[Milt 92GT]

Ok...here is a twist...

The Mustang started doing the idle problem again,so obviously it wasn't the fuel pump..Although the old pump looked terrible...real old looking..

When it started doing the idle problem,I ran the codes and was getting a code 45 KOER...Thermactor air diverter...I had gotten this code before Off and on...so,I found the air diverter and disconnected the hoses from it and plugged them with a couple of screws..The idle problem almost instantly stopped!

I figured to just block them off (let me know if I am harming the car by doing this) since the hoses from the diverter are only (from what I have read) for emissions and are routed from the air pump to the diverter,and then out to the exhaust...

I don't know how exactly, but this seemed to cure the problem.For now..I'm thinking that the excessive air being diverted all the time to the exhaust was causing the O2 sensors to incorrectly read a lean condition.This then causes the computer to unnecessarily richen the mixture which probably was causing the idle problem and the small pops I kept hearing in the exhaust....

Of course this is ALL just theory and for all I know,the problem might come right back just like before...so,I won't call it "solved" until it hasn't done the idle problem for a few days at least......

Anyway,I thought I would update this post with the latest on this problem..if I did find the culprit,maybe it might help someone else down the road..

Thanks for all your help again guys-Milt