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Daner · 07-27-2013, 02:11 PM

Put a pressure gauge on and here are the results.
54 ign on 55-62 is spec according to my tech manual
50 at idle
60 when vacuum line from relief valve is removed.
When you hit the throttle, pressure goes to 55 but engine still almost dies.
I installed a new fuel filter. Made no difference on my readings.

I put new plugs and plug wires on before I did any testing. It was one of those things I've been meaning to do anyway. It idles good now.

I'm thinking maybe bad gas?

07-27-2013, 02:11 PM	#5
Daner Registered User Join Date: Sep 2011 Location: Wildrose, North Dakota Posts: 300	Re: 2001 silverado 5.3 missing when pedal is depressed Put a pressure gauge on and here are the results. 54 ign on 55-62 is spec according to my tech manual 50 at idle 60 when vacuum line from relief valve is removed. When you hit the throttle, pressure goes to 55 but engine still almost dies. I installed a new fuel filter. Made no difference on my readings. I put new plugs and plug wires on before I did any testing. It was one of those things I've been meaning to do anyway. It idles good now. I'm thinking maybe bad gas? __________________ Dane 67 Chevy Fleet 250/4 speed 1/2 ton 68 Chevy 250/4 speed 1/2 ton for parts 49 GMC Grain truck 235 1 1/2 ton 76 Chevy 350/4 speed 1/2 ton