I know this topic has been discussed before but I have a specific problem that I cannot find the solution for. On cold start, my 1990 300e 2.6 struggles and sometimes stalls on startup. I just replaced my OVP (again). Coolant temp sensor was replaced last year. Coil, dist cap, fuel filter, plugs and wires were also changed last year. I checked the cold start valve with 12v. Works. And is working when engine has started. The 7th injector works as well I believe. I removed it and connected 12v with jumper cables and seemed to spray nicely. Any help would be greatly appreciated