its a 91' 1.9 a/t. At a stop, in gear, the engine dies. Before doing so ihe engine shakes. The idle drops to about 600rpm. It has a new timing belt and water pump. The cylinder head has been rebuilt. I cleaned the MAF sensor, and replaced the IAC. Theres no codes. I does have a lifter tick, but I hear thats normal. Any thoughts? Please help!