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GeorgeFl9483's avatar
GeorgeFl9483
Explorer
Sep 29, 2013

Class A 1996 Chevrolet 454 engine starting problem

I have continuing problem on starting 1996 Chevrolet 454 engine. Problem appears to be ignition, no spark from coil. It will start sometimes, run fine, shut it off and try to start later and it won't start. Question: Is adequate fuel pressure required to switch on ignition? After cranking with no spark, there is no smell of gasoline with air filter removed. Thought problem could be fuel pump or fuel filter.
Class A
  • enblethen's avatar
    enblethen
    Nomad
    Sep 29, 2013
    The fuel pump relay provides initial pressure to start the engine. Then the oil pressure switch activates the fuel pump.
    Igntion is controlled by crankshaft and camshaft positon sensor.
    The fuel pump relay is inside the doghouse opposite side of wall from gas pedal. You should be able to hear the relay click off after a couple seconds after the igntion is turned to the on position.
    Look closely at the oil prassure gauge for oil leakage or loose connection. It is located along left side of engine just above the pan line toward the front of the engine.

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