• Tiny
  • chevyracing317
  • 1995 Pontiac Trans Am

Noises problem
1995 Pontiac Trans Am V8 Two Wheel Drive Manual 125000 miles

I was wondering what causes a backfire through the intake and cause the vehicle not to start. The motor is a lt1

Wednesday, May 26th, 2010 AT 3:51 PM

1 Answer

  • Tiny
  • rasmataz
  • Member

Ignition timing could be off and wrong firing order/lean and rich mixtures-Do the basic stuffs below

Get a helper disconnect a sparkplug wire or 2 and ground it to the engine atleast 3/16 in away from ground 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, coil's resistances, cap and rotor /distributor pick-up coil, ignition control module, ECM, Ignitor camshaft and crankshaft sensors and computer. Note: If it doesn't apply disregard it

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Wednesday, May 26th, 2010 AT 5:25 PM

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