Question : radom missing

[rayruner]

I got a 02 3100 malibu with tog headers and a rsm blower, the problem i'm having is radom missing at light throttle, when driving down the road at 10 to 20 % throttle and letting of a little i get a lot of missing on all cylinders and jerking when holding the throttle steady and also when shifting up and down, but only at light throttle and not all the time, it doesn't happen when using more gas, also does it with the blower off, i've gone through everything i could think of including changing the injectors and the computer, i'm beginning to think the trans has something to do with it. anybody have any input except for the normal things like coils wires and plugs, been chasing this for quite a while and out of ideas. thanks

[SappySE107]

What tuning are you doing for all of this?

[Rootie524]

i know on moderate acceleration in my 2002 malibu 3100 at around 30-40+ mph it does alittle jerk kinda thing. like it stutters as if it doesnt know what gear it wants to be in. idk if thats what your trying to describe. your problem seems to be more severe. but i think someone said its a bad code in the pcm or something. it pisses me off though. and it seems to be getting worse/more noticeable.

[rayruner]

missing

Actually my tune isn't to bad, trims are pretty close, i got a dhp, the pe needs a little work, but my problem is at small throttle opening at cruise, mostly, as i said earlier i changed the pcm, little by little its getting worst, i'm hoping it stops running and lights the lamp, other than that problem the car doesn't run to bad.