Rough Idle @ 900 RPM Only – Please Help!
#1
Rough Idle @ 900 RPM Only – Please Help!
Got home from a trip today, when I pulled into the driveway I noticed the engine had a rough idle between 800 - 900 RPMs – just slightly above normal idle range. So after washing it I took it for a short run and really stepped into it a couple of times, which may have helped it very slightly, but not altogether. Except for the rough idle @ 8/9K RPM range (only), it seems to run fine.
The truck has a little over 75000 miles on it (almost all freeway miles). I never tow and I drive it fairly easy, except I will blow it out about once every 500 miles. I always average about 20.5 to 21 MPG (hand calc)… one or two MPG less in winter. I always add PS or Redline fuel conditioner to every tank. I service the truck myself every 7K miles (oil, oil and fuel filter, and usually the air filter too. Truck is all stock. I’m suspicious I may be developing an injector issue because last winter it started becoming more difficult to start when cold (20F to 30F ranges). Once in a while it will put out a little white smoke at cold start in mornings – but not all the time. Dealer did the flash for white smoke in 2006. Any ideas? Does this sound like injectors?
The truck has a little over 75000 miles on it (almost all freeway miles). I never tow and I drive it fairly easy, except I will blow it out about once every 500 miles. I always average about 20.5 to 21 MPG (hand calc)… one or two MPG less in winter. I always add PS or Redline fuel conditioner to every tank. I service the truck myself every 7K miles (oil, oil and fuel filter, and usually the air filter too. Truck is all stock. I’m suspicious I may be developing an injector issue because last winter it started becoming more difficult to start when cold (20F to 30F ranges). Once in a while it will put out a little white smoke at cold start in mornings – but not all the time. Dealer did the flash for white smoke in 2006. Any ideas? Does this sound like injectors?
Last edited by Al Ex; 11-30-2009 at 07:58 AM. Reason: corrections to data
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IF your not using a chip like the adrenalin or a smarty, i would think its your injectors. "madhat" has the right idea, wash some injector cleaner through it and see if that does anything.
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