I have a 1999 Jeep Grand Cherokee. It was running good but then all of a sudden it starts running rough. You can be driving down the road and all of a sudden it will die . It will run good for about 10-15 mins at a time before it starts stalling. Almost like it is out of gas. But it has plenty. The RMP run about 500-700 now. Some times when it stalls it back fires as well. We have changed the fuel filter, we have changed the PCM , The battery, the ADS relay and tried fuel attive but nothing helps . We also took it to Autozone to have them check to see if it was reading any codes and nothing . Please help

I have a 99 jeep myself and it was my throttle position sensor.

Possible low fuel pressure. Should be 31-35 depending on which engine you have. Check to see what you have.

Hi, i have a 1999 jeep grand cherokee, 4.0 litre, had the same problem, quits running out of the blue, driving down the road, or sitting idling. starts right back up or takes some cranking to get it running. found out that the crankshaft position sensor was going bad, cost 40$ for the part, but had to have mechinac replace it due to it's location, hard to get at. jeep runs great now.

Trick question.....no fair!!!!!!

Seriously, it depends on your application. I had a 1999 and now drive a 2001......

The best advice will be from a good tire store... I can only offer you what I know based on experience.

A good "All Season" M/S (mud and snow) tire rated "Traction A" is OK for "all season" driving UNLESS you are facing allot of mud and snow!

If so, you need "off road" or "snow" tires.... if you are looking at lots of ice on the road, you need to have them "studded". You will have to change this type of tire after the winter season is over as required by law. Also, these tires make allot of "road noise" and are unsuitable for things like commuting down the freeway.

You will get the best advice from your local tire dealer because even though we can give you generic answers like those I just provided, your local tire dealer can understand much better exactly what you want to use your Jeep for in your particular neighborhood, and give you exactly what you need.

I have a 99 blazer and mine did this to me while I was in a drive thru! My battery terminals were loose and dirty. Cleaned them up and tightened them and problem was solved. Good luck

check the cables of the spark plugs, some times it occurs that the cables get loose from its plastic retainers and touch any metal in the engine, causing missfire of the related spark plug, hence rough running of the engine. Put all cables on the retainers making sure none touches the bare metal of the engine. That should help.

Most often that is a symptom of a fuel pump beginning to fail. As it runs, it begins to overheat and bind. After it cools down, it frees itself up and then works again. However, the same problem can also be caused by a crank position sensor going bad.
Next time it happens, turn the key on while someone listens to hear if the pump (inside the tank) is running. If not, likely that's what is failing.
Crank sensor can be tested with a digital ohmmeter, but many times it will not show up as bad until it completely fails.

check the wires to the fuel pump if they have rubbed against something and the insulation wore through hitting bumps or rain could cause it to short and kick the relay and resets again and will start

Check fuel filter and fule pump

I had the same problem with my 99 Cherokee. I was told to replace the blower motor for the carburetor, works great and gas mileage improved.