Jeep dying when as let off - 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 08-15-2014, 08:41 PM   #1
Jeeper
 
Jevenson's Avatar
 
Join Date: Mar 2014
Location: Georgia
Posts: 186
Jeep dying when as let off

Today I was driving home and Jeep was running perfect. I came to a stop sign and all power cut off. Turned out alternator was shot. Replaced it and now when I start it up, it has a knocking sound and when I let off of gas it dies. I have a video, but I don't know how to upload it.

Jevenson is offline   Quote
Old 08-15-2014, 08:43 PM   #2
Jeeper
 
Jevenson's Avatar
 
Join Date: Mar 2014
Location: Georgia
Posts: 186
Oh yeah. 4.2 and automatic transmission

Jevenson is offline   Quote
Old 08-15-2014, 09:38 PM   #3
Jeeper
 
DREDnot's Avatar
 
Join Date: Jul 2014
Location: Phoenix, AZ
Posts: 441
Put a long screwdriver to the alternator case and put your ear on the handle to see of the knocking is coming from the new alternator. If so, you may have gotten a bed replacement unit.
__________________
'91 YJ Sahara 4.0L/AX-15/NP231, D30/D35 @3.07
'12 KK Cherokee 3.7L/42RLE/MP1522, D30M/8.25 @3.73
"Non vi sed, Arte"
DREDnot is offline   Quote
Old 08-15-2014, 09:51 PM   #4
Jeeper
 
Jevenson's Avatar
 
Join Date: Mar 2014
Location: Georgia
Posts: 186
Would it be knocking super hard if that was the case. Also is there a site that I can load the video and put a link on here to it if that helps anyone. I know I don't have much info, but it never knocked until new alternator went on.
Jevenson is offline   Quote
Old 08-16-2014, 08:35 PM   #5
Jeeper
 
Join Date: Aug 2011
Location: north of St.Franisville La.
Posts: 2,513
Send a message via Yahoo to Nubby55
pull the belt off the Alt. and start it and see if it still knocks, don't run it so long that you run it hot, but should be able to check it out pretty fast.
__________________
The Government can not give anything to anybody that it does not first take from someone else !
Nubby55 is offline   Quote
Old 08-17-2014, 04:33 AM   #6
Jeeper
 
DREDnot's Avatar
 
Join Date: Jul 2014
Location: Phoenix, AZ
Posts: 441
That's a good idea.

Also, Give the alternator pulley a spin by hand and see if its hitting internally
__________________
'91 YJ Sahara 4.0L/AX-15/NP231, D30/D35 @3.07
'12 KK Cherokee 3.7L/42RLE/MP1522, D30M/8.25 @3.73
"Non vi sed, Arte"
DREDnot is offline   Quote
Old 08-17-2014, 08:49 AM   #7
Jeeper
 
Jevenson's Avatar
 
Join Date: Mar 2014
Location: Georgia
Posts: 186
http://youtu.be/LKQ-nCyO1bw. Don't think it's alternator
Jevenson is offline   Quote
Old 08-17-2014, 04:14 PM   #8
Jeeper
 
DREDnot's Avatar
 
Join Date: Jul 2014
Location: Phoenix, AZ
Posts: 441
Gah! That's a lot of blowby. You need to do a compression test, first thing. And look at your plug condition.

__________________
'91 YJ Sahara 4.0L/AX-15/NP231, D30/D35 @3.07
'12 KK Cherokee 3.7L/42RLE/MP1522, D30M/8.25 @3.73
"Non vi sed, Arte"
DREDnot 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




Download our Mobile App

» Featured Product

All times are GMT -5. The time now is 01:37 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