Question about 2000 Ford Expedition

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My 5.4 is idling ruff. Runs real ruff in gear and

Help !! Engine is running ruff. I already checked for vac leaks and had a mechanic look at it and said catalytic converters were clogged. It backfires through the throttle body. It's a 5.4l. Shakes like *** when you get in to overdrive. Got underneath it and the passenger side cat was glowing. Any suggestions ?

Posted by Anonymous on

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You have an overrich fuel condition.
That will make the Cat over heat and in time will ruin it.
Check for codes
Check for misfires
Check O2 Sensors.
Fix the engine driveablitiy issues, and hope converter is okey. Not likely if you caught it so late ,it is red hot.
A ten year old converter being clogged,would seem to me, to have been helped along ,by lack of necessary maintainance on the engine

Posted on May 12, 2010

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