Misfire HELP!

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Feb 6, 2003 | 12:39 PM

MPOWERD

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Misfire HELP!

I bought a unichip from my friend and I have had some CEL problems. The code reader says my vehicle is misfiring on cylinders 2 3 & 4. This CEL only comes up when I launch my car hard. The car also pulls up the code P1446 for the in fuel Tank sensor. Will these problems eventually hurt my vehicle, or can I drive it like that.

Help

Eric

Feb 6, 2003 | 12:50 PM

christoph1371

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sorry to sound like an A$$ but QUIT launching!

for the other code, check to see if your fuel cap in on correctly.

Feb 6, 2003 | 02:07 PM

Imprezer

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Posts: 6,965

From: Alameda, CA, USA

Car Info: 02 Black Legacy GT

Misfiring in 3 cylinders in unlikely.

Let me guess, do you have a lightened flywheel or an aftermarket clutch?

Feb 7, 2003 | 12:35 AM

MPOWERD

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No I dont have a an aftermarket flywheel or clutch.

Thanks
Eric

Feb 7, 2003 | 09:56 AM

impreza7

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Imprezer,
Why would a lightened flywheel or Aftermarket clutch throw a misfire code?

7

Feb 7, 2003 | 10:34 PM

ImprezaRSDriver

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Posts: 955

From: Mann Engineering, Santa Clara, CA

Car Info: 13BRZ, 11FXT, 08T25, 07STI, 02WRX

Because the amount of weight that is placed on the crankshaft I believe, because when you lighten the flywheel, it changes the dynamics of the engine a bit and make the engine a little "looser" if you will. I would also assume that the harmonics change also. Because like underdrive pulleys, the weight of the flywheel and pulley is designed to work such that it acts as a harmonic dampener.

It is like saying, I have misfires on all four of my cylinders. But is it really misfiring? I do not think so. Subaru is supposed to come out with a reflash for the misfiring issue.

Here is a good article about underdrive pulleys:
http://www.dinanbmw.com/html/danger_...er_pulleys.htm