Engine power falls flat about 4800-5000 to redline

[red12secz28]

I have been loogging my 98 m6 vet recently to determine what the cause of the engine power loss was. It happens when I go into wot and got past 4800 rpm. The car pulls hard and strong then just dies off. I noticed no knock, a steady 26.5 degrees of timing. o2's leveled out at 930's mv on both banks from 3500 to 6400 rpm. Ipw stayed steady and progressively went up to about 78% @ 6400. Throttle percent was 99.6%. I did notice that grams per cylinder was @0.80 at 4800 then dipped down and went back to 0.80 @ 6400 when I let out the throttle. I do have a log file that I can email anyone that would like to help me. Plus I have a tune file also.

[redhardsupra]

send me tun/log

[red12secz28]

sent to your email

[joecar]

I have been loogging my 98 m6 vet recently to determine what the cause of the engine power loss was. It happens when I go into wot and got past 4800 rpm. The car pulls hard and strong then just dies off. I noticed no knock, a steady 26.5 degrees of timing. o2's leveled out at 930's mv on both banks from 3500 to 6400 rpm. Ipw stayed steady and progressively went up to about 78% @ 6400. Throttle percent was 99.6%. I did notice that grams per cylinder was @0.80 at 4800 then dipped down and went back to 0.80 @ 6400 when I let out the throttle. I do have a log file that I can email anyone that would like to help me. Plus I have a tune file also.

That points to your VE table and/or MAF table.

[red12secz28]

Sorry, i didn't mention it. I am running in sd mode. Maf is still hooked up