Hi guys!

I have just purchased a 98 XJ classic. It has the 4.0 engine. The check engine light is on, and the code reader only showed one code, that indicated the fuel pressure regulator has a problem. I am trying to borrow a code reader to get the exact code number of what the problem is, as I did not write it down.

Has anyone else had this problem before? Was it really the fuel pressure regulator? From what I have read, it sounds like the regulator is located inside the gas tank alongside the fuel pump. Does that sound correct?

thanks in advance from a new first time Jeep owner!

 

The XJ Cherokee PCM does not monitor fuel pressure. I think the Grand Cherokee does. Fuel pressure problems could trigger an emissions related code however.

A different code reader configured for the XJ Cherokee should be used.

 

If I could get the exact code # would that help? The engine seems to run fine. However I am about to take the Jeep through state inspection and am not sure if the check engine light will make it fail.

 

In most States requiring an inspection, a CEL will fail the inspection straight up.

The exact code number will help.

 

I replaced the gas cap and had no CEL all the way to the inspection station...almost. half a mile before I got there if came back on. I will try to get the code when it comes back from inspection. They wanted $80 just to read the code so I told them no thanks.

 

So just to update; whatever this code never came back after the new gas cap.