Search results

I had been having a problem where I was only getting roughly 15-16mpg on the highway for the last few weeks, after replacing the pre cat O2 sensor everything is back to normal. Bought the Bosch OEM one and am now getting roughly 20-21mpg on the highway, might be a little but that equated to a...

Well I went ahead and decided to replace the O2 sensors after all I have 150k on the XJ and I am almost certain they are the factory originals....Question I have though is I pulled off the O2 sensor that is before the cat and noticed that there are small holes in the tip. In the new Bosch...

Your talking about the Jeep 2500.....the only thing that even makes that a jeep is the badge and the fact they bought all the tooling from ChryCo. If you goto the website you see that they say they are not associated with Jeep in any way plus the Jeep 2500 doesnt use the 4.0, if it did it would...

Alright, so I was poking around today and I do only have 2 sensors just to clear things up there is no other sensors that are in the exhaust except for these two..checked the cat, its fine, not sure how you would go about testing the CTS or CPS (heard that can cause a drop too) though I havent...

So, since mine is originally a FED XJ it should only have 2 sensors....and replacing the one sensor before the cat should bring it back to normal right? I should add that I can only find 2 sensors after looking under the XJ and under the hood. Is there any way of identifying for sure if it was...

Goto Jeep.com and then to the contact us page; send them an email with your VIN and they will send you a buildsheet. Took about 2 days for mine, found out I had just about every option avail for 00 including UP country package.:cool:

It seems that if 02 sensors are bad on a '00 then the check engine light should come on. Well, I dont have a check engine light, went to have codes pulled but there are none to be pulled but I cant think of any other explanation for the near sudden drop in mileage. I know there is the chance it...

I have 154k on the clock right now Its a '00 XJ 4x4 with the 4.0 Last tune up was at 120k replaced plugs, all filters, new serp belt, and did the brakes while I was at it.

Ive been having a problem where I have had a pretty substantial drop in gas mileage...went from around 20 on the highway to maybe 14 in the matter of a few weeks. First thought is 02 sensors, though I try to get codes pulled and there was nothing. Thinking maybe AIS motor, though I dont think...

So I am going to be replacing my O2 sensors here in the next few weeks and was curious as to whether there was a big advantage in buying the OEM O2 Sensors vs after market ones. As far as price its only about $10 a sensor difference with the OEM one being the more expensive of the two but will...

Even though there have been other similar instances (as documented on link above) on other late model XJS where this has happened? Lemme try to rephrase this, If I hold down the ODO reset and turn the key 3 times i get '2.5' It wont show this ANY OTHER TIME. If I hold down the ODO then turn...

I found a link http://www.go.jeep-xj.info/HowtoECUcodes.htm That is assuming that 2.5 means 25 my IAC (idle air control sensor/motor) and wiring may be faulty. First off where would the be under that hood (diagrams would help as I couldnt find anything online or in several manuals, second...

So I had heard somewhere that by holding down the ODO reset and turning the key three times quickly you can pull the codes off a 00 XJ. So I figured what the hey, why not. I held down the reset and turned it 3 times and 2.5 was displayed in the ODO. Not knowing what it was I tried again but this...

I kinda figured the manual priming it wouldnt hurt it too much. Though someone told me that you can buy a $3 inline check valve from a BMW and get it to work, supposedly its been done on a '00 before. Anyone else hear about this?

Ive had this problem for some time now and am thinking of replacing the fuel pump. The problem is that anytime the XJ has been sitting for a good amount of time, atleast an hour or so when I try to go start it the motor will just crank and crank. If I prime the fuel pump before I try to turn...

x2

Sounds like a bad flasher unit to me. I had the same problem where they either wouldnt blink at all, or would stay on without blinking. Bulbs werent the issue at all. The unit itself is a small gray box that is under the steering column by the drivers side door. It should just pull right out...

I kind of figured, just wanted someone else to say that for a little assurance. Thanks guys for your help.

So I had my charging system tested the other day and saw the alt was only putting out around 103-106 amps, at the time I thought that was ok b/c I was somewhat sure it was only a 106 amp alt. Well I became curious and looked at the build sheet tonight and found its a 124 amp alt. #1. How...

I should probably add that I dont remember the last time I changed the spark plugs, it was incredibly long ago.