Vehicle runs fine with at least a little throttle but runs rough at idle.

Tiny
FLYNPA
  • MEMBER
  • 1985 NISSAN TRUCK
  • 150,000 MILES
My friend's son drives a 95 nissan truck to high school. He says that it runs fine with a little pedal but runs really rough at idle. I don't know much about this. He did ask if a disconnected vacuum line could cause it. I am gonna look at it tomorrow. Any suggestions?
Saturday, December 10th, 2011 AT 12:39 AM

1 Reply

Tiny
RIVERMIKERAT
  • MECHANIC
  • 6,110 POSTS
Yes, it sounds definitely like a vacuum leak. Use a can of Berriman's Carb and Choke cleaner. Spray it over the vacuum lines and fittings to locate the leak. The idle will change when the leaking part is sprayed.
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Saturday, December 10th, 2011 AT 1:04 AM

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