Question about 2001 Cadillac Sts

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2001 Cadillac Sts: engine will die while idoling and sometimes while im driving...it also bogs down when driving and the service engine light will appear and b4 i can get it checked the light goes off..what can cause this?

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First item that I would check is the idle control valve. you can increase the idle speed of your engine if it runs below normal. Since you get a check engine light, I would suggest to get the error code.

Posted on Jun 04, 2009

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I have a 2001 Seville STS and it used to do the same exact thing. I would be sitting at a red light and it would shut off. The I had to have the upper and low crank shaft replaced and it's been 100% shut off free. I had both the upper and lower replaced b/c it was hard to tell exactly which one and it was just easier to have both brand new. I later found some info that stated the crankshaft replacement is a common problem with this car model. Good luck..they are pretty and fun to drive but man they are testly at times..

Posted on Nov 03, 2011

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2003 Cadillac cts service idle control reduce engine power


I have 03 cts and service idol control shows when I start the car sometimes and sometimes comes on while driving. I had everything cleaned and everything was good for a week then the engine light would go on and off, I think I may need a new sensor for the idol control or replace it. My question is if I keep driving it will it effect anything else ?

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1999 Cadillac STS


Here is the most common cause of this stall, it is the idle speed control air-bypass valve and throttle valve, they get full of gunk over the miles and cause idle issues (stalls) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake

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