Dean Fletcher
Senior Member
- Joined
- Mar 24, 2018
- Messages
- 4,667
- Reaction score
- 3,923
- Location
- Penrith, Cumbria
- Your Mercedes
- Mercedes S63 AMG
Went out in the car yesterday and noticed that it wasn't as quick as usual but only very slightly, in fact it was that slight that its possible it was the headwind up ont Shap fell 
.
Got to penrith done some shopping then on the way back thought id give the old girl a boot and all was fine, No EML has come on at all and car drives fine. however when plugged in its showing a low boost pressure to turbo 1. It might have been a coincidence and that fault might have been there for a while.
Had a look under the bonnet, couldn't see anything obvious, attached a vacuum line to both wastegates and both held the vacuum and moved freely , checked for leaks to the wastegate from the solenoid and can see anything there, checked some live data and both left and right filter pressure sensor sitting at 984hPa boost pressure at 994hPa and inlet manifold pressure at 510hPa. what is the inlet manifold pressure supposed to be? it was showing low on the Autel.
would this fault show up if the inlet manifold was leaking? shouldn't the manifold be at atmospheric pressure and showing the same values as the other 3 sensors?
Any other ideas or places to check would be appriciated
.Got to penrith done some shopping then on the way back thought id give the old girl a boot and all was fine, No EML has come on at all and car drives fine. however when plugged in its showing a low boost pressure to turbo 1. It might have been a coincidence and that fault might have been there for a while.
Had a look under the bonnet, couldn't see anything obvious, attached a vacuum line to both wastegates and both held the vacuum and moved freely , checked for leaks to the wastegate from the solenoid and can see anything there, checked some live data and both left and right filter pressure sensor sitting at 984hPa boost pressure at 994hPa and inlet manifold pressure at 510hPa. what is the inlet manifold pressure supposed to be? it was showing low on the Autel.
would this fault show up if the inlet manifold was leaking? shouldn't the manifold be at atmospheric pressure and showing the same values as the other 3 sensors?
Any other ideas or places to check would be appriciated
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