I have a 77 280Z and am trouble shooting the cold start system. I have been reading post's regarding cold start issues and think I have stumbled on something here. Correct me if I'm wrong but isn't the fuel pump supposed to only come on in the "start" position? If I turn my key to the "on" position my fuel pump runs as well as the start position. And if this is the case then I need to spend time looking at my AFM correct? I know what tests to run from looking at my FSM I just need some reassurance that I'm heading in the right direction. Thanks for your help.

Bob

I have a 77 and the same thing was happening with my car. What I found was that someone in the past had adjusted the AFM to enrich it and in the process caused the shut off to no longer "engage". I returned the "wheel back to it's proper setting and now it works correctly.

http://www.classiczcars.com/forums/showthread.php?42574-MPG-timing-fuel-and&p=368774#post368774

Edited December 30, 201113 yr by grantf

Thanks grantf. I will take a look at that next. I bet that is whats going on because I had to have a Z mechanic adjust it to pass smog.