10seventy1
New Member
Hi guys, new here so go easy on me plz... I’ll start with the car details. E350 Cdi auto w207 2009 showing 128000 miles.
After spending nearly a £1000 with my local main dealer on diagnostics and a new Maf New system, For them only to tell me I need a new Ecu as well Another £900, but when I asked if that would cure the fault they simply couldn’t guarantee it. The fault is a boost pressure one but exists right from ignition ON before you even start the engine. The two pressure sensors are reading as follows.
Baro sensor ( by the air filter) constantly 30 Kpa Basically the atmosphere pressure at the top of Mount Everest
Boost sensor (by the throttle body) 100 Kpa Fluctuates slightly the throttle position
Would I be right in saying they should be the same at ignition ON?
I’ve got 5v supply and good ground to both I’ve also measured the reference voltage at the ecu plug end they are also the same, and have had the same results from three MB supplied sensors
Obviously it’s stuck in limp with EMl on
Any help or advice would be fantastic
Many thanks
After spending nearly a £1000 with my local main dealer on diagnostics and a new Maf New system, For them only to tell me I need a new Ecu as well Another £900, but when I asked if that would cure the fault they simply couldn’t guarantee it. The fault is a boost pressure one but exists right from ignition ON before you even start the engine. The two pressure sensors are reading as follows.
Baro sensor ( by the air filter) constantly 30 Kpa Basically the atmosphere pressure at the top of Mount Everest
Boost sensor (by the throttle body) 100 Kpa Fluctuates slightly the throttle position
Would I be right in saying they should be the same at ignition ON?
I’ve got 5v supply and good ground to both I’ve also measured the reference voltage at the ecu plug end they are also the same, and have had the same results from three MB supplied sensors
Obviously it’s stuck in limp with EMl on
Any help or advice would be fantastic
Many thanks