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    Results 1 to 7 of 7
    1. #1
      Join Date
      Feb 2012
      Location
      Mocksville, NC
      Posts
      331
      Country Flag: United States

      Bad intake valve?

      Evening all. Started my engine and heard some popping noise coming from the firewall driver side. I managed to limp home with the motor almost dying and sputtering along the way. Now the car won't start and when it does, it still makes that popping noise, idles for about 2 seconds at 300 rpm, and dies. I've went through all the ignition components. MSD box, coil, plug wires, plugs, duel sync distributor and even went through my ECM with no codes. Makes me think its mechanical now. Car only has about 15 miles on it with a fresh rebuild. The motor was sitting for a few years but I was rotating it regularly and keeping it oiled. Any ideas?
      1968 Charger R/T, EFI,SC,6-speed

    2. #2
      Join Date
      Nov 2016
      Posts
      157
      Check your intake gasket. Was there any backfire?

    3. #3
      Join Date
      Nov 2016
      Posts
      157
      Maybe a valve adjustment wasnt locked tight enough

    4. #4
      Join Date
      Feb 2012
      Location
      Mocksville, NC
      Posts
      331
      Country Flag: United States
      No backfire while I was driving but it did backfire a few times when I was trying to start the car. Also a puff of white smoke came out of the throttle body. I'll also check the valve train again. I've got a compression check gauge but the car won't stay running for me to take a reading.
      1968 Charger R/T, EFI,SC,6-speed

    5. #5
      Join Date
      Nov 2016
      Posts
      157
      Intake leak or valve out of adjustment. Did you pull the valve covers?

    6. #6
      Join Date
      Dec 2010
      Location
      Fredericksburg, VA.
      Posts
      3,155
      Country Flag: United States
      You did not say but if you have flat tappet lifters with only 15 miles it sounds like you wiped a cam lobe. Pull the plugs and run a compression test. Next, I would pull the valve covers and look for broken valve springs and recheck valve lash then spin the engine by hand and carefully watch the rocker arm movement for each cylinder to verify the camshaft lifter movement. Just FYI, If you have wiped a cam lobe you might as well plan on pulling the engine back out because all that debris will be circulated through the entire engine and will probably have damaged the rod, main and cam bearings.
      Steve Hayes
      "Dust Off"
      68 Camaro

      Given sufficient initial acceleration, even pigs can fly!

    7. #7
      Join Date
      Feb 2012
      Location
      Mocksville, NC
      Posts
      331
      Country Flag: United States
      Thanks for the input guys. Gonna see what I can do this week. Appreciate it.

      1968 Charger R/T, EFI,SC,6-speed






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