SPONSORED LINKS

Idle flucuation

Tiny
RALPH001
  • MEMBER
  • 1995 CHEVROLET TRUCK
  • 5.7L
  • V8
  • 4WD
  • MANUAL
  • 200,000 MILES
When engine is at idle it fluctuates between 600 and 800 rpm, going up and down. Use to be steady at 600.
Tuesday, January 24th, 2017 AT 3:52 AM

3 Replies

Tiny
STEVE W.
  • MECHANIC
  • 13,573 POSTS
Clean the throttle body and around the throttle blade. Clean the IAC (idle air control) passages out as well. Do not be surprised if yours is dirty like this.

Throttle body cleaning.
https://www.youtube.com/watch?v=Xnm9HWSzJ2E

Refer to the picture for the IAC passage.
Image (Click to make bigger)
Thumb
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
+1
Tuesday, January 24th, 2017 AT 5:06 AM
Tiny
RALPH001
  • MEMBER
  • 2 POSTS
Thank you Steve W.
Was this
answer
helpful?
Yes
No
Tuesday, January 24th, 2017 AT 5:37 AM
Tiny
STEVE W.
  • MECHANIC
  • 13,573 POSTS
No problem, reply back once you get it cleaned. It should do the trick (95% of the time) but it could be something else as well.
Was this
answer
helpful?
Yes
No
Tuesday, January 24th, 2017 AT 6:57 AM

Please login or register to post a reply.

Related Engine Hesitate Content

Vacuum Leak Test and Repair
VIDEO
Vacuum Leak Test and Repair
Instructional repair video
Hesitation
GUIDE
Hesitation
An engine hesitation is an interruption of continuous power during acceleration. When a engine is hesitating it will cause the car to lunge or surge which will cause a...
VIEW MORE

Sponsored links