New build run ability problem

[GBGN1]

( In closed loop) I'm having a idle type problem at this time. When at idle my blm's are around 121-128 but as soon as I put the car into drive the blm's drop to 90 or so . Sometimes bouncing back up to 121 for a short time but going again down to 90 or so. If I shift back to park it slowly climbs back up but is a bit unstable . I can hold the throttle and usually holds around 127-128 . Car just doesnt feel right.Can't find any vacuum / exhaust leaks . Anyone deal with this? No codes-Damn car is starting to get to me lol. All info in sig.

 

[earlbrown]

BLM's shouldn't change rapidly. It sounds like you might be bouncing between BLM cells.

Have you upgraded to a translator yet and do you have a power logger. If so put up a screen shot of the BLM table. Is everything else verified and set right? IE.. cam sensor, crank sensor, TPS, new Delco PCV, etc....

You mentioned 'new build' and I hate to bring this up, but do you have a flat tappet cam, and are all 12 lobes still full height? #3 exhaust would be quick and easy to check.

How many miles on the build... enough for the engine to have proved itself?

 

[GBGN1]

No it's all in my sig below. It's a roller comp cam . Tps good, cam sensor ( built in light) good. When the blm start dancing around the iac's dance with it but under normal idle there at. 23. I just have a scan master on it right now. Gen 2 translator .just updated by Eric.


Posted from the TurboBuick.Com mobile app

 

[GBGN1]

Probably 20 miles on motor.and didn't seem to have good power/ so looking into it.


Posted from the TurboBuick.Com mobile app

 

[earlbrown]

It's normal for the IAC motor to open up when you get off idle. I think mine runs up to 80 something or low 100's at cruise.