheap, expect to pay between $100 and $150 for the flush and an oil change.
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You would have to have a coupler made to connect one crankshaft to the other. Then you would have to find out at what degrees the crankshafts should be for a smooth operation. Of course, they would still have separate ignition and fuel systems. You would also have to make sure that engine #2 (whose…
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Lock and Block rear wheels, Remove frame nut to both motor mounts, *Remove transmission nuts (so transmission doesn't bind) Remove engine bolts - this may or may not be easier with a breaker bar and the wheel removed, try penetrating oil and let sit for a while if it's very tight. Now either li…
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YES DEFINATLY, THE EASYEST WOULD BE THE 4.3L DIESEL FROM A RWD GM PRODUCT. ONE DETAIL TOO LOOK OUT FOR WHEN CONVERTING TO DIESEL MAKE SURE TOU REMOVE THE RESTRICER PLUG FROM THE FUEL RETURN LINE USUALLY IT IS IN THE PIPE AT THE TANK FLANGE.
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%REPLIES% Answer Timing is controlled by the PCM, and is not adjustable. You might have a problem with either a plugged gas filter, egr system malfunctioning, or induction problem (leaking tube going from the MAF/MAP to the throttle body. Also check the PCV valve. Answer In addition, carbon…
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%REPLIES% Answer Depending on how many were added, there is a chance of fuel lines/filter getting clogged. Other than that, you wouldn't have any problems. Answer A one time occurence shouldn't be that bad. I would run the tank empty, refill with clean gas AND change my crankcase oil. Mot…
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Check three things: Fuel pump relay, and fuel pump inertia cut off safety device if equiped. check for 12 volts at the fuel pump to rule out faulty connector or wiring.Plus you need to check if the fuel injector if stuck open and also the fuel pressure regulator.this is on a 2000 kia sportage and no…
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No engine damage. The problem is that the spark plugs won't ignite the diesel fuel. If you can drain all of the fuel lines, most of the tank and fill back up with gas and clean or replace plugs, then it will probably start right up. Back in the 50's, some gasoline tractor engines would start on …
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%DETAILS% this answer is out of the haynes code book. code 35 idle air control valve or cicuit. Or idle speed control switch or circuit(shorted). good luck   One tip on the Idle Air system on GM's - some need to have a special reset on that part to clear the code. On the 1980-1990's GM's t…
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