Question about 1992 Cadillac DeVille

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I have a 92 seville sts 4.9 runs good sometimes and thenif i let idle it starts to run like **** no power and backfires plus chews up the gas real quickly thought it was the cadilactic converter because that was red hot so i punch that out but car still running like **** here and there any ideas thanx

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This Engine IS NOTORIOUS For the "THROTTLE BODY & EGR VALVE CLOGING up with Carbon and it Requires Removal and CLEANING the Carbon from INTAKE and SAID PARTS + Gasket replacment & Vacuuming OUT ALL Carbon form INTAKE MANIFOLD. A FEW Hours Labor and Gaskets for SAID Parts is all it takes.
Hope this Helps you here, RejakWilson

Posted on Sep 30, 2009

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Unfortunately, that 1992 engine has had numerous problems. the heads make it overheat quite often. that is why they replaced it with the 4.6 NORTHSTAR engine in an attempt to improve that crappy engine...

Posted on Oct 04, 2009

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Posted on Oct 31, 2009

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Check engine light flashing check engine soon smell of gas and not running smouth

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Many things could be causing your vehicle to act like that. When parked for a while, mice sometimes make a home in the car and chew wires for a food source. Second, the moisture may have gotten to your spark. Check all your plug wires and cap/rotor for breaks or build up. It sounds like your car is either lacking in spark, or fuel. Turn the key on and have someone listen to the gas tank to hear if the fuel pump kicks on. If no sound, or weak scratchy sound, your pump is shot. Complete tune-up and fresh gas is a plus. Good luck.

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Just bought a 93 Seville STS about a month ago, which ran great the first few weeks. But now, when i'm driving, it stalls & sputs like it's running out of gas even though the tank is full. When...

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92 Cadillac STS Seville starts to lose power and backfire after driving 5 to 6 miles

Based on the information provided, it may be the catalytic converter. Your car is exhibiting some of the symptoms. Another symptom is extreme heat coming from the unit which can usually be felt through the floorboards. A trip to the muffler shop for a free check would be the next place to go. If the CC checks out fine, you could have any number of issues including a bad computer, plugs, wires etc.

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I need help getting my car started after running out of gas

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Jul 06, 2009 | 2000 Cadillac Seville

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