Bought a 1993 190e, has new head, and appears.

Bought a 1993 190e, has new head, and appears new feul dist, I have assembel the car and im having trouble with it, motor seems to have plenty compresion, timing is correct, it hits time to time, but if I spray feul in it will run, only when im spraying feul, I havent run it long but how do you check cold start valve, im running it on injector cleaning system with prem feul, regulated at 60 lb feul pressure, I have flushed tank, the feul really had dead smell to it, the fella I bought car from is very discusted with local repair shop that has stiffed him a time or two, I would like to get car repaired and return it to him, he is very good man, and attends the same church as I do, is there any help checking the cold start valve, the feul pumps are working well, I have replaced feul filter and installed new plugs, any help would greatly appreciated