When we take a car into the dealer or whoever, we are at their mercy. Rather than get into this position, go through the shop manual, with patience you can write down a list of possible causes of your symptoms. You should search for similar problems dealt with on this forum, if there are none, post a new question and wait. Meanwhile do your own research on the problem using the shop manual.

The answers to a lot of problems are in the shop manual, it may take some time but it can be done and lets face it you are not going anywhere without a car. Items like the crank position sensor is a good example. You will need a good multimeter to test for low voltage and ohms. Using the methods outlined in the manual you test it step by step.

When you find the problem you will be proud of yourself and when you tell the service rep what is wrong he probably thinks your full of s**t but so what. You will not have him saying you need other things replaced as well, lets face it how many times do two or three components go at the same time, rarely. They just cover all the bases and hope it works, then you pay for parts that were not needed in the first place.

This forum is full of tales of people who paid good money and still have the same problem. Not paying the money in the first place is much easier than trying to get it back.