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Q: Won't start and won't go over 30 mph on 2003 Volkswagen Jetta

We moved from Florida to Colorado. Right away we noticed problems with the cars performance. It wouldn't accelerate as quickly as before. Since this 2 more problems have become frequent.
1) The car doesn't like to start, especially in cold weather. You turn the key over and nothing happens. After about 10-15 min it will actually turn over and start.

2) The car will intermittently not go over 30 mph.

To fix these problems we have replaced the battery and the parts that the computer said were faulty. The catalytic converter and the crankshaft position sensor.

After replacing both of these, the car ran great for a day. The next morning it would not start again and would not go over 30 mph. We took it back to the shop and they are now saying we need a new ignition switch, oxygen sensor, and cam sensor. Am I just being ripped off?
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its probally a bad coil pack if u hit the gas and the car dosent shift and the check engine light flashes its the coil pack
I had the same problem with my car not starting in the cold weather. We had a mechanic friend insert a push start button and bypass the ignition switch. It was our ignition switch that was the problem. Since he did that we have not had any problems in the cold weather. Hope this helps.
i have the same problem with my 2006 vw jetta 5,it started not going over 30 mph and later not starting and later was adviced to change the crank shaft possition sensor and i did, but it isn't starting stil
Sounds like you are going to an inexperienced or incompetent shop, I suggest going somewhere else. These problems can be difficult to diagnose, so try to find a good shop, perhaps one that performs emissions tests, they tend to be more knowledgeable with these types of jobs.
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