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Topic Review (Newest First)
12-02-2013 05:06 PM
c5wagner
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
12-02-2013 04:28 PM
Wrangler1987 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?
12-01-2013 06:10 PM
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.}.
12-01-2013 05:03 PM
c5wagner 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
12-01-2013 12:31 PM
Wrangler1987 Ok thanks for the info.... would the timing degree be the same?.... or still use the vacuum gage to time it?
12-01-2013 11:51 AM
roadyrob 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,
12-01-2013 10:35 AM
Wrangler1987 motor has been totally redone... timing chain and gears are new.... would a HEI distributor help?
12-01-2013 10:28 AM
roadyrob 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.
12-01-2013 09:56 AM
Wrangler1987
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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