OK guys I have a 89 gta with 383 cid 224/235 520 in 530 exh . with a 115 lobe . My engine idles around 900 rpm tps is .54 blm# 108 in cell 5
in park at 2500rpm tps is .74 blmis 106-108 in cell 11.
The problem im xperiencing is my headers are glowig after a normal cruise and of course xtreme under hood temps. Any advice or help is greatly appreciated. tHA
NKS.
:hail:

 

'165' ECM?
What size injectors?
What cylinder heads?
What intake manifold setup?
Are those BLM results with the stock chip?

Quiz: Knowing that your BLM's are below 128, what is the computer doing; adding or removing fuel?

tom

 

30lbs svo inj.
afr 195 cc heads
miniram2
custom burned ed wright prom
answer to question -- I woild think it is trimming fuel with those numbers
thanks

 

Headers glow because the mixture is still burning on the way out either because the timing is too retarded or way too much unburned fuel. They also glow because of extreme exhaust temperatures mostly caused by vacuum leaks (lean AFR's) at those RPM's.

 

If it's a custom burned Ed Wright prom then I would contact him and tell him what's going on. I believe he will work with people to try to get a good match.

 

so if blm's are above 128 then its running lean and is adding fuel. where should they be

 

BLM should ideally be 128. at 128, the ecm is not adding nor removing fuel meaning the calibration is correct at that individual point.