Notices
General Tech Good at troubleshooting? Have a non-specific issue? Discuss general tech topics here. IF YOUR QUESTION IS SPECIFIC TO A CERTAIN MODEL, IT DOES NOT GO IN THIS SECTION.

91 2500HD Pickup Idle Problem.

Thread Tools
 
Search this Thread
 
Old July 2nd, 2009, 8:39 PM
  #11  
Super Moderator
Professional Mechanic
 
MDTAHOE's Avatar
 
Join Date: Nov 2008
Location: Bowie, MD
Posts: 2,950
Likes: 0
Received 3 Likes on 3 Posts
Default

Put a vacuum gauge on the engine if it read between 18-21 and is steady your timing chain is good. Or pull the dis cap off and turn the crank while looking at the rotor. If you can move the crank back and forth with no movement of the rotor the chain has to much slack. Set the engine up on tdc and make sure the rotor is pointing at #1 on the cap
Old July 2nd, 2009, 8:51 PM
  #12  
CF Beginner
Thread Starter
 
Silkeeks's Avatar
 
Join Date: Jul 2009
Posts: 9
Likes: 0
Received 0 Likes on 0 Posts
Default

No, I might not be allowed I just joined today. But, I know which one you are talking about now. I will let you know how it goes. Thanks a lot for your time.
Old July 2nd, 2009, 8:59 PM
  #13  
Super Moderator
 
suzuki-guy's Avatar
 
Join Date: Mar 2009
Location: Michigan
Posts: 1,636
Likes: 0
Received 2 Likes on 2 Posts
Default

No problem!
Old July 2nd, 2009, 10:00 PM
  #14  
CF Beginner
Thread Starter
 
Silkeeks's Avatar
 
Join Date: Jul 2009
Posts: 9
Likes: 0
Received 0 Likes on 0 Posts
Default

Another thing I noticed is that I can smell some exhaust up by the engine. I don't have a leak anywhere do you think a bad O2 sensor could be causing the exhaust to run back up through the Throttle body?
Old July 2nd, 2009, 10:05 PM
  #15  
Super Moderator
 
suzuki-guy's Avatar
 
Join Date: Mar 2009
Location: Michigan
Posts: 1,636
Likes: 0
Received 2 Likes on 2 Posts
Default

Do me a favor hit your catalytic converotr can you here a rattle? YOu might have a clogged cat. An o2 sensor would throw a code.
Old July 3rd, 2009, 11:28 AM
  #16  
CF Beginner
Thread Starter
 
Silkeeks's Avatar
 
Join Date: Jul 2009
Posts: 9
Likes: 0
Received 0 Likes on 0 Posts
Default

Hmm. I don't see why the cats could be clogged. It is a custom system made from my shop about 2 yrs ago. Its a Y pipe Separating two cats then going back to a single pipe into the muffler.
Old July 3rd, 2009, 12:26 PM
  #17  
CF Beginner
Thread Starter
 
Silkeeks's Avatar
 
Join Date: Jul 2009
Posts: 9
Likes: 0
Received 0 Likes on 0 Posts
Default

There is a Plug that I see when I take my glovebox out it looks like this like black box with like a chip in it and a red black and tan wire coming off. Is that what you are talking about?
Old July 3rd, 2009, 5:04 PM
  #18  
Super Moderator
 
suzuki-guy's Avatar
 
Join Date: Mar 2009
Location: Michigan
Posts: 1,636
Likes: 0
Received 2 Likes on 2 Posts
Default

YOu do not have to take the glovebox out to get to this wire! If you give me your email I can email you the picture!
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
epagidas
S-10 & Blazer
16
December 9th, 2023 8:58 PM
Sethyates72
Cavalier
0
February 1st, 2014 7:53 AM
C-Douglas
S-10 & Blazer
0
September 12th, 2011 11:50 AM
Thermool
Silverado & Fullsize Pick-ups
4
June 20th, 2009 6:41 PM



Quick Reply: 91 2500HD Pickup Idle Problem.



All times are GMT -5. The time now is 12:54 AM.