I just put my gm stage 3 pcm and 2.9'' pulley back on the car, but now when I slowly accelerate the car is jerky, and when I full out floor it, it's fine. What could this be caused from, I put new plugs in and gapped them to 40, and also the stage 3 pcm is suppose to reset the oil life when installed, but it never did, is that good or bad? I also have aem intake, and catback.

bump, anybody?

 

I dunno man, you sure you put the right pcm in I know stupid question

 

Don't worry man I thought the same thing too, I pulled it back out and checked it, it was the stage pcm. How do you know if one of your injectors is going bad?

 

Ehh couldnt tell you

Off-topic how do you like the stg 3? I have a zex kit do you know if that will work with it? I have been pondering going that route

 

sounds like a TPS sensor going bad to me... could be the MAF to. i've seen both with those simptoms.

 

Man I love it, when I had it installed before it was awesome, road smooth then, I was thinking of getting the zex kit, but it says its only for a 50 dry shot, not a 55 dry like the zex, so im not sure.

Thanks for the advice.
I'm going to go by some maf cleaner tomorrow and try that, see if that helps.

 

what do u mean exactly by jerky, because im not staged at all and i get the hiccup effect sometimes at slow speeds.

 

will feel like a dropped cylinder...

as far as the rest of your question goes....
you might be feeling some belt slippage... i run a 2.9 also and i can tell there is some slippage down low every now and then but not much.. it will give the car that little "hiccup" feel while accelerating.. but nothing extremely noticable.. just feels like your power comes on in stages instead of linear..

 

car used to do that when it was running super rich becuase Doc tuned it for 42#s injectors when I had 60s, so you only imagine.....

 

I heard that GM has a new Reflash for our ECU's that are not staged to get rid of those hickups

 

I'm also running a stage 2 belt, do you think it could still be slipping?

 

i also have the stage 3,never had a problem with the belt.my problem after install was clutch it was slipping like hell

 

look at the belt.. you will be able to tell if it slips.. look for odd wear patterns or anytype of odd looking rivits/cuts