Tuning Rough Running C.I.S. Gas Fuel Injection

Here are some things you should look out for!

All these fuel injection systems are at least 20 years old and that means you need to watch out for "age related" issues when you go to repair or tune your engine. These systems were introduced in the mid 1970's and continued right up into the early 1990's. 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.

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Problem & Solution

Common among these chassis:


In this video Kent will focus on the rubber parts that are subject to hardening and cracking due to age and heat.