I started to accelerate, and shift into 2nd gear and there was some hesitation, and sputtering. I just replaced the spark plugs, cleaned out the throttle body, which was extremely dirty. Checked air filter, which was very clean, and I ended up discovering that the wire to the fifth spark plug was mis-firing. I went ahead and replaced the ignition wires as well. I also replaced the distributor cap, and rotor. It began running perfectly!! After going through all of that, which I was going to do anyways, it started doing it again, but this time, I realized that recently I have had to park it on an incline. Now...when I back out, and take off it acts up!! My question is this: Is it the incline that is making it act as if it is starving for fuel, or is that even possible? After a short time on level ground, it runs perfectly fine. My Dad mentioned a possible vapor lock. I have been thinking about replacing the fuel filter next, but I wanted to get some more opinions/input about this issue before I did that. Thanks...
your fuel pump is probably going out and needs to be replaced, which is where your fuel filter is at. I know a few people that have had the same problem on their wranglers and it ends being that the fuel pump is dieing
Also, if you happen to have the 15 gallon limit this is the perfect opportunity to remove it's limiting hose (not the one with the ball) and make use of the 19 gallons all jeep tanks can hold. (15 gallon tank restriction is only possible on 97-99 wranglers)
I have almost the same problem with my jeep. Recently I have been parking my jeep on an incline at work. Mine starts up fine, then after awhile of driving at 60-70 as soon as I come off the gas it starts hesitating and jerking a bit. I had mine to the dealer to look at it. They test drove it, the damn thing didnt do it. (that was friday) Today it did it again then levels off. Seems to start when im either going up a slight incline on the highway or slowing down and then accelerating again. The dealer wants 467.00 for the part, AZ wants 212.99, Napa wants 299.99
Mine jeep is a 2000 though.
Well...found out what the problem is. I finally took it to a Jeep Dealership, and after a few times taking it to them, because it would never act up. It was determined that the valve springs are sticking, which according to them, that would explain the hesitation and rough idling. So...they went ahead and treated the upper engine with a high quality type of solvent. They had the ending running and pour this solvent into the engine until it completely died. They let it sit for about 4 hours. It actually worked for a long time, but now it has started acting up again, but very much less frequently. So...if it in increases in frequency, then I will probably have to have the valve springs replaced, which will run me approx. $200.00 +. So...if anybody else has the same problem with heir Jeep...this is something to look at. Thanks for everyone's input...\m/ \m/