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Overly smokey, running ruff - Silverado 1500 Chevrolet Cars & Trucks

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What the heck is running off??

Posted on Aug 01, 2008

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2 Answers

97 ford Taurus runs ruff backfires


I would suggest you start with the basics. Check your wiring on your spark plugs to ensure they are in the right order. If you can grab an OBD scanner, I'd start with it as well. It can reveal many mysteries. Your running rough usually sounds like a timing issue. If there are over 100,000 miles on the vehicle, the timimg belt will be suspect.
Best of wishes.

Oct 13, 2014 | 1997 Ford Taurus

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Ford f250 runs ruff and will not idle


fuel pressure should be 35 - 45 psi.could have faulty tps sensor.could have intake vacuum leak or ignition timing valve timing off due to worn timing chain.do engine vacuum test replace all vacuum hoses bad leaking egr valve diaphram or gasket will cause engine run poorly.

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tune up,fuel filter,air filter,clog catalytic con.,coils.

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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

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