Misfire!

1987 CHEVROLET MONTE CARLO
71,000 MILES
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TOMMYLIMO
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  • 23 POSTS
I Have a 1987 Monty Carlo SS 5.0 H.O. Under hard Acceleration It Pops Through The Carburetor!! It Is Intermittent? Could It be A bad Spark Plug or Ignition Wire? Thanks Tommylimo!
Apr 24, 2011 at 2:18 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Could be caused by one of the following below

Oxygen sensor.
Catalytic converter.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position sensor.
Crankshaft position sensor
Knock sensor
Manifold absolute pressure sensor.
EGR Valve
Fuel pressure regulator leaking or defective fuel pump.
Fuel contamination.
Foul/defective spark plugs.
Open spark plug wires.
Ignition coil/Coil packs defective.
Incorrect ignition timing.
Cap and rotor.

Note:If it doesn't apply disregard it and keep testing.
Apr 24, 2011 at 2:19 PM
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TOMMYLIMO
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Thanks Rasmataz!! I Have new Plugs,Cap And Rotor and Coil!! No! Cats!! No! Throttle Sensor!! Oxygen Sensor Only A Year Old!!Egr!! Blocked Off!! New Fuel Pump!! Everthing Is Fine!! Timing! Etc!Need A Better Answer !! i Checked all The Above!! Ignition Wires Are Two Years Old!!Thanks Tommylimo!
Apr 24, 2011 at 9:04 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
What do you have for fuel pressure reading KOEO and KOER
Apr 24, 2011 at 11:35 PM
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TOMMYLIMO
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  • 23 POSTS
I Will Check It And Get Back To You! Thanks Again! Tommylimo.
Apr 25, 2011 at 11:47 AM
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TOMMYLIMO
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  • 23 POSTS
rasmataz I checked Fuel Pressure and It's Fine. Right Where It's Supposed To Be!! What Next? Thanks Tommy!
May 4, 2011 at 7:06 PM
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