The engine revs

Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
Check the PCM ground strap on the cylinder head, some have it at the front, some at the rear, remove the wire and clean the connecting spot and the eyelet of the wire, put it back together and seal with RVT.
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Tuesday, August 1st, 2017 AT 10:22 AM (Merged)
Tiny
BUMBLEBEE57
  • MEMBER
  • 1 POST
  • 1999 GMC JIMMY
  • 4.3L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 161,000 MILES
While driving on a straightaway in cruise I will notice a feeling that the engine revs just slightly from time to time. The car does not slow or anything but it just feels like the tranny is going into neutral for just a bit then reengaging. When I take it out of cruise it does just fine that I can tell.
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Tuesday, August 1st, 2017 AT 10:22 AM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Have a trasn guy check this it may be the converter clutch is going bad or a fluid change
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Tuesday, August 1st, 2017 AT 10:22 AM (Merged)
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Auto or Manual trans?
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Tuesday, August 1st, 2017 AT 10:22 AM (Merged)
Tiny
BRIAN16041
  • MEMBER
  • 1 POST
  • 1995 GMC JIMMY
  • 1.0L
  • V8
  • 4WD
  • AUTOMATIC
  • 179,000 MILES
What could cause it to idle at 2000 rpm when first started and stay there?
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Tuesday, August 1st, 2017 AT 10:23 AM (Merged)
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
1800-2000 rpm

Roy
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Tuesday, August 1st, 2017 AT 10:24 AM (Merged)
Tiny
GRR2012
  • MEMBER
  • 1 POST
  • 1999 GMC JIMMY
  • 132,000 MILES
About 1 month ago, my car started to slip out of 1st gear when starting out. I have to double clutch to get it to stay in 1st (works most of the time). Last night, it started to rev in high rpms as soon as I tap the accelorator. I can not get over 10 mph with out it being between 2500 and 3000 rpm. When I shift into 2nd, it will drop to 1500 rpm then immediately jump to 3000 rpm. I attempted to go up a30-40% incline for approx 40ft and could not make it up the incline. The car feels like it is dragging all the time, and I am unable to get over 55-60mph

I dont trust mechanics in my area. How can I figure out what the problem is for sure before taking it to a mechanic
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Tuesday, August 1st, 2017 AT 10:24 AM (Merged)
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Your clutch is slipping and most likely has to be replaced.

Roy
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Tuesday, August 1st, 2017 AT 10:24 AM (Merged)
Tiny
CHRIS7220
  • MEMBER
  • 1 POST
  • 1996 GMC JIMMY
Engine Mechanical problem
1996 GMC Jimmy 6 cyl Four Wheel Drive Automatic 188*** miles

When my jimmy gets to 4500 rpm the headlights dim and battery voltage bottoms out, and I have no idea what could cause this? Thanks for any help
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Tuesday, August 1st, 2017 AT 10:24 AM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
The computer autommatically shuts the fuel off at a certain rpm so you can't drive to fast or to stop damage to the engine.
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Tuesday, August 1st, 2017 AT 10:24 AM (Merged)

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