Tracking Down Jeep Engine Stumble

For the past four months my Jeep Cherokee has been plagued by random stumbling/bucking issues. I’ve lost count as to how many times the fuel pressure has been checked at this point. I’d even added a can of Sea Foam to at least say I tried that. Every time though it reads normal. So the next step was to do a tune up, stumbling and bucking was still lingering. The next step was to change the throttle position sensor, which we did twice (one was a spare and the latter one is new). Still the stumbling lingered. We cleaned the throttle body, connection to the crankshaft position sensor and the stumbling/bucking lingered. It had even gotten to the point that at random times it would also just die on me. So Mike and I changed out the distributor, which showed some wear. We drove the Jeep over 100 miles in one day and it did perfectly fine. The next day the stumbling returned Sigh

 

I ended up buying a crankshaft position sensor since my Jeep friends suggested that I replace it. My best friend drove it to work the following day and it ran smoothly—for the day. I go to take it home and halfway home the stumbling returns. This time though I caught the tachometer fluctuating.

 

After enjoying a trip to Atlanta to the 4 Wheel Drive Truck & Jeep Fest and to Summit Racing in McDonough, Georgia, I was in the mood to pop open the hood and inspect as many wires as I could and clean the idle air control valve and the ECM connection. It’s day three and so far the Jeep is doing well. In fact, she seems perkier now.

Jeep Cherokee Stumbles

In January of this year I started having stumbling issues with my Jeep Cherokee. The throttle body was cleaned, fuel pressure checked, the spark plugs, wires and distributor button were replaced yet the stumbling continued. As I drove my Jeep more, the worse the stumbling got. There were times I would hit bumps and it felt as if it were cutting off on me. Then one day as I was heading to my mom’s work to meet her, the check engine light came on so I turned onto a side street, pulled over and checked the code.  It came back as #24, Throttle Position Sensor.

Since I had a spare TPS from a donor Jeep, I just switched it out which cured the stumbling issue, for a few months. Recently the stumbling came back again. I cleaned the throttle body, checked spark plug wires, put in some seafoam in the gas tank and once again checked the fuel pressure. All were in check. As I continued to drive it, the stumbling was getting worse very quickly. Hitting bumps resulted in it cutting out numerous times. A couple of times it even died on me when I stopped at traffic lights and even parking at home. I also noticed my gas mileage was terrible which is one of the signs the TPS could be bad.

Before letting it get worse to the point the check engine light would come on, I went ahead and purchased a new TPS from Autozone for $38. It is a very simple 5 minute replacement and all you need is the T20 hexhead for the two screws holding the TPS at the throttle body assembly. So far no stumbling and the gas mileage has greatly improved.

Upgrading the 8.25 differential cover on a Jeep

Shopping around for a rough & tough differential cover for the Chrysler 8.25 differential can be a challenge. Try searching on Ebay and chances are you are only going to find the OEM covers or very expensive covers. If you or someone you know welds, consider purchasing a DIY kit from Blue Torch Fabworks located in the Birmingham, Alabama area. They have great shipping prices and were very fast to ship it out.

If you just want one already made then consider purchasing their differential cover ready to go for about twice the price of the DIY. Their prices are very competitive with just about anything else you would find in a catalog or even on Ebay. Not sure about Blue Torch Fabworks? Look them up on Facebook and they will answer your questions or you can view their pictures to see what great items they offer.

The Reliability of the Jeep Cherokee

With every automobile there are going to be variable opinions about reliability. For instance, my grandfather owns a Cadillac Catera and has had it since it was brand new. Try going to the dealership to find parts and they are either no longer available or it is going to take nearly a month to get what you need. Countless times the salesman have attempted to convince him to trade the car in and have literally told him it is just a piece of junk. That is not how grandpa sees it though. Having driven the car I can say when it does run it rides well. I can remember after I bought my Jeep Cherokee that my grandfather asked me a ton of questions and actually questioned why I wanted an “old” vehicle and why I wanted to go offroading. He insinuated I was spending a lot of money, which if you wrote everything down I had done whether it be upgrades or maintenance/repairs, wouldn’t come close to what he has spent fixing his Catera. Plain and simple,  it is just not reliable like my Jeep Cherokee.

My Jeep may be over 20 years old and some will see it as ready to go to the scrap yard (which infuriates me). A few dents here and there doesn’t make it a bad vehicle. What does is under the hood and the drivetrain if you have had to constantly make repairs. I so want to ask people how many times their automobile has left them stranded, been repaired by them and how many miles they actually have on theirs? Now I will give credit to my Toyota friends that their automobiles do just as good as my Cherokee. I am amazed at some of the mileage stories I have heard from long time Toyota owners.

If you are a Jalopnik.com reader you may have recently come across an article about the top ten best used cars to buy with your tax refund. In case you haven’t though, their #4 pick is the Jeep Cherokee: http://jalopnik.com/5902578/the-ten-best-used-cars-to-buy-with-your-tax-refund/gallery/8 .

I used to think that a car with over 100K miles was getting worn out. Not with a Jeep Cherokee and according to my Jeep friends, that is barely breaking it in. My boyfriends Cherokee has 350K miles on it with original parts; mine has around 220K miles on it though I have changed out the engine and transmission.

The original owner of my Cherokee didn’t take care of her very well so when I brought her home I discovered a cracked head. That’s no biggie since I went to Pull-A-Part junk yard in Atlanta to get another one. Six months later I purchased a Grand Cherokee from my uncle just for the engine he had spent lots of money on overhauling. The only reason why I changed out my transmission was because of my rough off roading skills. I apparently had crimped the lines together. Looking at the prices for new lines I realized I could just buy another used transmission. I ended up getting one for free from an XJ friend though which was even better.
So I have had to replace a radiator a time or two (due to manufacturer defects), a battery that cracked, a water pump and a throttle position sensor. Those are all normal maintenance repairs that happen in the life of an automobile. The times that I have been stranded on the side of the road are because of operator error, mostly running out of gas thinking I could go just a little further down the road to a cheaper gas station. Once was a new radiator that split at the tank which was plastic (sigh).

In the five years that I have owned my Cherokee I have driven it a lot. One year I decided to make a spur of the moment trip to Texas for Thanksgiving with two of my kids in tow. While my mom was in a panic because my Jeep was “old” in her eyes, I was confident I would get there and back, 1,800 miles later. I have driven it to Harlan, Kentucky which is a four hour drive one way at least once a year and sometimes twice. I lived in Cookeville, Tennessee about 100 miles one way from my hometown at least twice a month for a year. I just about drive my Cherokee everyday taking my kids to school and running errands.

Before I owned the Jeep, I had a 2000 Mazda MPV mini van. It was fancy with the leather seats, sun roof and video player, but I wasn’t happy with it. I liked it because it had room for my kids and their stuff I had to tag along when they were babies and toddlers, but it wasn’t me. I made the decision I wanted a vehicle I could easily find parts for, do a lot of the repairs on my own and was known to be reliable. After talking with my best friend I learned the Jeep Cherokee fit all three categories. I remembered my step dad owned a Cherokee and loved it. He drove it until it fell apart and it had close to 300K miles on it when he sold it.

Out of the nine automobiles I have ever owned which includes two Hondas and Mazdas, Chevrolet and Fords, the Jeep Cherokee has been the best and most reliable of them all. It is the one and only vehicle I have ever been happy with. Ask my three kids what their favorite vehicle has been and they will tell you the Jeep.

 

Jeep Cherokee Power Steering Hose Replacement

Jeep Cherokee Power Steering Hose Replacement

I have replaced several power steering hoses on various Jeep Cherokees. It has gotten to be a pretty straight forward job. See this previous post on how to replace a power steering hose.

Janice’s 1999 Cherokee had been emitting a puff of smoke each time she turned her XJ to full lock. Although there was little sign of a leak on the hose, our experience with the Green Jeep catching fire due to a power steering hose leak made me extra cautious.

I got a new hose and then pulled the electric fan and the air box to make room. I tried using the various 18mm wrenches I had to get the hose loose from the steering box. I have always been successful in the past using an open end wrench. However, this one refused to budge.

I picked up a set of crow foot flare nut wrenches from my local NAPA store. They have a great set of tools in a nice case for around $20. Unfortunately I forgot that the bottom is an 18mm and the top is a 5/8 inch. I bought only the SAE set. The store was closed for the holiday by the time I figured out I also need the metric set.

Jennifer rescued me by searching until she found a set at O’Reilly’s. It is still a nice set for about the same price as the NAPA set but does not have the nice case.

I used the 18 metric crow foot flare nut wrench to break loose the lower line. It took a lot of torque but it eventually broke free. Janice and Jennifer were able to finish taking it out using the 18mm stubby wrench.

I used the 5/8 crow foot to pop loose the upper hose. It was not nearly as tight. I showed them how to put on the O rings on each end of the hose and let them get the lines threaded into place. The lower one always seems to be difficult and takes some patience to get it started.

After the new line was installed, I had them add some fluid and jack up the front of the Jeep. They turned the wheel from lock to lock to bleed the air out of the line. After that, they started the engine and repeated the process.

Once most of the air was out, she turned the wheel to one of the locks and listened for the pressure relief to open. There was a noticeable change in sound as the last of the air purged.

I rechecked the level of fluid in the power steering reservoir and checked for leaks again. Now we all feel much safer driving the Jeep.


Powercraft Power Steering Pressure Hose – 80290

Powercraft Power Steering Pressure Hose - 80290