Backfire / popping on acceleration

Discussion in 'Troubleshooting & Diagnosis' started by Tphil413, Dec 2, 2017.

  1. Tphil413

    Tphil413 Veteran Member

    236
    3
    Jun 1, 2007
    San Francisco, CA
    But I do see oil leakage under the headers down on the starter solenoid...Number 2 and 8 plugs looks normal tan to slightly rust color.
     
  2. junkyardZ28find

    junkyardZ28find Veteran Member

    753
    7
    Mar 4, 2012
    des moines, iowa
    How do you have your PCV routed? Where is it at? Lets see an overall engine bay pic...
     
  3. ULTM8Z

    ULTM8Z Veteran Member

    8,571
    130
    May 19, 2000
    Los Angeles
    The white crust on the plug looks suspiciously like coolant residue
     
  4. Tphil413

    Tphil413 Veteran Member

    236
    3
    Jun 1, 2007
    San Francisco, CA
  5. cadillac_al

    cadillac_al Veteran Member

    615
    39
    Apr 22, 2015
    Maine
    Since you have an intake gasket bulge that I have never seen and your end gaskets are falling out I would suggest an intake R&R. That would give you a chance to inspect you cam lobes too. It looks to me like it is getting oil in the intake tract to foul plugs like that.
     
  6. Tphil413

    Tphil413 Veteran Member

    236
    3
    Jun 1, 2007
    San Francisco, CA
    Yes, sounds like the advisable next step. Thanks to everyone for their inputs!
     
  7. COPO

    COPO Veteran Member Lifetime Gold Member

    16,399
    283
    Sep 15, 1999
    Ontario, Canada
    And don’t use the rubber or cork gaskets on the front and rear intake, use the gray Permatex with a 1/4” bead.
     
  8. rocket dawg

    rocket dawg Veteran Member

    248
    12
    May 5, 2015
    Grand Rapids Mi
    I've had issues with the RPM intake and oil usage. Like 1 quart every 100 miles. ALL 8 plugs were getting oil soaked. I still use the RPM intake but now with different heads and I used RVT around every intake port and so far so good. Oil usage isnt a problem anymore. Dont know it the new heads were the fix ( more than likely though) as the oil consumption started with the old heads World Products cast iron heads. (sold)
     

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