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I had a similar problem. Turned out to be a bad solenoid on the fuel injector. Required the replacement of the entire fuel injector. After that, the problem was solved.

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βˆ™ 14y ago
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βˆ™ 7mo ago

A jumpy RPM gauge on a 1995 GMC Sonoma could be due to a faulty RPM sensor or a loose electrical connection. It can also indicate a problem with the engine such as misfiring or issues with the ignition system. It is recommended to have the vehicle inspected by a mechanic to diagnose and fix the issue.

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Q: Why would the RPM gauge be all jumpy on a 1995 GMC Sonoma?
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