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Old 01-18-2008, 04:07 PM
Firstymer Firstymer is offline
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Exclamation Re: Troubleshooting codes P0650, P0449...

Well, I notice strong white smoke coming out of the exhaust and I also notice coolant loss in the rev. Any suggestions?

Quote:
Originally Posted by BNaylor
Photos? Not asking for much are you. It is up to the member weighing-in if they have any pics or tech procedures applicable to your engine and whether they have the time. Doing what was requested can be very tedious.

In the meantime, you can check fuel pressure DIY - (Do It Yourself) at the Schrader valve located at the rear fuel injector rail passenger side by the alternator and power steering pump. Use a standard auto fuel pressure tester. See pic below. Fuel pressure varies but look for something greater than 40 psi, preferably at least 48-55 psi.



As suggested monitor coolant level to help rule out possible flaky LIM gaskets which are a known issue on the 3.1L engine. An engine vacuum test may help. Always good to make sure engine vacuum ranges from 15 - 22 in-hg. You can use a standard 0-30 in hg auto vacuum tester connected at the lower intake manifold (LIM) vacuum ports.

On the crank sensors the main one is located behind the harmonic balancer located at the front crankshaft of the engine. The second 3X crank position sensor is harder to get to and located under the rear exhaust manifold on the engine block. You may need professional help to check and replace these items which could cause your symptoms (stalling). Do you ever get a SES/CEL light?
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