rocmemphis

Log File

Major Mods:
LT4 Hotcam
PCMforLess hotcam tune
Comp Cams 1.6 rollers
Crane 10308 spring kit
Vig 3200 stall
MAC headers

Car has been running a little off lately. I can't pinpoint the problem b/c it comes and goes. Basically one day it will tick really loud and run like crap...then the next it doesnt tick very bad and runs great. This log is from today when it was running very bad. Also to note it was 40 degrees outside and the IAT was reading 86 at one point if that matters. I have checked the pushrods, changed the plugs and wires....problem still persists. Any help is appreciated.

Injuneer

You've got a couple of degrees of knock retard showing up several times when you opened the throttle. The long term fuel trims show a difference of up to 15% left vs. right sides in the lower load Cells - e.g. 16, 5, 6. Seems like the left side is cutting fuel and the rght side is adding fuel in those instances. The misfire count looks higher on #1 and #6, repeatedly.

It shows you never went over 75% throttle.... is this correct? You never put it all the way to the floor during that data log?

rocmemphis

That would be correct. The engine was ticking so insanely loud that I didnt want to try it . This has been happening for a while and I can say from my previous log files that at WOT things seem to clear up. Although occasionally at WOT I will get 5 - 6 degrees of KR. I pulled my rockers and pushrods last night and they were all good.