Jeep Wrangler Forum

Jeep Wrangler Forum (http://www.wranglerforum.com/)
-   YJ Tech Forum (http://www.wranglerforum.com/f218/)
-   -   Wrangler 4.2L Timing Issue (http://www.wranglerforum.com/f218/wrangler-4-2l-timing-issue-415402.html)

Wrangler1987 12-01-2013 09:56 AM

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?

roadyrob 12-01-2013 10:28 AM

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.

Wrangler1987 12-01-2013 10:35 AM

motor has been totally redone... timing chain and gears are new.... would a HEI distributor help?

roadyrob 12-01-2013 11:51 AM

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,

Wrangler1987 12-01-2013 12:31 PM

Ok thanks for the info.... would the timing degree be the same?.... or still use the vacuum gage to time it?

c5wagner 12-01-2013 05:03 PM

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

Nubby55 12-01-2013 06:10 PM

Quote:

Originally Posted by c5wagner (Post 6497450)
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.}.

Wrangler1987 12-02-2013 04:28 PM

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?

c5wagner 12-02-2013 05:06 PM

Quote:

Originally Posted by Wrangler1987 (Post 6516322)
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


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