Re: cold start problems - 9-3 - Saab 9-3SS Bulletin Board - Saabnet.com
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Re: cold start problems - 9-3
Posted by Ron (more from Ron) on Wed, 23 Jan 2008 05:43:20
In Reply to: cold start problems - 9-3, JToronto, Tue, 22 Jan 2008 18:16:41
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It sounds like one or more fuel injectors stuck open after you turned the engine off and drained-off the fuel pressure into one or more cylinders. The injectors could have stuck open due to impurities in the fuel. Don't forget that the only way the computer knows that they is too much fuel going into the engine is from the O2 sensors in the cat. And this only occurs when the engine is warm and the system goes into closed-loop mode. What bothers me is that you saw blue smoke. Blue smoke is usually caused by oil, black smoke is caused by gas and white smoke (or steam) is caused by water, antifreeze or condensation in the engine/exhaust... Ron
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