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WHEN I START THE TRUCK IT RUNS ROUGH UNTIL IT ...

  • Tiny
  • Anonymous
  • 1984 Nissan Truck
  • 260,000 miles

When I start the truck it runs rough until it warms up in 3-4 minutes and then it runs perfectly fine. It blows blue smoke out the tail pipe until it warms up. Why does it start rough?

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Sunday, December 2nd, 2012 AT 5:05 AM

1 Reply

  • Tiny
  • DrCranknWrench
  • Expert
  • 3,458 posts

I would check the Idle Aitr Control Valve, IACV. It is located aon the intake manifold near the throttle body and has and electrical connector.

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Sunday, December 2nd, 2012 AT 5:33 AM

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