Car has been running beautiful the last year that I've had it. Done excellent regular maintenance, and taken great care of it. Recently I swapped out my radiator, and hoses (cooling properties only). When I was all done I went to start it and it wouldn't start. It turns over, gets spark and fuel, and revs up but then immediately dies. Won't idle at all. I just changed my spark plugs and my MAF and still nothing. My friend thinks it might be my safc, but all the settings are the same as they were when the car ran....the only thing that someone suggested is maybe a vacuum leak but i dono how to check that... Otherwise I'm stumped...please help. Its a 1989 GTUS non turbo btw.

 

Could be the AFM. It has a fuel switch inside which keeps the car running immediately after turning over (above 500 rpm and the AFM takes over in supplying fuel). You can bypass this fuel switch by jumpering the two wires in the fuel check connector.

 

how do you know it wont idle, if it doesn't start?

 

It fires, and revs. But doesn't idle.

 

so it does start

 

Take your plugs out, spray them with brake clean and blow them off. take out your egi fuse and then crank the car over a few times with the spark plugs still out to see if fuel comes out - you may or may not see any depending on how flooded the car may be.

Put your plugs and fuse back in and see if it makes any difference. You may also have a vacuum leak and the afm isn't seeing any air flow and stops fueling at which point your car stops running.

 

So I got the SAFC disconnected, and the car runs!! Sorta rough though. It won't really idle on its own, but it will rev up and sounds healthy. Do I need to do something to tell the car it no longer has the safc? My friend thinks its dirty bad fuel from three months ago. Adding a fuel additive now. But any thoughts?