1995 GMC Truck wont start.

DASOLOMON39

MEMBER
1995 GMC TRUCK
V8
4WD
AUTOMATIC
50,000 MILES

Have a 1995 gmc 4x4 1/2 ton engine is 350. Park it at night and in the morning went to start it and back fired a little bit and seems to want to start but wont start. When I put the gas padel all the way down it feels like it want to start but it just wont start. Changed oil and filter cleaned dist cap and rotor and check all spark plugs. What is the matter with it?

Saturday, March 21st, 2009 AT 9:41 PM

1 Reply

RASMATAZ

MECHANIC
75,992 POSTS

Get a starting fluid or ether and spray into the carb or the throttle body on an EFI. Did it start and die? If not disconnect a sparkplug wire or 2 and ground it to the engine -have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, check the fuel pressure to rule out the fuel filter/fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs, distributor pick-up coil, ignition control module, cam and crank sensors- Note: If it doesn't apply disregard it

If both fuel and spark is present-check the valve and ignition timing, this will lead you to problems with compression and valves opening and closing at the wrong time/broken or jumped timing belt/chain

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Saturday, March 21st, 2009 AT 9:50 PM