79 Jeep J10 tech question

mikecetj · #1 (**permalink**) 07-13-2008, 11:07 AM

My truck started running pretty rough and stumbling so i took a peek under the hood, found vacuum leaks. I replaced 90% of the vacuum lines, the fuel lines, fuel filter, air filter, accelerator pump (which was worn out) and tested the vacuum ported switch with a shot of gum cutter. There are currently no leaks in the vacuum system yet it still stumbles. I still have the original motorcraft 2 barrel and it is a bone stock rebuild with factory specs.

any advice for what else to check?

VeeDubb · #2 (**permalink**) 10-12-2008, 09:29 AM

Does it have a miss? Has it been running like this since the rebuild, or has it run fine after the rebuild?

Northman111 · #3 (**permalink**) 10-26-2008, 09:20 PM

Which engine do you have?? Six or eight. Either way sounds like you sucked up some gunk in the carb. ( Fuel side )

jaber · #4 (**permalink**) 11-01-2008, 04:06 PM

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You might check the shaft on the butterflies to see if its worn out.

ka041a · #5 (**permalink**) 11-26-2008, 02:25 PM

grab the carb and twist and wiggle it to see if it is loose from the manifold. also, one time i had the pcv hose burned through on the bottom side where i couldn't see or feel or hear it and i only found it when i tore the intake off. good luck, john

carnuck · #6 (**permalink**) 01-27-2009, 09:09 AM

Timing too far retarded or fuel too old will cause this (bad vacuum advance too)