The mechanical Bosch K/KE-Jet injection is repeatedly flagged as finicky, especially on cars that sit. Hard cold starts, hot-start vapor-lock-like symptoms, and sensitivity to vacuum leaks come up across listings, usually traced to the cold-start injector needing cleaning or replacement and to leaky injectors or vacuum leaks. …
Bosch K/KE-Jet fuel injection: cold-start and vapor-lock quirks
Mercedes-Benz 190E 2.3-16 / 2.5-16 Cosworth (W201) · mechanical