- Joined
- Jul 12, 2011
- Messages
- 16,076
- Location
- Near Salisbury
- Car
- MX5 1.8 Sport, Range Rover 5.0 SC, BMW X1
My E Class 3.0 with the OM642 V6 has developed a trait of rough running when started from cold and whilst warming up.
My Indie though the rear engine/transmission mount may have been responsible because the vibrations are worse when cold and in reverse gear. This mount has been changed and although there is some improvement the main problem remains.
The degree of rough running does seem to vary with outside temperature with it being worse on days when it is zero degrees C or below. It also gets worse when under load such as low-speed cornering when the engine falls to idle and the power steering is adding additional load to a cold engine. When warmed up it is smooth with a stable idle and performance is unaffected.
I have/not scanned it for any fault codes yet ( I have Icarsoft MBii) and am unsure what to look for in terms of aberrant values. I know from its history that 3 Glow plugs have been replaced and am wondering if it would be a good starting point (no pun intended!) to replace all of them as I understand they carry on working for some time after the initial light goes out and, if faulty this may be the problem. At140,000 miles it certainly would not hurt.
Any suggestions of what to look for on a scan welcomed as indeed are any other suggestions, also does anyone have a part number for the OE Glow plugs? I assume MB does not make them so a reputable make such as Beru or NGK etc is perfectly acceptable?
Many thanks in advance
My Indie though the rear engine/transmission mount may have been responsible because the vibrations are worse when cold and in reverse gear. This mount has been changed and although there is some improvement the main problem remains.
The degree of rough running does seem to vary with outside temperature with it being worse on days when it is zero degrees C or below. It also gets worse when under load such as low-speed cornering when the engine falls to idle and the power steering is adding additional load to a cold engine. When warmed up it is smooth with a stable idle and performance is unaffected.
I have/not scanned it for any fault codes yet ( I have Icarsoft MBii) and am unsure what to look for in terms of aberrant values. I know from its history that 3 Glow plugs have been replaced and am wondering if it would be a good starting point (no pun intended!) to replace all of them as I understand they carry on working for some time after the initial light goes out and, if faulty this may be the problem. At140,000 miles it certainly would not hurt.
Any suggestions of what to look for on a scan welcomed as indeed are any other suggestions, also does anyone have a part number for the OE Glow plugs? I assume MB does not make them so a reputable make such as Beru or NGK etc is perfectly acceptable?
Many thanks in advance
