my cadillac CTS

2006 CADILLAC CTS
65,500 MILES • 6 CYL • 2WD • AUTOMATIC
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ALBERT CAPOBIANCO
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When I first start up my 2006 Cadillac CTS, the vehicle runs rough and I hear a rattling sound. After a while I drive the car and it seems find. There must be a problem, but I need some type of an answer before I bring it in to Cadillac for repairs.
Jun 4, 2011 at 4:03 PM
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HMAC300
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it could be a vacuum leak as the computer takes over when it's almost warmed up. check for a vacuum hose off or a split one or broken one. alot of them are plastick andcan be repaired at the break with a pieceo fhose going ove r it. The rattle may be the heat shield has broken loose over the converter. you'll have to crawl uner it and look.
Jun 4, 2011 at 11:14 PM