engine code p0300 random misfire
#1
engine code p0300 random misfire
hey ive been dealing with this issue for a long time now ive tried everything nothing i do will make it go away here is what ive done
changed plugs,wire,coils, coil module, checked fuel presssure check compression
it starts no probems but at idle my rmps jump around and when i wanna go no power
any info would help thank you
changed plugs,wire,coils, coil module, checked fuel presssure check compression
it starts no probems but at idle my rmps jump around and when i wanna go no power
any info would help thank you
Last edited by moondawg; December 8th, 2013 at 11:40 PM.
#2
got the same problem on my 2004 Cavalier Bi-Fuel rig
030x codes (TRAC OFF light comes on too)
Found the following:
2004 Chevy Cavalier 2.2l is misfiring at idle speed - Fixya
030x codes (TRAC OFF light comes on too)
Found the following:
2004 Chevy Cavalier 2.2l is misfiring at idle speed - Fixya
#3
Site Ambassador
Some of the things you wasted your money on would have tripped a cylinder specific code by the way, not a random. My daughter used to have a 97 Crapalier that had a P0300 code. Checked the stuff you replaced, then tried running the engine while unplugging one fuel injector at a time. Had one injector that made no difference, so I replaced it. Turns out it's a bad idea to replace just one injector with an aftermarket one, since they don't necessarily flow the same as a factory one, and the new one made the engine run worse. So, I soaked and swished the old injector in carb cleaner, put it back in place of the new one, and the engine ran like a champ. Also found that running through a couple tanks of gas with injector cleaner did diddly squat.
#4
hey ive been dealing with this issue for a long time now ive tried everything nothing i do will make it go away here is what ive done
changed plugs,wire,coils, coil module, checked fuel presssure check compression
it starts no probems but at idle my rmps jump around and when i wanna go no power
any info would help thank you
changed plugs,wire,coils, coil module, checked fuel presssure check compression
it starts no probems but at idle my rmps jump around and when i wanna go no power
any info would help thank you
#5
Some of the things you wasted your money on would have tripped a cylinder specific code by the way, not a random. My daughter used to have a 97 Crapalier that had a P0300 code. Checked the stuff you replaced, then tried running the engine while unplugging one fuel injector at a time. Had one injector that made no difference, so I replaced it. Turns out it's a bad idea to replace just one injector with an aftermarket one, since they don't necessarily flow the same as a factory one, and the new one made the engine run worse. So, I soaked and swished the old injector in carb cleaner, put it back in place of the new one, and the engine ran like a champ. Also found that running through a couple tanks of gas with injector cleaner did diddly squat.
Last edited by eggenet; January 5th, 2014 at 11:17 AM.
#7
Site Ambassador
Glad you got it figured out though!
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#8
Question what would typically go defective 1st the coils or the module.
#9
Changed the coil pack again and the car is running like new again. Hope this coil pack will last longer then the last one. Fingers crossed.
Last edited by eggenet; January 23rd, 2014 at 9:34 AM.
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