Recent content by Mgrantham

Crawldaddy, I did check the fuel pressure. Its a few comments back. It was about 40 with key on. With the engine running we were at 48 or 50. As far as I know the fuel pressure regulator is on the fuel pump along with the fuel filter in the gas tank. Would a dying alternator give up the same...

I was under the impression that heat soak is only the rough idle during start up when engine is hot. Does heat soak also include highway driving? I also already have the heat foil but not the injector sleeves. I can't tell if the header is cracked, however when I did some seafoam I didn't...

Update: Checked the compression on all cylinders. Cylinder 1- 170 Cylinder 2- 155 Cylinder 3- 155 Cylinder 4- 155 Cylinder 5- 160 Cylinder 6- 160

Update: Rented a fuel pressure regulator. It doesn't seem to do much by just turning the key on. But I can start it and it jumps up to 50. Turn it off. It bleeds off to about 40. Turn the key on without starting and it jumps up to 50 and begins bleeding off on its own. After letting it run and...

Correction! My dad reminded me that we did in fact do a vacuum test. It was at 14 or so before cleaning the intake and 15 or so after.

Ok lets see if I can respond to some of these replies. DerMeister, there is 105k miles on it. I haven't checked into re-indexing my CPS but I am familiar with changing them from and older jeep and have begun thinking that perhaps CPS is an issue here. I will look at your link. BirchlakeXJ...

Also, here are the link to the service bulletin I mentioned. http://www.wjjeeps.com/tsb/tsb_wj_0900303.pdf

I will check that. In the meantime, here's what I've found. Opened up the butterfly valve at the air intake and it was caked with sludge. Cleaned it out with some cleaner, and still plan to do some sea foam to it. Found a fix from the dealership that explains what issues I've been having...

Update: Changed the plugs to some autolites, added some seafoam to the tank, changed the ignition coil and reset the code. I drove it for about 100 miles and it coded with P0300, P0304 and P0305 about half way through. Any ideas? I really need to fix this.

Hey guys. Having some trouble understanding what's going on with my jeep. 2001 XJ, 4.0, 4WD, 33" tires, about 7" of lift. Today driving up from Phoenix to Flagstaff my check engine light came on. Pretty soon it started blinking at me. :shocked: The jeep is running fine, but I've never seen...