Paul (70.165.101.130) - Thu Mar 26 07:47:06 2009

95 Silverado 5.7 engine started missing Sunday while I was 150 miles from home. I limped it back home and tinkered with it that afternoon. It cleared up and ran fine for 8 miles. Now it has progressed to the point it won't idle or rev up. it won't even run without pumping the gas.

I have drained and refilled with fresh gas and changed the fuel filter thinking I had bought some bad gas.

The map sensor checks ok. changed the plugs, cap, button and wires. Changed the o2 sensor. still nothing. I couldn't get it to throw any codes so I tryed changing the computer. Still is progressivly getty worse.

I'm running out of ideas, anyone have one to share?

Reply #1 TheMan (68.238.198.114) - Mon May 11 15:14:26 2009

Fuel Pressure????? Try checking that

Reply #2 lee (74.46.226.102) - Wed May 13 17:12:29 2009

I guess it backfires a little-My sons just did that and i thought it was a timing chain-nope= We replaced the sensor on the crankshaft- that helped, also little or no spark on plugs-replaced the coil with a used one runs great--

easy fix would be to run a diagnostic check-

Reply #3 Jeff (74.184.156.26) - Fri Jul 31 23:17:39 2009

Try checking your fuel pressure at the throttle body. I had a pump problem on my 1995 Z71. It was running but just did not supply much pressure unless the tank was full. After trying everything I decided to drop the fuel tank, which is a chore. I found the pump was fine but there is a small section of rubber hose that connects the pump to the plumbing and that hose was almost completely deteriorated! I could have replaced that section of hose but figured on just replacing the pump and sending unit since I had gone to the trouble of dropping the tank. Long story to say get a gauge and accurately check the fuel pressure. If it is not within specs, you are going to have to drop the tank. Good luck. Jeff

Reply #4 Denver Cain (209.240.207.76) - Fri Sep 18 15:03:02 2009

I had my 1995 Silverado truck diagnosed today.The diagnostic code is 22.(grounded wide open throttle circuit)What and where is this on my truck?

Reply #5 Allan Chaplin (142.165.104.61) - Sat Sep 26 17:20:27 2009

Need to know what the flashing codes mean in my 1995

silverado.

Reply #6 bryan (99.194.248.243) - Sun Sep 27 14:07:28 2009

i had the same problem with an older model thunderbird it would crank fine but would not run for . when i gave it gas all you would here was air so someone told me to replace the map sensors. idiots..... that did nothing at all. so i checked the gasket under the throttle body replaced it and it ran great. also i would check the injecotrs themselves they may be clogged or not getting any electrical charge to the injectors for them to allow them to put the proper fuel into the throttle body.

if you have multiport injextion i would check the fuel pressure as well as the inejctors. when they are working you should hear a slight clicking sound. check the gaskets if air is leaking then replace them as well as checking for vacuum leaks.

good luck.

if you cant get it fixed i have a nice 355hp 350 for sale along with a 84 silverado with 485 gears and a 4 speed 700r4 tranny.

Reply #7 Levi (74.32.227.170) - Sat Oct 17 16:25:36 2009

My dad has a 95 z71, i am sick of him complaining so here we go. HE says it is missing. his mechanic friend said that it is thw distributor. is this whats causing it? i have been driving it for the past three days, and pulling a car trailer. i have noticed it miss a total of 3 times, all on a cold day in mn. is it the dist. or is my dad on crack?

Reply #8 Greg Blue (74.13.45.141) - Sun Nov 8 15:05:49 2009

My 1995 chev siverado runs at a high idle when first started.

It drops down after a few seconds to about 1200 rpm and stays there for duration of running. Got 2 codes 33, 35 I, ve already changed throttle position sensor and egr sensor. What should I try next?.

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