Question about 2005 Mitsubishi Pajero 3.5
I onec checked the plugs, coil packs and fuel system and noted that 1 plug was not firing, I replaced it and the engine performed well for 2 days only then it started again.
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Posted on Jan 02, 2017
The po301 is a misfire code. The backfire can be caused by a excessive amount of fuel, bad valve timing etc.
My guess is you have damage to an exhaust valve that may have occurred when you had the timing belt problem.A compression test will indicate if you have a leaking exhaust valve.The reason for the backfire is the exhaust valve is still partially open when the spark plug fires.
Posted on Jan 03, 2009
SOURCE: timing belt broke bent valves
Hi!!This occurs when the ignition timing and fuel mixture are changed causing an excessive amount of heat.
If the engine is running on a VERY lean or rich mixture, the temp will be so high to make the exhaust manifold glow red,. which would damage the catalytic converter making things worst.
You did not provide the vehicle's year and model, but, you should have DTCs stored in the PCM memory. Scan the computer for Trouble Codes and you'll find out if the mixture is in the lean or rich side and you can make the necessary adjustments. AutoZone, Checkers and similar auto parts stores let you borrow DTC Scanners.
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Posted on Mar 16, 2011
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