0Myhardtop

I think I have a gremlin inside my 99 C5 computer. This is the second time it happened: the 1st time, it was modified with a mild cam,shorty headers and Cat back. On the dyno graph you can see a break-up on high RPM's(5000 to 6500) it fell flat but not totally flat. The tuner figure it out the next ay and as of now, I do not know what caused it (they're not telling). Well guess what, now the vehicle have a new(bigger) cam, heads ported(2.02/1.57) and LT headers(tpis)...now it's doing the same thing again but this time is more obvious. Here is the trick, this is another shop working on it so the previous shop will not talk about tuning secrets!!!
What do you guys think it is...I'm thinking plugs, coil pack or something in the brain box. The current shop have: LS1 edit, Auto tap, A/F monitor on a chassis dyno. This problem have them scratching their heads....it pulls strong down low and it idles fine...What gives!!!

:mad :mad :mad

Violater

Do you have a copy of the dyno graph you could send me??
and what were your #'s
:cheers:

0Myhardtop

No. I do not have one but I could get it. What's on your mind...... What are you thinking!!! :D

Gary2KC5

hard to start the thinking process without some hard data, don't want to be just shooting from the hip.