Cant get my car to run right...

[4geze63]

I searched but couldnt find a related post to my problem.

I had my engine rebuild 6 months ago and it ran perfect up untill I added a gm maf and 650 injectors.

I had it tunned on the dyno and when driving there is no problem with the car, only when it idles its either idling to high, or idles bumpy and no near assmooth as it should be. My car used to have an issue where at warm start-up it would want to die and you would have to start driving it right away for it not to. Upon trying to fix that problem it made the car my unstable while idling at a light once fully warmed up and aswell if I want it to idle at 750rpm it is worse so I have to have it at 930 for it to be somewhat smooth.



Are the 650s to big for my small 16g?, The local shop that is trying to help me out isnt having alot of luck getting it to idle smooth.

I have all supporting mods that shoulkd make it run good.

 

[OverboostXS]

I assume you checked you ISC. If not http://dmtalon.v8eaters.com/ISC.html

 

[4geze63]

I think the problem would be related to the maf and injectors since it just ocoured after it was put on

 

[blue1]

930 to 950 isn't a bad idle speed for a moded 4GXX and i dont think the 650's are to big i am running 1600's with a standalone and its ok, (can never have enough fuel) if you can control it!