Check engine light flashes - does NOT set code??
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Drifting
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Check engine light flashes - does NOT set code??
OK... I'm looking for a little help here. Car has had some motor work done and custom tuning done by a well respected tuner. All tuning is perfect except the check engine light flashes about every 10 mins then goes out but doesn't set any codes. Full exhaust with cats and the O2 sensors check OK. Real time captures, gm tech 2, autotap, and LS1 Edit reveals no problems or codes being set. All tables well within spec etc. They even tried a brand new PCM... same flashing light but no code problems. Any idea's people? They are guessing it might be a resistance variable in the wiring harness but no-one really knows. Any theories guys?
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St. Jude Donor '03-'04
Re: Check engine light flashes - does NOT set code?? (Godspeed)
Interesting.....is this because of larger cams in stroker motors?
The at idle misfire tolerances may need to be increased.
Melting Slicks
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Re: Check engine light flashes - does NOT set code?? (Buckmaster)
Interesting.....is this because of larger cams in stroker motors?
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Drifting
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Re: Check engine light flashes - does NOT set code?? (Godspeed)
Thanks for the tip Godspeed... I'll have that looked into. :thumbs: :thumbs:
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St. Jude Donor '03-'04
Re: Check engine light flashes - does NOT set code?? (Godspeed)
One more question Godspeed. How is this value displayed in Edit? If it hasn't been adjusted after the mods were installed.....what should it be adjusted to?
Melting Slicks
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Re: Check engine light flashes - does NOT set code?? (Buckmaster)
One more question Godspeed. How is this value displayed in Edit? If it hasn't been adjusted after the mods were installed.....what should it be adjusted to?
It's better than turing misfire detection off because you still get detection at higher RPMs in case you get a bad plug or wire:)
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St. Jude Donor '03-'04
Re: Check engine light flashes - does NOT set code?? (Flyin'Brian)
Set all values to 32000 in the (idle by cyl), (low RPM by cyl) and (low RPM) misfire detection tables. this works good for big cams.
It's better than turing misfire detection off because you still get detection at higher RPMs in case you get a bad plug or wire:)
It's better than turing misfire detection off because you still get detection at higher RPMs in case you get a bad plug or wire:)
Melting Slicks
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From: Wichita KS
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Re: Check engine light flashes - does NOT set code?? (Bytes U)
No prob guys :cheers:
I hope that fixes her up :yesnod:
I hope that fixes her up :yesnod:
