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Question posted by seventh011 on May 15th, 2016

What Keeps Buick 3800 From Revving Past 3500 Rpm?

I have a 1995 Riviera with the supercharged 3800. Starts and runs fine but when I get to 3500 rpm it will drop 500 rpm, rev, drop, rev, drop, repeatedly. I've changed the TPS, MAF and ECU with no change. Any experience with this?

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Answer #1: Posted by waelsaidani1 on May 16th, 2016 9:29 AM

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waelsaidani1

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the limiter is set to 4200 RPM when in not in drive. In 1st gear it will also cut off as a safety measure around 3500rpm.

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