Cadillac proformance PLEASE HELP!

APH3AT

MEMBER
2000 CADILLAC DEVILLE
V8
FWD
AUTOMATIC
140,000 MILES

I have a 2000 cadillac deville. I was driving it and it suddenly lost power and wouldn't go over 30 mph. So I went to pull over and it died as I was pulling over. Then I started it bacc up and drove back home. Like a half a mile (engine was still struggeling) and it died again when I was pulling in my parking spot. But starts right up and seems to idel good. There was a little smoke comming from the opposite side of the pullies in the engine compartment. (Jus a small amount of smoke) I didnt hear any knoccing or anything during any of this. What could it be? Spark plugs, Fuel injecters? It seems 2 be gas or oil related

Sunday, February 13th, 2011 AT 6:26 PM

1 Reply

FACTORYJACK

MECHANIC
4,159 POSTS

You could have a restricted catalytic converter. Try pulling one of the oxygen sensors before the catalyst and drive it. If the power is restored with the extra exhaust that can pass out the sensor port, it indicates the exhaust may be restricted, and the most common point is the converter. It can idle somewhat normally, because the airflow may be enough to sustain an idle.

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Saturday, February 19th, 2011 AT 6:51 AM