'91 4.0L intermittent sudden drop in RPM - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > YJ Jeep Wrangler Forum > YJ Tech Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 01-14-2010, 08:27 PM   #1
Newb
 
Join Date: Jan 2010
Location: Spotsylvania County
Posts: 2
'91 4.0L intermittent sudden drop in RPM

About 2 months ago, had a very intermittent hesitation (sudden drop in RPM) at 2000+ rpms and check engine light would come on intermittently as well. Replaced the plugs and wires and symptoms seemed to go away. Its been very cold here in central VA for the past month or so and decided to check the coolant level before leaving work yesterday. Once home, added water and coolant to the radiator and reservoir and ran the engine until warm to make sure a good mixture of old and new. The trouble started the next morning. Was very difficult to start, but got it running and off to work. A couple of minutes before arriving at work, intermittent hesitation came back, and check engine light back on. Ran the codes and got 12 (battery disconnected), 33 (A/C relay - no A/C in the Jeep), and 41 (Alternator field open or short). After work, hesitation was still there (check engine back on after a few RPM drop-offs) , but was able to drive most of the 35+ miles back home with no issues, but just before I got home, hesitation was back. Shut off engine and went to restart. Struggles to restart but can get it to start.

Very confused about the coincidence of bringing coolant level back to full and adding to reservoir and now all of a sudden this hesitation problem is back...

Any ideas???

__________________
Virginia Tech '87
Ut Prosim: "That I May Serve"
vthokie87 is offline   Quote
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
How much transfer case drop do I need. BARKDOG67 TJ Tech Forum 24 05-05-2014 07:12 PM
T-case drop kit, trim mudslinger150 TJ Tech Forum 6 10-19-2009 10:54 AM
sudden drop... crazyredneck TJ Tech Forum 7 03-09-2009 12:43 AM
intresting info on the 4.0L TB swap... foxinthemudd General Jeep Discussion 10 03-10-2008 11:37 PM
T-case drop removal GrnTJ TJ Tech Forum 5 10-01-2007 05:30 PM



Download our Mobile App

» Featured Product

All times are GMT -5. The time now is 02:47 AM.


User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2015 DragonByte Technologies Ltd.

Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC