I have a 87 GTA running the MAF 6E system. Every single year I get it out of storage something always seems to change on it, and I will have to readjust the fuel to get it to run right. This year it idles very lean, the blms go right to 160, I have adjusted the injector constants, maf tables, pulse width verse batt voltage and nothing changes it, I went both ways lean and rich, little changes, big changes, nothing helps. I am using the tunerpro rt with the autoprom. Any ideas???

 

Low fuel pressure?

RBob.

 

Does your O2 sensor work at all?

 

Either of the above or either on the verge of complete failure will do it.

Vacuum leaks.

Dead cylinder?

later
Jeremy

 

Well I just replaced the o2 sensor last year ( but that doesn't mean that its not already bad ) and the fuel pressure is at 42 psi at idle. I will double check the o2 sensor and get back to you.

 

Bad or dead fuel injector?