About 6 months ago I tried to start my vehicle (description of vehicle included in my question) but it kept stalling. It would run for only as long as I pumped the gas, but as soon as I stopped giving it gas the vehicle would almost immediately stall. While this was going on I noticed that the steering wheel was extremely difficult to move. When I had it towed to the dealer's shop the mechanic told me that it was starting up just fine for him and that he could not identify any problems with my vehicle. Now, after six months the problem has apparently returned. When I was driving back from the grocery store my vehicle stalled and the steering wheel was again difficult to move. After a few re-starts I was able to make it home. The next day, when returning home from work, I was attempting to parallel park when the steering wheel became difficult to move and my vehicle stalled.
I have very little money and would like to have a good idea about what the nature of the problem might be before seeing a mechanic. Also, regrettably, I know very little about cars and car-maintenance.
Thank you in advance for any help!