Enging Shutdown Problem..Help!

[rivs]

Im having exactly the same problem on a 90 gt. Any updates on this will be appretiated

[Lashbrook27]

I replied to you private message but to update for everyone else who may be interested. I was having several problems with my car. The first problem was a starting problem. I fixed that issue first because it was my first problem. Once I fixed that I put the code reader on it. I was getting a code 22 (MAP/BP sensor). Since this only reads atmospheric pressure I picked up a new one. Atleast that is all it does my 1990. Replacing that fixed my other problem. I am guessing due to the bad signal from the BP sensor the computer was going crazy. I hope this helps anybody with a similar problem. I picked up the code reader from Autozone!!

[rivs]

thanks a lot for responding, Did you buy a stock map or you upgraded to 2 bar?? Ill ask a buddy of mine for his to test it on mine.

[Lashbrook27]

On my 1990 it reads barometric pressure. I picked it up from a local autozone, stock replacement. Not sure why a bad reading from this cause my WOT and fuel relays to start clicking.

[rivs]

What was your starting problem?? I installed another MAP sensor, and still the same, also checked the under seat realay and the WOT relay and they are good. removed the ecm and cleaned contacs, jumped the ECM relay and still problem, im going crazy with this. I need an exorcist!!!

[Lashbrook27]

My starter relay was staying closed, so the starter would stay cranking after the engine was running. I had my starter checked/checked out okay but the bearings were shot/replaced that. Didn't know if ignition switch racall was done, so I picked up a new one. My contacts in my neutral/park safety switch didn't sound good so I picked that up also. There was an aftermarket securty system installed on it before I purchased the car. There were all kinds of splices under the dash, so I removed all of that crap. My starting problem is solved. Is your computer giving you any codes?

[Lashbrook27]

I wouldn't have replaced the MAP sensor unelss you were getting a code 22. Those things don't typically go bad. start with checking for codes. If you don't have a reader pick one up from autozone. It is pretty cheap and easy to use.