Question about 1998 Chevrolet S-10 Pickup

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The tachometer jumps

Hi, I have a 2001 GMC Jimmy SLT 4.3l 4wd, I am experiencing a problem with the engine, right now as I drive, the tachometer will start to "twitch and jump" once I get to the 2000 rpm mark, the check engine light has come on with P0335 crankshaft sensor code, now have recently replaced the sensor and did not fix the problem, I’ve also completed some other work recently like new plugs, lower intake gasket, fuel pump, fuel filter and have changed the oil twice this month. The timing is dead on... but tryying to figure out other posibilites, mass air flow sensor? Clogged cat(hopefully not!) but if you have come across something like this it will be greatly appreciated!!

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Did you check the cam sensor? the cat? ae you loosing power at 2000 rpm?

Posted on Sep 30, 2009

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