Hello at all, I've a problem with my car.

It don´t starts normally (I put the key in and turn it immediately), but it almost won't start at all.
Something in the throttle housing keeps cracking and cracking, and if I wait longer (I've even hit it a bit with a hammer), it will start. I drove it once and it kept stalling and almost died. I went straight back home because I didn't want to stop. Even a trip to the repair shop is impossible!
I keept it at 2000 rpm at home while it was idle, and the engine ran and warmed up. When I took my foot off the gas, it ran for 20 seconds and then died again. But then it started again. But hard! So it can't really be the cold start or the immobilizer, or?! I'm no expert, but I've owned a lot of cars.

Thank you
Sven