Today while sitting in traffic I notice the car was vibrating alot at idle, I rev it and sure enough it's missing on a cylinder I plug in my OBDII scanner and it tells me I have a P0302 cyl#2 misfire and P0300 misfire. There's no smoke at all coming from the exhaust and there are no metallic sounds coming from the motor at all (thank God). I have a UTEC w/ map sensor, TN reflash on the stock ecu, Daetschwerks 650cc injectors and NGK Iridium one-step colder plugs. I really hope it's just a spark issue, but if it's an injector that's not horrible either. I bought the Daetschwerks and had them installed at PF last June so hopefully JT can take care of me on that if that's the culprit.

So I'm posting this to see if anyone has any suggestions as to what else it could be or what else I could check. Thanks in advance...

 

Check all your elec. wires/connections,or a coil could have gone bad. Take the plug out and check it first. Replace and reinstall. If it's still doing it then it's prob the coil pack.

 

I need to borrow a spare coil pack, but good idea Matt

 

I gave my last one to JT a couple weeks ago

 

just move the coil packs around keep up where you put them so you will know which one is bad.

 

My car did this about a month or two back. I never had any hesitation or wierd sounds. But I threw the same codes. I just had the codes cleared and everything was fine. Hope everything is ok Danny. GL

 

Is it a continuous miss....like the engine permanently sounds/feels like its running on 5 cylinders? Or just a shake here and there.

 

just unplug the the coil in the front driver side of the engine and see what happens.


then you can go from there. it should be an easy fix any way you look at it...

 

I cleared the codes but the misfire was still there. Thanks Jordan
It's constant
Yeah I figure it should be an easy fix, I'll keep ya updated thanks J I'll work on it tomorrow after work and see what I find.

 

Good luck.. Hopefully its a bad plug or coil..... Easy fix/DIY..

 

I had an issue with no 6 cylinder and it turned out to be a bad coil

 

im currently having a problem with p 0305 cyl 5 will report when its not so cold and i fix it

 

Well I picked up a used coil pack today, I'll update later, thanks guys

 

I agree its likely a bad coil but could also be a toasted plug on that cylinder too. Might want to pick up an extra plug just in case...

 

Turns out it was just a bad coil I pulled the plug just to look at it though and it looked good, just a bit moist from fuel, no biggie. Put everything back together and it started and purred to idle, what a relief Thanks again!

 

good to hear

 

Good news man...

 

whew!!!!! glad to hear its ok danny

 

That was easy!

 

I have greddy twins, and i have a p0306 cyl misfire, and we moved the coil to another part but the p0306 code still came up so it's cyl 6. What else could be wrong....we clear it, and it goes away, but once you drive it with out throwing it into boost the CEL comes on again, and it once again says p0306. anyone help.... i currently installed rc 650cc injectors, and switched out my e-manage blue with a utec. thinking it could be the ECU. well that was wrong.

HELP!!!