fuel issue

[mdcowboy63]

I have  a 1998 gmc 1500 with the 5.7 . Pump has 64 psi pressure and the fuel relay is working. The vehicle acts like it is not getting enough fuel and will not start..I have replaced the coil, dist cap. ignition control module, rotor, spark plugs, spark plug wires, crankshaft position sensor as it was bad as well as the cam sensor . it tries to start but that's it.

[riverbanks]

Try disconnecting the MAF electric connection then try, sometimes they cause a no start

[CamGTP]

If you have a spare key or a valet key, try those as well to see if you can rule of a security issue.

 

 

[Edone626]

Fuel pressure regulator

[sefiroxx]

Air, fuel, spark.

Spark, check each plug wire for spark

Fuel, probably too much pressure that could flooding. Attach pressure guage and monitor.

Air, use scanner and verify air pressure readings. Clean maf with and cleaner. Disconnect intake and verify throttle operation. Check tps reading when manually operating throttle.