I’ve been having problems with my car for well over a year now. Where to start about a year and a half ago I would come to a stop and my RPMs would drop and the car felt like it was going to stall but didn’t. When I take my foot of the break it kicks and makes a weird sound I don’t know if the sound is coming from the tranny. Sometimes when this idling problem happens I can take my foot of the break and the car will idle at 20 mph. The engine light came on the code was for the egr valve. I replaced the valve. It seemed a little better but it was still doing the same thing. Over the next several months it got worst .Its seems like when I drive the car for more than 20 minutes in stop in go traffic this problem would happen. Every time I would take to a mechanic he couldn’t duplicate the problem. The next day I would drive to work and about 30 minutes into my drive it would happen. About 3 months ago the car started stalling on me but not all the time it seemed like only when I didn’t let the car warm up
I had the alternator tested it seemed fine so I replaced the battery. The stalling seemed to stop for a while, but now it’s starting again but like I said only when I don’t let the car warm up. The weird thing about some of these Stallings was that the car would stall and while I am coasting start back up on its own and then the rear defrosters would turn on by there self. I don’t know if this will help but every time I am driving and take my foot of the gas the car seems to kick back I don’t know if I have tranny problems.

My car has 154,000 miles and I have not replaced the timing belt yet.

I have taken my car to 4 different places and no one can seem to find the problem its just costing me money to have them look at it. I want to fix this but I don’t know what to do, can anyone help?