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engine popping under load
Posted 24 April 2012 - 07:32 PM
Posted 24 April 2012 - 07:37 PM
Posted 24 April 2012 - 07:40 PM
Posted 24 April 2012 - 11:46 PM
And might I add that's it tearing out the center of the air filters? Did it to my original and I figured it was a fluke and just old and I put a brand new one in and it was tore out aswell? Im guessing it has something to do with the fierce back fires?
Edited by danzick, 24 April 2012 - 11:49 PM.
Posted 25 April 2012 - 12:57 AM
I pulled these values from the "How to Keep Your Subaru Alive" book that tboned linked me to:
OHC models: The resistance for the coil and spark plug wires should be within the following values:
Coil Wire - 2.43k-5.67k
Wire #1 - 8.38k-19.56k
Wire #2 - 2.99k-6.97k
Wire #3 -7.90k-18.44k
Wire #4 - 2.41k-5.62k
Posted 25 April 2012 - 09:18 AM
Posted 25 April 2012 - 05:59 PM
Posted 26 April 2012 - 04:18 AM
A worn cam lobe, or worn cam follower for an exhaust valve can cause an above idle backfire thru the intake.
Burnt gases can't escape the cylinder if the exhaust valve isn't opening properly. Higher engine RPM's will leave those gases in the cylinder when the intake valve opens, causing a backfire.
Have repaired a few OHC engines with that problem. Haven't done a Subaru yet, but it is possible on these engines also.
Like I said, just a thought...
Posted 26 April 2012 - 04:59 AM
it drove me nuts trying to find what was wrong as the cap rotor coil leads and plugs where all only about 3 months old at the time....'newish' bum leads aren't the kind of thing i had struck before
Posted 26 April 2012 - 10:26 AM
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