-Bradders- Posted August 6, 2014 Share Posted August 6, 2014 Can anyone please list for me if you dont mind, every poasible cause of a misfire? Just noticed mines missing only every now and again not constant. As you know it idles quite alot lower than it should say around 650rpm. Thanks. Quote Link to comment Share on other sites More sharing options...
GMballistic Posted August 6, 2014 Share Posted August 6, 2014 Just one possible cause I can suggest ~ I had a misfire (which eventually caused the EML to come on) it was down to a faulty coil pack. Got a second hand coil pack from zmanalex, traced the faulty one and replaced. Cleared the code and all was good again. Quote Link to comment Share on other sites More sharing options...
Ekona Posted August 6, 2014 Share Posted August 6, 2014 Why don't you tell us what you've tried, before we list every single possible cause of a misfire ever? It would make life a lot easier! Also, you need to sort the low idle out first IMHO. Quote Link to comment Share on other sites More sharing options...
-Bradders- Posted August 7, 2014 Author Share Posted August 7, 2014 Yeah ive not tried anything. I literally noticed it 10 minutes before posting. Thing is it drives perfect its only when on idle. I put the diagnostics on it. No fault codes but the tp% was only 0.4 and didnt move when revving.. Im guessing thats not right? Quote Link to comment Share on other sites More sharing options...
370Ad Posted August 7, 2014 Share Posted August 7, 2014 650 isn't that low is it? My 70 is around that. Low idle can be caused by build up near the butterfly valve. Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted August 7, 2014 Share Posted August 7, 2014 650rpm +-50 is the correct idle speed, and most of the DE engine i have seen have a slight uneven/miss on idle, i think its a case of some people notice it some don't. However the TPS doesn't sound right, how was it measured, and is the measurement reliable? Quote Link to comment Share on other sites More sharing options...
-Bradders- Posted August 7, 2014 Author Share Posted August 7, 2014 Was measured on the diagnostic (snap on) machine, maybe i need to remove it and give it a clean! Quote Link to comment Share on other sites More sharing options...
mouthwash Posted August 7, 2014 Share Posted August 7, 2014 More bad luck Bradders, seriously? You're due the jackpot soon surely. 1 Quote Link to comment Share on other sites More sharing options...
-Bradders- Posted August 7, 2014 Author Share Posted August 7, 2014 More bad luck Bradders, seriously? You're due the jackpot soon surely. tbf, its not too bad, and to be 100% honest it may have been there from day 1, just last night i noticed it more as it was making the flywheel chatter when it missed. Quote Link to comment Share on other sites More sharing options...
bamdc2 Posted August 7, 2014 Share Posted August 7, 2014 Although I havent experienced a mis fire before, the DE when hot and on idel does sometimes pop and revs fluctuate slightly when it does this. Is that what your experiencing? 1 Quote Link to comment Share on other sites More sharing options...
-Bradders- Posted August 7, 2014 Author Share Posted August 7, 2014 Although I havent experienced a mis fire before, the DE when hot and on idel does sometimes pop and revs fluctuate slightly when it does this. Is that what your experiencing? Probably lol! Quote Link to comment Share on other sites More sharing options...
mouthwash Posted August 7, 2014 Share Posted August 7, 2014 You're not being that much of a doughnut are you? Quote Link to comment Share on other sites More sharing options...
-Bradders- Posted August 7, 2014 Author Share Posted August 7, 2014 Nah but it's never sounded like it did last night, was a bit put put blurgh, lol Quote Link to comment Share on other sites More sharing options...
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