2003 Gmc Savana Replaced New Oem Parts Thethrottle Body Which Includes Idle Air

2003 GMC SAVANA
35,000 MILES
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we have replaced with new OEM parts- thethrottle body which includes the idle air control valve and the tp sensor on this 3500 series truck/van and now the engine runs away (fast idle).

Before replacing these parts the engine idle too low.

What could be doing this?

Thank you
Jan 10, 2013 at 11:28 PM
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ASEMASTER6371
  • ✓ASE Certified Mechanic
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vacuum leak, re check your work to be sure the throttle body is properly mounted.

did you replace the gasket??

Roy
Jan 10, 2013 at 11:38 PM
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