1995 GMC Yukon



October, 20, 2011 AT 5:58 PM

My 1995 GMC Yukon quit working. We replaced the fuel pump and starter (and the gas tank as it was starting to get paper thin). The truck ran for about 20 miles and backfired; then it quit and is still not running at all. We replaced the ignition module. Nothing. Please help!


1 Answer



October, 27, 2011 AT 8:41 AM

Get a helper disconnect a sparkplug wire or 2 and ground it to the engine atleast 3/16 away from ground-have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, Do you hear the fuel pump come On when you turn key on? If not check fuel pump fuse and fuel pump relay if okay-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,coil's resistances,cap and rotor,distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it and keep testing

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