5.7 Vortec, New Fuel Pump, Has 55 PSI to the rail, New Plugs, Has Spark, Engine Cranks, No Start
From what I remember before my 96 K2500 wouldn't start, the codes that
would show from the OBD II reader were P0301 and P0700. I believe the
engine was running ok with no obvious transmission problems to me. I have
gone through the basic checks of checking the air filter, checking the fuel
pressure (55psi at the rail and holds the pressure for at least 15 min.), I
installed a new fuel pump about 2-4K miles ago, checked the fuel at the fuel
filter for debris and water, I am in the process of changing out the fuel filter (
just because), checking for spark by using a spark plug test lights (installed
new plugs), I have newer injectors that I changed about 2-4K miles ago (same
time as the pump), checked the pulse at the electrical connection for the
injectors with a noid test light. The engine will not even act like it is igniting and
once in a long time it will back fire. Also, sometimes after cranking it will sound
as if it is continuing to crank and lets out a sound as if it is releasing air once or
twice slowly. My neighbor said he saw the engine rotate in the opposite
direction. I really don't want to pull off the plenum and check the spider
injectors if I don't have to. I was wondering if there is something else besides
clogged injectors that could be stopping the injectors from firing. I did smell
gas but I am pretty sure that the fuel pressure regulator is holding pressure or
else it should be dropping the pressure at the fuel rail. Please let me know if
you have had a problem like this or any knowledge might help. I have had this
truck on non-op for a few years tinkering on it but need to get it running. I am
tired of looking at it in the driveway never moving. It only has 170K miles and
would like to be able to pull our trailer in a month on a camping trip.
Any info would help. Please let me know if you guys have any questions.
I have been looking at forums and haven't seen much on what I'm
experiencing.
