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misfire issues

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Old 12-22-2010, 06:09 PM
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Default misfire issues

I'm trying to track down some misfire issues and was hoping y'all could take a look at my tune that I got from my tuner and let me know if y'all see anything off the wall. Mods in sig. Thanks a lot.
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Last edited by CayenneRedV6; 12-22-2010 at 06:29 PM.
Old 12-23-2010, 12:57 AM
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There is nothing in that tune to cause your car to misfire. Can you even imagine how BAD a tune would have to be to cause a misfire? I'm accused of it occasionally with a mail order while an owner searches for his issue (you know, everyone's car is PERFECT so it MUST be the tune...).

Unless you force OL and 9:1 AFR at light throttle, how else can a tune even make a car misfire? Even then, I'd guess it to be plug fouling that would lead to misfire vs the mixture itself.
Old 12-23-2010, 01:34 AM
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OK thanks. I really have no idea about the tuning aspect of it but people kept telling me that it sounded like my tune so I thought I'd have someone else look at it and let me know what they thought. Thanks again.
Old 12-23-2010, 01:37 AM
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i have the same problem at idle, could it be bad spark plugs or wires?
Old 12-23-2010, 01:50 AM
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check your coils also
Old 12-23-2010, 01:58 AM
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These are the readings I got off the coils. I think they are in Mega Ohms. Front indicates the front of the engine. The left column is therefore the drivers side and the right column is the passenger side.

---front----

.070 .068
.065 .073
.083 .079
.069 .074

So what range are these things supposed to fall in?




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