Wrangler 4.2L Timing Issue - 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 12-01-2013, 09:56 AM   #1
Jeeper
 
Join Date: Oct 2012
Location: Hamilton Ohio
Posts: 19
Wrangler 4.2L Timing Issue

I recently got rid of the Carter BBD carb on my 4.2l and put the Weber 32/36 DGVE carb on... I am having issues with getting the timing set right... I put it at the 9 degrees that it supposed to be set at and it still runs rough any suggestions?

Wrangler1987 is offline   Quote
Old 12-01-2013, 10:28 AM   #2
Jeeper
 
roadyrob's Avatar
 
Join Date: Apr 2012
Location: west palm fla
Posts: 1,154
I prefer to time an older motor with a vacuum gauge. if your timing chain is worn it can throw the timing off by quite a bit, the vacuum gauge sets the timing to the motor.
plenty of info on the net to explain how.

roadyrob is offline   Quote
Old 12-01-2013, 10:35 AM   #3
Jeeper
 
Join Date: Oct 2012
Location: Hamilton Ohio
Posts: 19
motor has been totally redone... timing chain and gears are new.... would a HEI distributor help?
Wrangler1987 is offline   Quote
Old 12-01-2013, 11:51 AM   #4
Jeeper
 
roadyrob's Avatar
 
Join Date: Apr 2012
Location: west palm fla
Posts: 1,154
IMO the HEI is about the best ignition you can run in a 4.2. I've had mine for over 5 years with 0 problems. CRT performance sells a very good one, be sure to get the plug wires too, yours wont work. stay away from the cheap ebay ones they are mostly junk,
roadyrob is offline   Quote
Old 12-01-2013, 12:31 PM   #5
Jeeper
 
Join Date: Oct 2012
Location: Hamilton Ohio
Posts: 19
Ok thanks for the info.... would the timing degree be the same?.... or still use the vacuum gage to time it?
Wrangler1987 is offline   Quote
Old 12-01-2013, 05:03 PM   #6
Jeeper
 
c5wagner's Avatar
 
Join Date: Apr 2013
Location: Reno, Nevada
Posts: 1,469
Are you disconnecting the vacuum advance and plugging it when adjusting the timing? Could try bumping your timing up to 10-11 degrees depending on your elevation. Could also be bad valve timing
__________________
1989 Base YJ, 4.2l, Motorcraft 2150 carb, CRT HEI ignition, ax15, np231 JB conversions SYE, D30 ARB & Ford 8.8 ARB 4.56, 35x12.5r15 Goodyear MTR's, bds 3.5" springs, 1" body lift, and 1/2" Boom Shackles.
Build Thread: http://www.wranglerforum.com/f330/fi...ld-385106.html
c5wagner is offline   Quote
Old 12-01-2013, 06:10 PM   #7
Jeeper
 
Join Date: Aug 2011
Location: north of St.Franisville La.
Posts: 2,632
Send a message via Yahoo to Nubby55
Quote:
Originally Posted by c5wagner View Post
Are you disconnecting the vacuum advance and plugging it when adjusting the timing? Could try bumping your timing up to 10-11 degrees depending on your elevation. Could also be bad valve timing
I run my 4.2 @12 BTDC and I use a none computer Carter BBD and it run Great.
I would check my Firing Order and check for vacuum leaks also. then check timing chain valve timing if all else is good, {plugs, plug wires, coil output, compression ect.}.
Nubby55 is offline   Quote
Old 12-02-2013, 04:28 PM   #8
Jeeper
 
Join Date: Oct 2012
Location: Hamilton Ohio
Posts: 19
Timing chain and gears are new.... and yes i unplugged the vacuum advance and then plugged the vacuum line.... how do u check valve timing?
Wrangler1987 is offline   Quote
Old 12-02-2013, 05:06 PM   #9
Jeeper
 
c5wagner's Avatar
 
Join Date: Apr 2013
Location: Reno, Nevada
Posts: 1,469
Quote:
Originally Posted by Wrangler1987 View Post
Timing chain and gears are new.... and yes i unplugged the vacuum advance and then plugged the vacuum line.... how do u check valve timing?
I'd try advancing the timing to 10-12 first and see how that works first

__________________
1989 Base YJ, 4.2l, Motorcraft 2150 carb, CRT HEI ignition, ax15, np231 JB conversions SYE, D30 ARB & Ford 8.8 ARB 4.56, 35x12.5r15 Goodyear MTR's, bds 3.5" springs, 1" body lift, and 1/2" Boom Shackles.
Build Thread: http://www.wranglerforum.com/f330/fi...ld-385106.html
c5wagner 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 01:06 PM.


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