DavidBaustert Posted January 20, 2015 Report Share Posted January 20, 2015 I'm at my wits end with this thing. P0301 code - misfire cylinder 1 Replaced all 4 plugs Checked Spark in all 4 Cylinders with inline spark tester, all OK Checked Compression in all 4 Cylinders - 210psi across the board Swapped cylinder #1 fuel injector with #2, then #3, still P0301 Swapped coils around (Waste Spark ignition), still P0301. Put a noid light on all 4 injector plugs, all OK I don't know what else to check. Cylinder 1 plug looks like its wet, no carbon from firing, so I believe it's ignition related, but not sure what else to check. Any help is appreciated. Quote Link to comment Share on other sites More sharing options...
Green Bastard Posted January 21, 2015 Report Share Posted January 21, 2015 Ignition control module? Not sure that is what it is called, but what the wiring harness plugs into at the end of the cam tower cover thing (idi cover I think its called). Quote Link to comment Share on other sites More sharing options...
DavidBaustert Posted January 21, 2015 Author Report Share Posted January 21, 2015 Ignition control module? Not sure that is what it is called, but what the wiring harness plugs into at the end of the cam tower cover thing (idi cover I think its called). I figured spark test on all 4 would eliminate this? Any way to test it? Quote Link to comment Share on other sites More sharing options...
Geeesammy Posted January 21, 2015 Report Share Posted January 21, 2015 wait until Cordell chimes in before you go testing 20 different things. He will likely have a damn good idea what is next. Quote Link to comment Share on other sites More sharing options...
Green Bastard Posted January 21, 2015 Report Share Posted January 21, 2015 No idea how to test it, it was just a thought though premature I believe. The more I think about how the ignition on those cars work, the more I realise it would be 2 cylinders misfiring if this was the issue (though I wouldn't rule it out completely yet). Try swapping the spark plug boots around and see if it follows that. Quote Link to comment Share on other sites More sharing options...
Cordell Posted January 21, 2015 Report Share Posted January 21, 2015 Did you have really weak spark on that cylinder? I'd bet you do, it really needs checked with a spark tester that'll jump a gap to see how strong it is, because one that simply lights up won't help much. If there is no carbon tracking anywhere, you should be able to take the plastic bullshit apart and swap coils, see if it moves then. Testing the ignition on one of those is a PITA, but a coil sounds like a possiblity the way you described it. Quote Link to comment Share on other sites More sharing options...
DavidBaustert Posted January 21, 2015 Author Report Share Posted January 21, 2015 Did you have really weak spark on that cylinder? I'd bet you do, it really needs checked with a spark tester that'll jump a gap to see how strong it is, because one that simply lights up won't help much. If there is no carbon tracking anywhere, you should be able to take the plastic bullshit apart and swap coils, see if it moves then. Testing the ignition on one of those is a PITA, but a coil sounds like a possibility the way you described it. I've swapped coils already, no change. I'm going to pick up a different spark tester tonight (for gap jump like this one http://www.oreillyauto.com/site/c/detail/LIS0/50850/N0665.oap?ck=Search_N0665_-1_2182&pt=N0665&ppt=C0103) and check it again. I read that the plastic housing can become a conductor and the spark will jump through it arcing to ground. Any experience with this? I pulled the whole coil assembly out and put an old set of plugs in it, grounded them, and cranked with the fuel pump relay unhooked and all plugs were sparking. I don't see any carbon tracking on the boots, but there may be some on the plastic thing, not entirely sure but it looks like a black spider web almost burnt into the plastic? Quote Link to comment Share on other sites More sharing options...
Cordell Posted January 21, 2015 Report Share Posted January 21, 2015 I've swapped coils already, no change. I'm going to pick up a different spark tester tonight (for gap jump like this one http://www.oreillyauto.com/site/c/detail/LIS0/50850/N0665.oap?ck=Search_N0665_-1_2182&pt=N0665&ppt=C0103) and check it again. I read that the plastic housing can become a conductor and the spark will jump through it arcing to ground. Any experience with this? I pulled the whole coil assembly out and put an old set of plugs in it, grounded them, and cranked with the fuel pump relay unhooked and all plugs were sparking. I don't see any carbon tracking on the boots, but there may be some on the plastic thing, not entirely sure but it looks like a black spider web almost burnt into the plastic? yeah if that white plastic spark delivery piece of shit isn't nice clean and white replace it. That part is what I was refering to with carbon tracking. Quote Link to comment Share on other sites More sharing options...
DavidBaustert Posted January 21, 2015 Author Report Share Posted January 21, 2015 Ill pick one up tonight and give it a shot Quote Link to comment Share on other sites More sharing options...
Rocky31186 Posted January 21, 2015 Report Share Posted January 21, 2015 Coil housing needs replaced, seen it a bunch of times. Quote Link to comment Share on other sites More sharing options...
DavidBaustert Posted January 22, 2015 Author Report Share Posted January 22, 2015 "That white plastic spark delivery piece of shit" was the problem. Runs like a charm. Thanks everyone for your help. Quote Link to comment Share on other sites More sharing options...
Cordell Posted January 22, 2015 Report Share Posted January 22, 2015 "That white plastic spark delivery piece of shit" was the problem. Runs like a charm. Thanks everyone for your help. :thumbup: Quote Link to comment Share on other sites More sharing options...
Rocky31186 Posted January 22, 2015 Report Share Posted January 22, 2015 "That white plastic spark delivery piece of shit" was the problem. Runs like a charm. Thanks everyone for your help. Such a bad design, they seem to go bad more when it gets cold I've noticed. Quote Link to comment Share on other sites More sharing options...
DavidBaustert Posted January 23, 2015 Author Report Share Posted January 23, 2015 Such a bad design, they seem to go bad more when it gets cold I've noticed. When it started misfiring, i was stuck coming out of my drive (icy up hill gravel drive) and traction control started kicking in. MIL lamp started flashing and I didn't think anything of it (throws a gas cap code 3-6x a year). When i pulled into my spot at work, I noticed it was running real rough. All of this on the coldest day of the year so far. The plastic thing I bought from oreily has a lifetime warranty, so if it happens again, I'll be sure to swap it out first. Quote Link to comment Share on other sites More sharing options...
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