Multiple cylinder misfire code... but car runs totally fine?
10-19-2006, 01:17 PM
#1
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Join Date: May 2002
Location: Chicago 'burbs
Posts: 611
Multiple cylinder misfire code... but car runs totally fine?
Well, the GM847 has been running great so far on my stock bottom end motor with my old Speed Inc XE 224/230 tune. Car pulls strong, idles well, and is totally streetable in traffic. However, I'm getting the multiple cylinder misfire code. The thing is, the car seems to be running totally fine. No awkward shaking, stumbling, or anything like that. I have a data logging / scan tool but I'm not sure what to look for.
Is this just a tune issue?
Thanks
Is this just a tune issue?
Thanks
10-19-2006, 02:17 PM
#2
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Join Date: Mar 2003
Location: San Jose
Posts: 159
Re: Multiple cylinder misfire code... but car runs totally fine?
The 847 should produce a lopey idle, and a lopey idle is essentially a bunch of random missfires. I suspect that you need to disable code p0300 through reprogramming.
Scott
Scott
10-19-2006, 02:40 PM
#4
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Join Date: Dec 1999
Location: Jupiter (NPB), Fl
Posts: 3,852
Re: Multiple cylinder misfire code... but car runs totally fine?
As noted, your crank position sensor is being set off at idle due to the rough idle that cam has. Even my small cc503 set off my crank position sensor. Just disable it and call it a day.
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