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1998 Chevy Truck

Tiny
TROHLFS
  • MEMBER
  • 1998 CHEVROLET TRUCK
  • V8
  • 4WD
  • AUTOMATIC
  • 158,000 MILES
ENGINE IDLES VERY ROUGH AROUND 2000 RPM. It feels almost like the engine is searching for the right rpm, it drops about 3-500 rpm then goes right back to the proper rpm. Just replaced the rotar and cap, and spark plugs.
Saturday, February 28th, 2009 AT 1:03 PM

1 Reply

Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
Take off the IAC (idle air control) module and clean it with qd contact cleaner on around the pintle. Make sure the pintle moves freely. Also 2000 rpm is kinda high, make sure the throttle body is clean and closing all the way and there is no vaccum leaks.
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Monday, March 9th, 2009 AT 11:18 PM

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