1996 silverado vortec running rough
joker1s
06-14-2007, 07:50 PM
have a 96 350 vortec hesitating to take off from dead stop. I changed fuel filter, spark plugs, dist. cap and rotor, o2 sensor, plug wires, and intake gasket. What next?:banghead:
2000CAYukon
06-14-2007, 07:57 PM
Need to check fuel pressure:
Pressure with ignition on, engine off (with engine cold and with engine warm).
Pressure while starting
Pressure at idle
Pressure at 2000 RPMS
Watch pressure after shutting engine off. Pressure will drop but should not drop way off.
Post results when you have them.
//2000CAYukon
Pressure with ignition on, engine off (with engine cold and with engine warm).
Pressure while starting
Pressure at idle
Pressure at 2000 RPMS
Watch pressure after shutting engine off. Pressure will drop but should not drop way off.
Post results when you have them.
//2000CAYukon
joker1s
06-15-2007, 04:56 PM
is there supposed to be a vacuum line hooked up to the fuel pressure regulator? dont have access to a pressure gauge. there was no vacuum hose hooked up to the regulator when i took the old one off and im not sure if there was supposed to be one
Jeremy-WI
06-16-2007, 07:48 AM
No vacuum hose, doesn't need one because its inside the intake
mxmikie
06-27-2007, 12:06 PM
do a compression test (cyl 3/5) plug cat from leaking injectors
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