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.
ALSO The CAT CONVERTER MUST BE REPLACED For "PROPER" Engine Performance.
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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ODOMERDER , FEUL, HEATER , LCD LIGHTS COMES ON , WHEN I START THE CAR THEN OUT

Posted on Oct 31, 2009

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