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Old 07-11-2009, 04:07 PM
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tblake tblake is offline
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Re: 03 grand prix loss of power

x2 on the converter. Rent a vacuum guage, hook it up to non ported engine vacuum. At idle your car should read about 16 inches of vacuum and hold steady. Increase the RPM to 2000 and hold steady. Vacuum at this point should also remain steady. If it drops, your converter is suspect.
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