4.2

  1. W

    New Cam, Timing Chain & Head. #1 No Compression

    Greetings. I have a 1989 YJ 4.2 L with TBI. It was my daily for about 2 years, the. I had it shipped. Jeep didn’t run right, I think the distributor moved somehow and I bent a few valves and pushrods. Head removed, took to the machine shop. All new valves installed. I also swapped the camshaft...
  2. DylanB

    89 YJ won't start

    Hey I was wondering if anyone could help me on my 89 with a 4.2 6 cyl. I drive it daily and the other day it started topping out at about 50 mph in 5th gear but I made it home. The next day I made it about a mile and it took a poop on the side of the road. I checked my spark on all plugs and...