K-Jet fuel pressure test part 4

I’ve been trying to narrow down poor running on my 79 280SE when cold. Previously, I had two issues I was trying to narrow down, high control pressure when cold, and after a while both system and control pressure dropping and fluctuating. I had replaced the fuel pump, which made no difference to the fluctuation issue. I had also sent off my warm up regulator to be cleaned.

When my warm up regulator returned, I refitted it to the car. Even without running the engine, the control pressure was much better. Actually it was now too low. I still had […]

KE Jetronic EHA Adjustment

I discovered at the MBCNSW Dyno day that my 560SEC was running dangerously lean. Lean enough to cause damage to the engine. While I was in the USA for work, I went to the Mid Florida Auto show. I met Pierre Hedary there (who runs an independent Mercedes workshop), who suggested that I should start by testing my fuel pressures and that he had a couple of videos on youtube to help. The first video was on checking KE Jetronic Fuel Pressures. The second video was on KE Jetronic EHA adjustment.

As I own two KE Jetronic cars and one […]