1999 Pontiac Grand Am vacuum

1999 PONTIAC GRAND AM
142,000 MILES • 6 CYL • FWD • AUTOMATIC
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DISZMR
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  • 1 POST
pontiac 3.4, there is a vacuum line going from the pcv valve to the throttle body and then on to a sensor or something, on the back of the engine, right below the map sensor. I found this vacuum line unplugged from the sensor. When I plug it in, the car dies. What is this sensor and what does it control? It has two vacuum lines going to it and is plugged in to a connector.
Feb 14, 2009 at 2:53 PM
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MMPRINCE4000
  • ✓ASE Certified Mechanic
  • 8,548 POSTS
  • ASE Certified Mechanic
Might be EGR valve. See if this sensor connects to exhaust and the to intake, that would be EGR, and if malfunctioning, it will kill engine.
Feb 18, 2009 at 8:56 AM
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