Hard Starting and Rough Running Gas Engine with C.I.S. Bosch Fuel Injection

Sometimes it can be something quite simple - other times not...

Just a quick intro. More videos to follow. Please see my YouTube playlist for the full series titled 1977 to 1993 Bosch C.I.S. Gas Fuel Injection. https://www.youtube.com/playlist?list=PLtRKk64pu2wp1txgW4sOqs7ErB2ilIRmt

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Problem & Solution

Common among these chassis:


Common symptoms are rough running at startup and low idle speed. You saw CIS injection on the 4, 6, and 8 cylinder engines that were installed in the 107 Chassis 450SL 450SLC 380SL 560SL 1977 to 1989, 116 chassis 450SE 450SEL 280SE 280SEL 6.9 1977 to 1980, 123 chassis 1977-1985 Models 230E 280E 280CE, 126 chassis 380SE 380SEL 500SEL 300SDL 420SEL 300SE, 300SEL 560SEL 380SEC and 560SEC 1981-1991, 201 Chassis 190E 1984 to 1993 and 124 Chassis 260E 300E 300TE 300CE 400E 500E 1986 to 1993, and the R129 chassis 300SL and 500SL 1990 to 1993.  Only the models after 1985 would have these specific problems together.

For the solution to this particular problem on the 190E 2.6 engine shown in this YouTube video please refer to the on demand video listed in related products to the right: