Quantcast
answersLogoWhite
notificationBell

Top Answer
User Avatar
Wiki User
Answered 2015-07-17 17:31:03

I had the same problem in my 99 firebird....check the engine module or it could be the coils mine was both along with a faulty catalytic converter..if you smell a rotten egg then its the cat... goodluck

Check the current at the fuel pump; fuel pump might be going.

TRY THE O2 SENSORS HAPPIN TO MY 1996 IMPALA TO BUT THE WIRES WERE CROSSED ON MINE

001
๐Ÿ™๐Ÿฟ
0
๐Ÿคจ
0
๐Ÿ˜ฎ
0
๐Ÿ˜‚
0
User Avatar

User Avatar
Wiki User
Answered 2014-12-11 22:57:22

P0300 Diagnostic Code - Random Misfire

Symptoms.
Engine may stumble or miss
Engine may be hard to start
you may notice no issues

Cause
Failing spark plugs or spark plug wires
Bad coil or coil pack
Failing oxygen sensor(s)
Bad fuel injector or more than one
Stuck exhaust valve
Bad catalytic converter
EGR valve or valve passage clogging
Bad camshaft position sensor
Bad PCM or ECM

The Fix
Best first action is a tune up, new plugs, wires, inspect all hoses and wire connections then reset the code. If it returns you will need to narrow it down to a system, coils and coil packs should be tested, catalytic converters for function ( do you smell rotten eggs?). A misfire that jumps cylinders could indicate a lean condition, do you have any other codes along with the 300? this will help clue you in to the source, check valve function to make sure they are opening and closing fully.
This is probably pone of the most difficult codes to troubleshoot, so start with the basics and work your way into the more expensive options, in many cases a good old tune up solves the problem, back it up with a fuel system cleaning and see where you stand.

001
๐Ÿ™๐Ÿฟ
0
๐Ÿคจ
0
๐Ÿ˜ฎ
0
๐Ÿ˜‚
0
User Avatar

Your Answer

Still Have Questions?

Related Questions

Does bad spark plugs give you low idle?

Doubtful. Bad spark plugs would give you a rough idle, hesitation and poor performance. And they may also give you a P0300 code for random misfire.


What are the signs of a sticky valve?

Code P0300, Intermittent rough idle,


What is causing my 1997 Chevy cavlier to idle rough. Why did scanner say cylinders 1 and 3 miss firing?

Well...the misfire on 1 and 3 would explain the rough idle. The misfire could be from worn plugs, wires, bad coil, or bad injectors.


What are Signs of Transmission problems of a 2005 impala?

If it is slipping in gear or any out of the ordinary rough shifting.


What causes a Park Avenue to run rough or misfire and stall at redlights?

Check the Park Avenue EGR valve for a clog. A clogged valve can cause a rough idle and stall at a light.


What do old spark plugs do to a car?

Old spark plugs can make a car misfire, run rough, and not fire at all.


1998 Grand Cherokee runs rough when gas is pressed?

Misfire? Due for a tune up? Check engine light on?


Why does your 90 Acura Integra idle rough?

Check idle adjustment (rpm) then check timing, then check for misfire-start there.


My 2000 chevy blazer is running rough and im getting a P0300 CODE on the computer whats the problem?

P0300 Diagnostic Code - Random MisfireSymptoms.Engine may stumble or missEngine may be hard to startyou may notice no issuesCauseFailing spark plugs or spark plug wiresBad coil or coil packFailing oxygen sensor(s)Bad fuel injector or more than oneStuck exhaust valveBad catalytic converterEGR valve or valve passage cloggingBad camshaft position sensorBad PCM or ECMThe FixBest first action is a tune up, new plugs, wires, inspect all hoses and wire connections then reset the code. If it returns you will need to narrow it down to a system, coils and coil packs should be tested, catalytic converters for function ( do you smell rotten eggs?). A misfire that jumps cylinders could indicate a lean condition, do you have any other codes along with the 300? this will help clue you in to the source, check valve function to make sure they are opening and closing fully.This is probably pone of the most difficult codes to troubleshoot, so start with the basics and work your way into the more expensive options, in many cases a good old tune up solves the problem, back it up with a fuel system cleaning and see where you stand.




What are signs of bad valves in your car?

Check engine light is on with a misfire code, rough idle, lack of power, low compression.


What type of antifreeze do you use for 2006 chevy impala lt?

If it is slipping in gear or any out of the ordinary rough shifting.....


Rough idle 1999 C280 codes P0300 and 0303?

P0300 Diagnostic Code - Random MisfirePo303 Diagnostic code - Misfire cylinder 3Symptoms.Engine may stumble or missEngine may be hard to startyou may notice no issuesCauseFailing spark plugs or spark plug wiresBad coil or coil packFailing oxygen sensor(s)Bad fuel injector or more than oneStuck exhaust valveBad catalytic converterEGR valve or valve passage cloggingBad camshaft position sensorBad PCM or ECMThe FixBest first action is a tune up, new plugs, wires, inspect all hoses and wire connections then reset the code. If it returns you will need to narrow it down to a system, coils and coil packs should be tested, catalytic converters for function ( do you smell rotten eggs?). A misfire that jumps cylinders could indicate a lean condition, do you have any other codes along with the 300? this will help clue you in to the source, check valve function to make sure they are opening and closing fully.This is probably pone of the most difficult codes to troubleshoot, so start with the basics and work your way into the more expensive options, in many cases a good old tune up solves the problem, back it up with a fuel system cleaning and see where you stand.


Engine light blinking running rough shaking when idling?

If your check engine light is blinking that means an ignition misfire has been detected


What is the problem for a Chevy Cobalt with the code P0303.?

0303 Cylinder 3 Misfire Detected Could be a bad plug or plug wire; or an injector problem. Is it running rough? If it sounds smooth, it could be a transient condition. Such as driving on rough roads or lugging the engine, however rough roads/lugging will unlikely set a misfire code with an automatic transmission. I'd give the light several days and see if it goes out. If it's running a bit rough and it's time for plugs and wires anyway you may go ahead and do replace them. Once it's running smoothly, the light will go out soon--three consecutive ignition cycles without a fault. The way it sets a misfire code is the computer checks the crank position sensor every 100 revolutions for any deceleration that a misfire would cause. If it discovers deceleration, it looks at the cam position sensor in order to identify the cylinder. Therefore the PCM may not detect a light misfire right away. If it detects a severe misfire, it will flash the MIL, since a severe misfire could damage the catalytic converter, and disable the lock up torque converter clutch momentarily to rule out the rough road possibility. Since this code is not set by an actual lack of spark, just unexpected engine deceleration, any action that jostles the engine will be read as a misfire.


Why can't we see an image on rough surfaces?

The rays of light from the object are reflected off rough surfaces in "random" directions and so do not form a coherent image.


Why does your jeep cut out at 2900 rpms and is idling rough and engine light is blinking?

Have it checked for codes. There will be a misfire code that will let you know what cylinder has the problem.


Why rough idle or possible misfire?

My car did the same thing So I hooked it up to a computer come to find out it was 2 oxygen sensors that went bad.


How do you know if you have a misfire?

My idle was running rough and slight loss of power (5 cylinder engine). The power loss is more noticeable on cars with less cylinders.


What does light do when it strikes a surface that is not smooth?

When light strikes a rough surface it reflects in essentially random directions.


Why don't balls bounce on rough surfaces?

A probable reason can be that when the surface is smooth , the normal vector is straight up and ball bounces . But when the surface is rough , it has random inclinations at different points and hence , different normal vactors act in random directions and cancel each other out.


Can you fix your car misfire by cleaning your car mass air flow meter?

Misfire is caused when a cylinder doesn't ignite its fuel mixture. Suspect a bad plug, coil, or wire. This will not be caused by a mass airflow sensor, that can cause a rough idle or bad fuel economy, but will not cause an individual cylinder to misfire. Driving with a continuous misfire condition will eventually destroy your catalytic converter. If your check engine light is flashing you are doing serious damage to your cat converter.


What is causing the rough idle on a 2006 Chevy Impala?

There are many things that can cause a rough idle on this car. The computer could be going out, the engine may not have enough oil, and the engine may not be getting enough fuel or electricity.


What happens when you drive with a bad fuel injector?

When you drive with a bad fuel injector, your engine will often misfire. You might also have a rough idle and increased fuel consumption.


Still have questions?

Trending Questions
What are fat burning foods? Asked By Wiki User
What is half of 16? Asked By Wiki User
Do potatoes have genders? Asked By Wiki User
Unanswered Questions