Question about 1992 Cadillac DeVille

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1992 Cadillac DeVille idling problem

Car idles rough,has a loss of power, and skips a little bit but doesnt backfire or anything like that. Its like a sort of mis-fire but i replaced the spark plugs, wires, dist. cap, ign. coil, TPS, EGR,MAP sensor, added injector cleaner, and cleaned the throttle body......All for NOTHING.. None of that fixed my problem. I did a compression test and ALL cylinders are good....What could it be?

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  • bdpatt Oct 01, 2008

    Same problem as above. Loss of power and very bad gas mileage. Poor idling. Black smoke sometimes. One mechanic said it may be something with the transmisssion. I hate to keep spending money and not getting it fixed.

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Hi,you can run a fuel presure test to see if the fuel pump is working properly, you can also run a timing chain text ,this is a little complicated but you may be able to do it , take the distribuitor cap off,with a ratchet turn the crankshaft back and faward,if the rotor takes to long to move the chain is worn out,this can cause loss of power, I hope this will help.........

Posted on Aug 24, 2008

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