Time for a compression test. Mark the spark plug wires so that you'll know where to put them back. Pull all plugs, screw in a compression gauge and have an assistant crank the engine with the accellerator full open. Let the engine crank until you hear the compression hit the gauge at least 3 times, then stop and look at the pressure reading on the gauge. Record the reading for each gauge. If one or more gauge is significantly below the others, you probably have a burned exhaust valve, the most common cause of low compression in one cylinder.
Check and clean spark plugs distributer and rotor change air fillter and oil change wont hert
Were are the freeze plugs
If your Chevy 350 marine engine misses at high speed, you might have an issue with the timing. This can be adjusted. You also may have an issue with the fuel filter or injectors. Spark plugs can do that also.
check your egr that is not plugged also do you have any engine codes?
Assuming the plugs and wires have already been replaced you may have a bad fuel injector.
check that your sparkplugs are not cracked and that your wires are fully on your plugs
the problem will be one or more coils and plugs needs replacing
A 2000 Silverado 5.3 Vortec that is hard to start and misses on one side of the engine might have a problem with the coil pack or the spark plugs. It could also mean that the block is cracked if the engine is prone to overheating.
There are seals under the valve cover that need replaced to repair oil on the spark plugs.
depends on age. Its pre 97 change the plugs for the bosch type 3 prong. And add some engine additive.
Never put Bosch spark plugs into a US engine. Normally they fail. Use Motorcraft--good experience speaking!
i have replaced the plugs and wires and my service engine light comes again in 2004 land rover discovery
First things first. What year, make, model, engine, and mileage? When were the spark plugs last replaced? Short answer: Yes. They should be replaced as part of the major engine overhaul your car needs. There should never be any oil on the spark plugs. A little carbon buildup, perhaps, but no oil. That indicates a serious engine proble such as worn out piston rings, worn out valves and guides, or a worn out turbocharger seal.
Generally speaking, when an engine "misses" (fails to fire on all cylinders,) there is a failure in the ignition system. Since most factory ignition systems lose power at higher RPMs, flaws in the wiring or spark plugs will become aparent. Given the age of your car, replcement of the plugs and wires will probably solve the problem. Note: If you note excessive dirt or grease on the spark plugs when you remove them, the problem may be minor oil leak in the engine. If these are not fixed, the problem will return when the new plugs foul up.
Ive never heard of draining coolant plugs except on a diesel engine . Once you drain the coolant and flush the system it should be fine
what year and what engine??
When you replaced the plugs, did you check the compression? Did any of the plugs look different than the others? Low compression in one cylinder can cause misfiring. But then, so can a faulty distributor cap.
You might want to replace ignition calbles too.
Wires from distributor can age and loose conductivity, especially under high voltage of full-thottle acceleration.
The easiest way is to look for spark plugs. No plugs and it is a diesel, plugs and it is a petrol engine.
did you gap your plugs right!!
There better be. I just spent a little over $40.00 getting them replaced.
form_title=Spark Plug Replacement form_header=Keep your engine running smoothly with new spark plugs! If you need your spark plugs replaced, we can help you find an auto technician to get the job done. What is the year, make and model of your vehicle?=_ When was the last time you had your spark plugs replaced?=_ Describe the problem=_
Freeze plugs are located on the sides of the engine block to allow for the expansion of the coolant if it should freeze. Without them the engine block could crack. They do not normally have to be replaced unless they begin to leak from corrosion or external damage.
You can replace all of them BUT the 2 in the rear of the engine block with out pulling the engine. To remove the rear ones you can either pull the transmission are remove the engine your choice.