Misfires and plug gapping....

Shano · 10-25-2005, 10:00 AM

I'm gettting misfire codes on my car, originally only Cylinder 6, I replaced the coilpack, now I'm getting misfires on in cyl 2 and 4. The offending cylinders have carbon trails running up the plugs to the coilpack boots, Mechanic thinks the boots need to be replaced, he feels they are fitting to lose.

I was wondering if this could be blow by, the plugs I'm running are Denso Ik22's, gapped at .038, I stfa and I did see .032 and .028 listed as gaps, so is it possible that the gapping on my plugs are creating this?

E Vader · 10-25-2005, 10:10 AM

I have had a few friends with the same issue. Try raising the idle by 40rpm in the interum.

Are your plugs side gapped or end gapped?

I have triple side gapped at .036 and no misfires. I had some intemittant issues with missfires awhile back.

Shano · 10-25-2005, 10:28 AM

As long as I stay under approxiametly 1/4 throttle or less is ok, but as soon as I apply the throttle even moderately the car starts studdering.

I'm not sure what you mean when refering to end gapped or side gapped.

siffer · 10-25-2005, 10:32 AM

Shano · 10-25-2005, 10:47 AM

The S · 10-25-2005, 10:49 AM

siffer · 10-25-2005, 10:49 AM

E Vader · 10-25-2005, 05:17 PM

...the electrode is seperated by a gap on the side or the end by the metal tip.

clinton c · 10-25-2005, 05:34 PM

Shano · 10-26-2005, 01:15 PM

Last night the Plugs were "end gapped" to .030 and I've logged 60-65 miles with no studdering or codes thrown yet.

Thanks for the help guys.

10-25-2005, 10:00 AM	#1
Shano Member Account #: 44823 Join Date: Oct 2002 Posts: 1,325	Misfires and plug gapping.... I'm gettting misfire codes on my car, originally only Cylinder 6, I replaced the coilpack, now I'm getting misfires on in cyl 2 and 4. The offending cylinders have carbon trails running up the plugs to the coilpack boots, Mechanic thinks the boots need to be replaced, he feels they are fitting to lose. I was wondering if this could be blow by, the plugs I'm running are Denso Ik22's, gapped at .038, I stfa and I did see .032 and .028 listed as gaps, so is it possible that the gapping on my plugs are creating this? __________________ MY01.5 S4

10-25-2005, 10:10 AM	#2
E Vader Member Account #: 48790 Join Date: Jan 2003 Posts: 3,996	Missfires at idle I am guessing? I have had a few friends with the same issue. Try raising the idle by 40rpm in the interum. Are your plugs side gapped or end gapped? I have triple side gapped at .036 and no misfires. I had some intemittant issues with missfires awhile back. __________________ .......balance and focus before power.

10-25-2005, 10:28 AM	#3
Shano Member Account #: 44823 Join Date: Oct 2002 Posts: 1,325	No it's only under exceleration... As long as I stay under approxiametly 1/4 throttle or less is ok, but as soon as I apply the throttle even moderately the car starts studdering. I'm not sure what you mean when refering to end gapped or side gapped. __________________ MY01.5 S4

10-25-2005, 10:32 AM	#4
siffer Junior Member Account #: 91036 Join Date: Apr 2005 Posts: 605	Exceleration is shorthand for accelerrration

10-25-2005, 10:47 AM	#5
Shano Member Account #: 44823 Join Date: Oct 2002 Posts: 1,325	sorry man, that's pretty bad on my part, I'm doing to many things here at once. __________________ MY01.5 S4

10-25-2005, 10:49 AM	#6
The S Member Account #: 26684 Join Date: Oct 2001 Posts: 941	Had something similar, it was the stock fuel pump going bad. __________________ His: "Don't hit the cones!" "Oh, ok" 2002 S4 Custom SS 30%, Autospeed Stage 1 OZ SLs Stock exhaust without resonator. Hole in the airbox. Fastest FATS 6.15sec Hers: 01 allroad 2.7t black 35% tint with toys to come. Gone 98.5 2.8 A4 pearl sport avant, with stuff.

10-25-2005, 10:49 AM	#7
siffer Junior Member Account #: 91036 Join Date: Apr 2005 Posts: 605	J/K with ya dude. I do it all the time. Its good to see someone else out there is human.

10-25-2005, 05:17 PM	#8
E Vader Member Account #: 48790 Join Date: Jan 2003 Posts: 3,996	Exactly that..... ...the electrode is seperated by a gap on the side or the end by the metal tip. __________________ .......balance and focus before power.

10-25-2005, 05:34 PM	#9
clinton c Audiworld Junior Member Account #: 9472 Join Date: Aug 2000 Posts: 941	Boost = High cylinder pressure = misfire if gap too big, gap at .028!! __________________ 2000 S4 Quattro: Imola, 6sp. Borla exhaust

10-26-2005, 01:15 PM	#10
Shano Member Account #: 44823 Join Date: Oct 2002 Posts: 1,325	Update: Last night the Plugs were "end gapped" to .030 and I've logged 60-65 miles with no studdering or codes thrown yet. Thanks for the help guys. __________________ MY01.5 S4

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