I have a bone stock 91 rs convertible with a 305. Every time I go to start it, it turns over good. Fires up and then shuts right down. I disconnected the MAP sensor. Still shuts down. I'm getting fuel. Must be getting spark if it starts. Not even 5 secs of run time and it shuts down. HELP!!! Please!!!

 

have you flashed for codes to see if there are any

 

No codes. There is gas getting to the throttle plates. It just starts and shuts right down, doesn't even gets a chance to idle. It's like some turns the key or fuel off.

 

i guess you could try pouring some gas in the tb to see if it runs for a while longer. not too much. or if you have a timing light hook it up an see if the spark stops suddenly. try and see if its a spark or fuel problem.

 

Have you checked out the VATS system? I am suspicious of it when you describe how your car just shuts down. This can be bypassed. I'm gonna have a good mechanic do it for my 92 RS. Mine seems to prefer only one key. The other set gives me problems similar to what you are experiencing.