Engine Trouble....on a 1997" with a 5.7 Liter

Discussion in 'General Chevy & GM Tech Questions' started by chase0320, Nov 6, 2012.

  1. chase0320

    chase0320 New Member

    i have a 97 chevy k1500 with the 5.7 i changed the plugs,wires,cap and rotor truck running really rough you can smell fuel in the oil and very heavy at the motor. i have changed plugs twice cylinder 5 and 7 the plug is wet covered in fuel and and cylinder 6 is fouled out. i don't know if i have a injector stuck open or if maybe the fuel pressure regulator have any thing to do with it i am at a stand still i don't want to drive it because i don't want to screw it up more than what it already is. but it is my only transportation. any advice would help thanks.

    99'HEARTBEAT MODERATOR Staff Member 5+ Years ROTM Winner 1000 Posts Platinum Contributor

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  3. stratct

    stratct New Member

    Is it TBI or MPI?
  4. MrShorty

    MrShorty Epic Member 5+ Years 1000 Posts

    With 3 of 8 cylinders showing signs of fouling, I would not think injectors first -- seems unlikely to have multiple injectors get stuck open at the same time. My first thought would be a regulator issue. With a flashlight and a mirror, look down the throttle body for raw fuel in the intake (indicating that the diaphragm in the regulator is ruptured). You might also put a fuel pressure gauge on it and see if the system is running at too high of pressure or if the system holds pressure when the pump is off.
  5. chase0320

    chase0320 New Member

    i believe it is mpi

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    i will have to check that out thanks for the advice i am changing the intake gasket this weekend i will take a look and replace i know i used a 1/4 tank of gas within 7 miles so it is getting worse

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