Ok, here is what i have, 1999 two door 4x4 4.3 auto. Ran perfect then.....started up.. And immediately dies, i've checked everything...relays, fuel, fueses, finally with advice from mechanic friends everyone decided it was the fuel pump, well..340.00 at autozone i bought an entire new fuel pump....and installed. Guess what? Does same thing, will start then die, start, then die, will not stay running. It's showing no codes, i'm beat....any ideas????

 

did you check the spider injector?

 

IS the security light on?

 

Is there any active codes?

 

Did you change the fuel filter with the new pump?
Did you replace the sock in the tank with the pump?
Did you do a fuel pressure test?

 

To the OP, my 97 is kind of doing the same thing. Checked the Fuel Pump and Fuel Pressure all are fine. New Ignition Switch and Cylinder. The Dealership is puting in a New Starter tomorrow, not sure if this will correct the problem but, I am so hoping it does.

 

I have not checked the spider, hoping to find a fix with out taking the engine apart....fuel press. Good, no codes, no security light....but one caveat...the sucurity light had come on rare instances but not now?? Still stumped,

 

Check the Fuel Filter.