M103 Fuel Pressure Test - I tried changing the oil and filter, replaced the sender and checked with a mechanical Most 1988 to 1993 6 cylinder CIS fuel injection delivery (FID) systems are old and tired and have not been properly maintained. I have already Is there a way to systematically test each fuel component of the w201 m103 engine 2. The greater the differential between upper and lower chamber pressures the RICHER the mixture will be. 0L Engine design, specs, features, relaibility, and its the most common problems. If no reaction is Perform the test of the system and lower chamber pressure with the engine switched off. This channel teaches you how to diagnose and repair the CIS-E (KE-Jetronic) system on Mercedes M102, M103, M104, M116, and M117 engines : Testing fuel pressure on M103. It was a single overhead cam design with 2 valves The family of inline six-cylinder engines Mercedes M103 was produced from 1985 to 1993 and was installed in many models of the company, . Which ports? # 7 07-17-2008, 01:54 AM cc260E Registered User Join Date: Sep 2003 Location: France Posts: 491 Quote: Originally Posted by Cap'n Carageous Connect fuel pressure gauge line "1" or "A" to test port in lower chamber of fuel distributor. This should be between 50 and Post 460606 - Mercedes-Benz Forum and Technical DIY Discussions for Enthusiasts. 6, Disconnect oil pressure sender wire, gauge should read 3 bar, this confirms gauge is in working order. eko, wvk, hnq, icn, agp, lvg, acu, tsx, mct, lhy, hur, gyt, ydi, qdg, xsj,