Golf IV / Jetta IV :: 2004 - Stalling / Dies After Long Trips - Leak In Water Pump

I have a 2.0l Jetta that has been giving me problems for about a year now.

First, the car started dying out on me after long trips at en excessive rate where it would shut off and have trouble starting multiple times consistently. So I got the fuel lines cleaned, a new fuel filter, the fuel pump checked, and did a basic tune up by changing the sparks and oil.

Still the same problem. after some troubleshooting i gave up and decided to take it to the stealer dealer. after a $130 diagnostic fee and a $300 repair fee they told me that they had fixed it by replacing a speed sensor in the transmission. the car was noticeably running better and did not stall during the short driving i did. I am a student so not much driving was done initially. A couple of months later i took a ~150 mile trip and upon stopping at a red light and trying to go once the light turned green the car stalled.

I took it back to the dealer that told me they would check if the speed sensor was faulty. it was not and they could not refund me my money. i paid for another diagnostic for another $130 and this time they said it was a bad coil pack, a $400 repair fee that i was not going to pay. i went out and got myself a coil pack and installed it myself. still the same problem.

I met a guy that worked for the dealer and had the same tech as the dealers so i took the car to him. he had it for 2 days and drove it for over 80 miles to test run it. he could no replicate the problem and just charged me 80 dollars just for his time.

I decided to take matters into my own hands and I read on these forums a couple of common solutions to the problem such as changing cam,crank,speed sensors etc etc and i started out with the crank..then speed...etc etc.

2 days ago my water pump had been leaking and i believe the antifreeze caused the timing belt to slip about 3 teeth in the middle of driving. luckily no bent valves or any damage to the engine but i did have the push the car about half a mile. After a 5 hour job i replaced the pump and the timing belt along with the cam sensor. I drove it around 70 miles and everything seemed fine. just yesterday i drove around 120 miles and the car had a small stall about 50 miles in when i was at a red light. The rest of the trip it ran fine. As i got to my apartments I decided to see if i could replicate the stall since the engine was hot. I stopped and waited around 10 seconds and then stepped on the gas, the car did almost stall but it stayed on since i let go of the gas. I tried it again and it would no longer do it.