Question about 1999 Cadillac Seville

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1999 Cadillac STS

For some reason my STS just started dying on me when im sitting at a stop light, then it will restart right back up for me. As long as i'm giving it gas it runs good. It has the same problem when im backing out of parking spots, the car will just die anybody had this problem before?

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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

Posted on Nov 04, 2008

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First u have to ask yourself what type of maintenance have u done via fuel filter ect,,get presure on rail check if it does not read right check regulator if you here an irreguler humm from your fuel pump will usually give you warnnin it is going out with change of this filter. I recomend!!!change the regulator with this repair.

Posted on Nov 04, 2008

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