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Engine rev and idle

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Hi, we have a DODGE RAM 1500, 5.7l engine with edelbrock supercharger, when we turn on the ignition and car fires up sudeenly revs go up to 2500 rpm and later to 4000 rpm without pressing the pedal. Any idea whan might be wrong?

Without knowing more about the engine, I'd be looking for a significant air leak post throttle body or a problem with the dbw throttle body.

Without knowing more about the engine, I'd be looking for a significant air leak post throttle body or a problem with the dbw throttle body.

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