Mechanics

WHAT WOUKD CAUSE AN INTERMITIT MISFIRE IN A CYLENDER

2003 Mitsubishi Eclipse • 126,000 miles

When the engine light comes on it reads cylender 2 misfire. I replaced the map sensor, throttle position sensor, and the fuel injectors. But at an idle the car runs good and and if I slowly apply the gas but if I hit the gas hard or fast it will mosfire and the engine light will come on. There is no vcume leaks or intake leakd. There are new plugs and wires. I switch the coils around and still cylender 2. Now last night I started to take the engine wire harness out and checked the connectioms. Put it all back together and she ran great. I went out this morning and back to the misfire now I am lost. Any one have any ideas?
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Read3056
October 8, 2012.



If wires are non OEM, they tend to slide off the casing where you plug into the plug tubes. This would result in the wire not reaching the spark plug causing the misfiring.

Recheck the wires for snugness and ensure the wires are reacing the spark plugs. Have the coils tested and ensre you have bright blue sparks.

KHLow2008
Oct 14, 2012.
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