I believe car would act as you describe if it was running for a few seconds off of cold start valve/injector then stall because fuel injectors aren't firing. You mentioned checking vacuum at MPS. The 4-prong fuel injection harness plug on MPS must be plugged into MPS for car to run; otherwise, car will fire up for a few seconds on cold start valve then die because ecu won't send signal to injectors with MPS unplugged. Perhaps you knocked MPS plug loose when messing with vacuum hose?
The car runs for five seconds then stalls
I have a 1974 Mercedes 450 SL that runs for exactly 2 to 5 seconds and then stalls consistently… Any thoughts?
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