Gmeecham
New Registration
This is my first post so please bear with me
Starting from the beginning. I had a problem with my E270 where the EGR valve came up on diag (p0404). Took off and cleaned thoroughly. Took on test drive and seemed to work ok until a long drive (30+ miles).
Back on the diag, now comes up with 2359-1 (low boost pressure), overfuels and kicks black smoke out constantly. When codes are cleared car works perfectly barre the smoking and overfueling until up to operating temperature and speed over 75mph then hits limp mode. Running diag shows at the point of fault EGR valve shuts off but actuates normally pre-fault. All other sensors are working (although using launch EasyDiag with benz software) so can't see tolerances. Oh also no eml comes on which wouldn't expect to
Changed map sensor but then came up with map sensor on diag so returned to original after some delicate cleaning. (Possibly faulty sensor but unsure)
No visible splits in hoses just the regular oil seepage from the turbo to intercooler hose. Intercooler seems in good condition. Recently changed all filters with OE equivalent (purflux) and low saps oil MB approved oil.
Really scratching my head on this as all of this (to me) points to an electronic fault (as only faults under specific parameters) and trying to avoid seldom changing sensors. Originally I was just going to have the EGR valve deleted and mapped out but if there is another underlying fault I don't want to needlessly waste money.
If anyone can help or point me in the right direction or even provide me with the normal values I would be very thankful as this fault is slowly driving me mad and trying to avoid taking it to a garage as I am quite mechanically minded
Starting from the beginning. I had a problem with my E270 where the EGR valve came up on diag (p0404). Took off and cleaned thoroughly. Took on test drive and seemed to work ok until a long drive (30+ miles).
Back on the diag, now comes up with 2359-1 (low boost pressure), overfuels and kicks black smoke out constantly. When codes are cleared car works perfectly barre the smoking and overfueling until up to operating temperature and speed over 75mph then hits limp mode. Running diag shows at the point of fault EGR valve shuts off but actuates normally pre-fault. All other sensors are working (although using launch EasyDiag with benz software) so can't see tolerances. Oh also no eml comes on which wouldn't expect to
Changed map sensor but then came up with map sensor on diag so returned to original after some delicate cleaning. (Possibly faulty sensor but unsure)
No visible splits in hoses just the regular oil seepage from the turbo to intercooler hose. Intercooler seems in good condition. Recently changed all filters with OE equivalent (purflux) and low saps oil MB approved oil.
Really scratching my head on this as all of this (to me) points to an electronic fault (as only faults under specific parameters) and trying to avoid seldom changing sensors. Originally I was just going to have the EGR valve deleted and mapped out but if there is another underlying fault I don't want to needlessly waste money.
If anyone can help or point me in the right direction or even provide me with the normal values I would be very thankful as this fault is slowly driving me mad and trying to avoid taking it to a garage as I am quite mechanically minded
