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View Full Version : 04 GTO spark retard problem...


rubbersidedown
June 22nd, 2010, 07:44 AM
this is a 64 impala swapped with 04 GTO LS1 & 4L60E. @ WOT in 2nd gear, timing is retarded down to 0-4 degrees, knocking ALL the power out of it. All ABS & traction control stuff are gone, I believe it may have something to do with that. How do I make it stop retarding? It will not do it in first gear nor Drive, but consistently in 2nd gear. Timing goes from 23 @ WOT immediately down to 0-4 degrees at 3500-3600. I can't find anything that correlates exactly to that. Thanks in advance
joecar
June 22nd, 2010, 10:17 AM
Post your files.

Are you getting KR...?
rubbersidedown
June 22nd, 2010, 11:12 AM
here ya go... I can show you the dyno graph also, it will NOT do it in first gear nor 3rd, and it does it on the street as well as the dyno... I can post up the dynograph too, it pulls good to 3500 and then dives.
thanks
rubbersidedown
June 22nd, 2010, 11:12 AM
there is little knock retard (2-3) and the engine is stock
1meangto
June 22nd, 2010, 12:12 PM
Are you using the tcs box deal that came with the 04 gto's I can't remember but I think it has a second weird computer the throttle cable came through. I had the same kind of issue with it my 04 when we gutted the car and got rid of it. Try flashing it to a 2002 camaro. Try this attached file you'll have to retune it or if you want and if I get the time I can copy your files to this OS. I'm not sure when I'll have the time though
rubbersidedown
June 22nd, 2010, 12:28 PM
can't flash a 512k tune in a 1mb pcm, can ya? I thought of this, just hadn't tried it yet... that is the failure status is gave me...
1meangto
June 22nd, 2010, 12:30 PM
Or try this tune in it. Just try it and see if it still has the second gear issue. It has all stock spark and ve tables from a 04 gto. I has the theft system disabled.
1meangto
June 22nd, 2010, 12:33 PM
Oh crap I changed my pcm I forgot about that sry not sure what to do then. Trying to come up with another idea for ya. All the 1mb stuff had Throttle by wire as far as I know hmmmmm let me think awhile.
1meangto
June 22nd, 2010, 02:40 PM
Okay try this
joecar
June 22nd, 2010, 07:14 PM
Can you hear it knock...?

Do you not get it in higher gears (3rd, 4th present more load than 2nd)...?

Is there a possibility that it is a mechanical noise (internal or external)...?
joecar
June 22nd, 2010, 07:24 PM
I can't see why/what is pulling timing down that low... log the EST_XXX_DMA pids to see if those indicate why.