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99 Forester check engine P0303
Posted 24 October 2004 - 02:07 PM
Posted 24 October 2004 - 02:46 PM
Posted 24 October 2004 - 10:55 PM
Sounds like it may be injector or intake valve deposit related. Have you run any injector cleaner through it? If there is a clogged injector or really bad valve deposits it may take an aggressive regimen of cleaners or a professional cleaning to improve things. I suppose you could move the #3 injector to another cylinder to see if the miss follows. Make sure the connector is secure and clean on the #3 injector. Has the fuel filter been changed recently?
Posted 24 October 2004 - 11:31 PM
Posted 25 October 2004 - 08:36 AM
Posted 02 November 2004 - 03:38 PM
Let us know the results of the comression test. I'm having similar trouble on a 2000 OBW, and the compression is low in the offending cylinder. I'm hoping for a stuck valve myself.
Posted 13 November 2004 - 03:09 PM
Posted 13 November 2004 - 10:05 PM
Running the car for a year with a misfire probably didn't help and would have an negative effect on the catalytic converter as well
If the insurance company is going to pay for the one side only (which they may)I would suggest you do both sides (valve grind , head gaskets ,ect)
Posted 13 November 2004 - 10:57 PM
Posted 18 November 2004 - 03:20 PM
I was using the search engine using P0303 and came across some interesting posts.. the one on misfire 1 +3, buddythedog suggested to check for a faulty exhaust valve using the dollar bill test (unfortunately here in canada bills start in the $5 amount)..anyway i tried it an lo and behold the bill was alternatly sucked in then blown out of the tailpipe...so when i take it in next thursday for the tear down i will tell the mechanic about the test and ask him to check for a defective exhaust valve..will keep everyone posted..
Posted 18 November 2004 - 03:37 PM
My hope is not to take it apart again for 90,000 miles.
Posted 05 August 2005 - 12:38 PM
Good luck to those chasing similiar problems.
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