Loss of power... - 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 05-25-2012, 01:57 AM   #1
Jeeper
 
Bluegrass's Avatar
 
Join Date: Nov 2011
Location: Louisville
Posts: 409
Talking Loss of power...

having some serious issues with a occasional loss of power with a sputtering but when I switch gears I can get the power back.

Really Killing me.. Not sure where to start... Fuel, Air, and Spark are the base issues that I look to but how to trouble shoot is what i really need to know.

Any help will be GREAT thank you BTW it is a 87 YJ with the 4.2

__________________
The Jeeps Shall Inherit The Earth..
Bluegrass is offline   Quote
Old 05-25-2012, 12:06 PM   #2
Jeeper
 
Bluegrass's Avatar
 
Join Date: Nov 2011
Location: Louisville
Posts: 409
Bump for help?

__________________
The Jeeps Shall Inherit The Earth..
Bluegrass is offline   Quote
Old 05-25-2012, 12:27 PM   #3
kik
Jeeper
 
kik's Avatar
 
Join Date: Dec 2008
Posts: 5,454
Images: 1
The usual suspects are spark; coil or Ignition Control Module, carb., or clogged fuel filter/bad fuel pump. I would change the fuel filter anyway and make sure you have spark, even though if it's the module it can be intermittent. When I had that problem I swapped out the coil and ICM. It was the module.
kik is offline   Quote
Old 05-25-2012, 09:54 PM   #4
Jeeper
 
Join Date: Jan 2012
Posts: 123
Had the same issue mine was a old fuel pump giving up on me
The youngin and jeeper is offline   Quote
Old 05-25-2012, 11:54 PM   #5
Jeeper
 
Bluegrass's Avatar
 
Join Date: Nov 2011
Location: Louisville
Posts: 409
The filter is new, and its carb so no fuel pump that I know of..

Going to check the fuel and spark and air but it doesn't make since why this problem wouldn't be constant.
__________________
The Jeeps Shall Inherit The Earth..
Bluegrass is offline   Quote
Old 05-26-2012, 01:24 PM   #6
Jeeper
 
jfbilbro's Avatar
 
Join Date: Jul 2011
Location: Central Alabama
Posts: 769
The only way you won't have a fuel pump is if the gas tank is located higher than the carb......you have one, trust me
__________________
...huh?...
jfbilbro is offline   Quote
Old 05-26-2012, 01:32 PM   #7
2xs
Cali Smog Nazi.

WF Supporting Member
 
2xs's Avatar
 
Join Date: Jun 2011
Location: Santa Rosa, Ca.
Posts: 2,683
Images: 3
Quote:
Originally Posted by Bluegrass View Post
The filter is new, and its carb so no fuel pump that I know of..
Looks like its time to take your Jeep to a repair shop...

__________________
'93 Black YJ, 4.0L AX15 - UNDER CONSTRUCTION!
http://www.wranglerforum.com/f330/2x...ad-490865.html
'04 SV1000s:
http://www.svrider.com/forum/showthread.php?t=280873
Old Jeep that was totaled (and SOLD!):
http://www.wranglerforum.com/f330/2x...ad-101879.html
2xs is offline   Quote
Old 05-26-2012, 02:49 PM   #8
kik
Jeeper
 
kik's Avatar
 
Join Date: Dec 2008
Posts: 5,454
Images: 1
Quote:
Originally Posted by Bluegrass View Post
The filter is new, and its carb so no fuel pump that I know of..

Going to check the fuel and spark and air but it doesn't make since why this problem wouldn't be constant.
Chances are it's the Ignition Control Module acting up. Your fuel pump is mechanical on the passenger side of the engine compartment. You'll see it. Follow the fuel line from the carb. You should take it to a shop.
kik is offline   Quote
Old 05-29-2012, 12:29 AM   #9
Jeeper
 
Bluegrass's Avatar
 
Join Date: Nov 2011
Location: Louisville
Posts: 409
I am pretty sure I can do a fuel pump, just did a nutter bypass, fuel filter, distributor cap and rotor, now I guess I will change the plug wires and then attack the pump.. I had not looked into the pump due to a friend telling me that I didn't have one.

I am still learning on how to on my Jeep and I don't plan on paying someone else to do what i am able to do. Thanks for the advice on what to look for.

__________________
The Jeeps Shall Inherit The Earth..
Bluegrass is offline   Quote
Reply

Tags
4.2 , 87 wrangler , power issue , power loss , wranger

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 10:26 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