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Why does my RPMs keep jumping up and down while driving manual

RPMs jump up and down while driving even if I'm not switching gears why is that

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What is the year, make and model of the vehicle?

Does it do this when the engine is idling?

There are a lot of reasons that can cause engine"surging".

It could be in the fuel system, for example a clogged fuel filter or faulty fuel pump.

If the vehicle has an ODBII port get it scanned for codes as they will tell you what's going on


Its a 2006 Cadillac CTS manual 6speed


It's a 1995 Chevy Lumina 3.1 liter car


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Get the OBDII port scanned for codes first.

Apparently AutoZone in the USA will do this for free.

If there are any codes it will possibly help narrow down the problem.

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