One problem related to crankshaft position sensor has been reported for the 1999 Jeep Grand Cherokee. The most recently reported issues are listed below.
Auto had 40000+ miles when I bought it from my brother. I had it only a few months when it stalled on the interstate. It would not start until I sat for a little while. I am capable of overcoming auto trouble so I didn't think much about this incident due to the fact that I have been a mechanic for many years now. Then it began to stall in heavy traffic and sometimes would start again and other times after waiting several minutes. I replaced the crank sensor, in-tank fuel pump and filter. It ran okay for a while but began to hard start and stall again about 2 mos. Ago. Then 2 days ago it stalled something like 25 times coming home from the hospital. Since then I have been on the internet reading the blogs about this problem and if everyone that has this issue would email you, your computers would shut down. It is unbelievable that the manufacturer is just replacing the expensive parts at random, taking the money and not fixing the problem. These people, myself included, are begging for a solution to a problem with a very nice automobile made in America by skilled top dollar union labor. It is getting close to scam epidemic. My car is sitting in my garage not fixed because there are about ten different things in the electrical and fuel system that can cause these symptoms. I am a disabled veteran and cannot afford to go down that eliminating process. My doctor doesn't do me that way and I won't allow the manufacturer to do it either.