engine cuts out at 4200-4500rpms

[SilverTurtle]

the car:
1999 30th Anniversary TA
383 stroker
T56
obviously a cammed car
FAST 78? whatever it was before the 90 came out

the problem:
car runs like a champ until 4200-4500rpms... then it drops out like a rock... I've tried everything I can think of that would be an electronic nanny to stop the RPMs, but nothing seems to change the problem... doesn't seem to be knock retard, doesn't seem to be a fuel cutoff, doesn't seem to be something in the 1,2,3,4,5,6 gear limiter... I'm lost.

I'm adding the tune that is in the car now and the tune that I got from the car from back when it was an auto... the tune that was in the car was done by another company, and I had to add in the entire tables to be able to tune the car with HPTuners... but all of the calibrations are there... I'm also including the most recent log, where you can see that at 4200rpms, it looks like I just took my foot off the gas... but I didn't, it just cut out.


any ideas on this one? gotta love A4 to M6 swaps in big cube cars?

[WS6FirebirdTA00]

might want to tune the tables correctly. You are commanding ridiculously high PE values, so surely the MAF/VE are not correct. The timing table is also very screwy.

You do know you are commanding a 7.05:1 AFR, right?

[SilverTurtle]

might want to tune the tables correctly. You are commanding ridiculously high PE values, so surely the MAF/VE are not correct. The timing table is also very screwy.

You do know you are commanding a 7.05:1 AFR, right?

see, and I thought that was wrong... but his car ran like a champ with the 99A4 tune in it before I got to the car... so I just cut and pasted all of his information into the new program when he swapped from the A4 to the M6... and now that you say that, I remember thinking that something was inherently wrong with the whole thing when I was cutting and pasting, but that was a lonnnnnnng day... thanks for pointing that out.

[WS6FirebirdTA00]

no problem. A lot of cars can run well on a sub-par tune. I see it quite a bit and most people would never know until they see how the car drives/runs with a good tune in it.