98 1500 5.7 starts and stalls right away

[prcfan]

Last time it ran i was going down interstate and truck quit on me like i shut it off, It would crank and run for 3-4 miles to destination came back out it crankes we drove it about 100 yards it killed and would not crank. After several attemps it cranked and we drove about 10 miles til it did it again. It slowly got worse til now it cranks and kills. I pulled coil wire off when it cranks it sparks but sometime it will not spark. I changed coil and module. now what?

[Rookie]

is it getting gas? check the fuel fillter

[Rick Dorion]

My 97 K1500 did that and it was the fuel pump (100,000 miles).

[prcfan]

My 97 K1500 did that and it was the fuel pump (100,000 miles).

 

<{POST_SNAPBACK}>

 

 

It is showing 60-63 psi what causes the truck not to fire sometimes?

[WestCoaster]

I'm thinking you've pulled no codes yet from the ALDL link? If you had a diagnostic scanner I'd wonder are you getting any injector pulse signal? Is it weak or nonexistent? Spark is sometimes intermittent? Could be the Crank Position Sensor not indexing where to fire spark and trigger injector pulse. Is your Throttle Position Sensor voltage high? Could it be signalling Clear Flood mode and turning off injector pulses? It'd be really helpful if you had at least a code scanner at a minimum to start looking in the right direction or pay a shop for diagnosis. You may have paid more for the parts you changed than the shop diagnosis. Sorry not much help.