'86 190E stumbles from start

[bill buttermore]

Hi,

Just bought this Mercedes with a bad tranny two weeks ago for $600. 2.3 liter 8 valve. It had been sitting for 3 years. I replaced the transmission and filled the tank with fresh gasoline. I replaced the fuel pressure regulator which was leaking fuel into the vacuum line, and unstuck the no. 1 cylinder injector. The car now starts and idles much better, but it stumbles when pulling out from a stop. Before the engine is fully warmed up, it sometimes stalls when the accelerator is depressed.

I searched the forum and found some information on the EHA. Is this the mixture adjustment? I have thought about cleaning the throttle plate and the pin on the fuel injection assembly, but wasn't sure if I would need new gaskets if I disassembled it to clean it up.

Any advice on how best to get rid of the stumbling, stalling from start?

Thanks,