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Old 12-01-2013, 09:56 AM   #1
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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?

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Old 12-01-2013, 10:28 AM   #2
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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.

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Old 12-01-2013, 10:35 AM   #3
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motor has been totally redone... timing chain and gears are new.... would a HEI distributor help?
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Old 12-01-2013, 11:51 AM   #4
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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,
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Old 12-01-2013, 12:31 PM   #5
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Ok thanks for the info.... would the timing degree be the same?.... or still use the vacuum gage to time it?
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Old 12-01-2013, 05:03 PM   #6
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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
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1989 Base YJ, 4.2l bored .03 over, Borla exhaust, offy intake, Motorcraft 2150 carb (soon a howell TBI kit), HEI ignition, nv3550, nv241or with 4:1 low ,D44 with ox locker & Ford 8.8 with lsd both with 4.10 gearing, Skyjacker 4" Double wrap lift, and Boom Shackles.
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Old 12-01-2013, 06:10 PM   #7
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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.}.
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Old 12-02-2013, 04:28 PM   #8
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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?
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Old 12-02-2013, 05:06 PM   #9
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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

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1989 Base YJ, 4.2l bored .03 over, Borla exhaust, offy intake, Motorcraft 2150 carb (soon a howell TBI kit), HEI ignition, nv3550, nv241or with 4:1 low ,D44 with ox locker & Ford 8.8 with lsd both with 4.10 gearing, Skyjacker 4" Double wrap lift, and Boom Shackles.
Build Thread: http://www.wranglerforum.com/f330/fi...ld-385106.html
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