Now, that may be an idea. Still, I think the fuel pump would last longer than 75K miles. What all does it involve to test the fuel pressure.

 

Getting a gauge and screwing it in to the test port on the side of the fuel rail.

 

Yeah to compare thats the stock size on a 96-98 grand cherokee limited.

 

it is way to small. I need to check my fuel pressure as well....

 

The thing that looks like a Valve Stem on a tire?

 

Yes.

 

My truck came with 245's. Its on the build sheet and the door sticker. My speedometer was off 3-4mph until I recalibrated to a 30" tire. So if thats what the factory calls calibrated, they have some serious faults with their system.

 

You alll think you have it bad. I bought my 2wd Dodge a few weeks ago with 305-70/16 Goodyear Wrangler RT/S tires on it. The door sticker has the 225 size on it. I know the speedometer is way off by the cop that pulled me over for doing 72mph in a 65mph zone. I had the cruise control set at exactly 65mph according the the speedometer. He let me off with a warning. How lucky was I? How am I supposed to figure the mileage on something like that?

 

last time i came across that low mileage, was on cuz a clogged injector. but in your situation, i wouldnt say its the cat. im a state inspector and even if your o2's were'nt functioning correctly, the computer would throw a code showing a system bank malfunction or something along those words. clean out intake manifold and clean fuel system and injectors. ( seam foam works good). go to any lube shop. they should be able to do it unless you want to.

try that. may work.

 

Ok, I have used Seafoam before. Guess I need to use it again. I changed out the distributer and rotor today, and used the Napa Echlin one that was reccomended. here is a pic of the old one:



Its pretty worn out. So, with that and driving easy, that should help.