4.2

Good afternoon all. I am looking for some opinions from folks who have experience with both the 4.2 and 4.0 or a good idea anyway. I presently have a 89 Jeep YJ with the 4.2. 98k on it. The carb is long gone - I have the Mopar MPFI kit installed (basically all the fuel...

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...

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...