this sounds as if you may have a weak fuel pump
these must have no less than 60psi at all times..even while turning the starter
I had the pump changed about two years ago. If it was the pump wouldn't it miss going down it highway.
these vortec engines must have allot of pressure to start
sometimes,when the pump is bad,the starter will pull the amps away from it,,because the pump needs more amps
what about the fuel pressure regulator, I had that changed also
the odds are slim on it being the regulator
dont throw parts at it
test the pressure first
Is there anyway I can check the pump pressure??
the pressure test will tell us allot
do you have a test gage?
no, and I wouldnt know where to connect anyway
i will send you instuctions
If pressure is good, what would be next on your list to check
you will need to check for spark on theplug wires
if..no spark..it may need atune up....these vortecs are bad about burning up the rotor or the distributer cap
caused from bad plug wires
if the fuel pressure is low..replace the fuel filter first
i would think the problem is the pump......common problem
Actually, that's what I had done about three years ago new rotor etc .It did burn all that up.
I'll try checking pressure if you send me instructions.
ok..i will need to leave the live chat
this should help you..please print
Test Description The numbers below refer to the step numbers on the diagnostic table.
Notice: Do not allow the fuel pressure to exceed 517 kPa (75 psi). Excessive pressure may damage the fuel pressure regulator.
The Vehicle Control Module (VCM) has integrated IC circuits that are fault protected; therefore, if a circuit has failed, the integrated IC may not be damaged. If that is the case, the IC will keep the circuit open until the fault in the circuit has been corrected.When the fault has been corrected, reinstall the VCM and check the circuit. Replace the VCM only if the circuit is still inoperative.Test Description The numbers below refer to the step numbers on the diagnostic tables.
check the pressure while turning the starter when it wont start