Question about 2000 Pontiac Montana

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My wifes 2001 montana surges sometimes while driving or when starting up. I can sto the engine and it will go back to a normal idle speed. It surges randomly up to between 2000 to 3000 rpms. Then after turning the vehicle off, it will 'reset' to approx. 600 rpm. Is this anything to do with a 'throttle position sensor' or an idle control sensor??? Glenn

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Its the tps

Posted on May 05, 2010

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