Ben J
New Member
Hello all,
Just wondered if anyone might be able to shed some light on an intermittent engine fault on my mercedes W124 280E Estate 1995
The fault has happened several times now always in the same driving conditions which are the following:
Coming off a higher speed run, say on a motorway or A road and then sitting in queing traffic inching forward stopping, inching forward stopping. When I go to accelerate away when the traffic queue clears the revs increase before cutting out to a tickover. and the engine will only rev to approx 1600rpm before dying back to 700 revs suddenly. If you apply pressure on the accelerator it will again rev to approx 1600rpm then cut out back to tickover again. It does this until you creep along for a couple of miles at about 10mph and then suddenly engine has full power again which seems to coincide with a drop in engine temperature and air passing through the engine. Engine temperature when its happened has been around 96 so relatively normal for queing traffic in the summer??
I have replaced the air mass meter and the O2 sensor and the engine coolant was brand new in April and it hasnt seemed to clear the problem. I hooked the car up to a "star machine" and it indicated llamda sensor warnings but I had the CAT and emissions tested and they were all normal so im at a bit of a loss.
It feels like it is air fuel mixture or fuel starvation. Im not sure if its related but the car will not change up from 2nd to 3rd gear from cold for about 1/4mile when you first begin a journey. i read this was a catalytic converter warming proceedure commomn to W124's on the web but I not sure.
Any advice anyone has woud be much appreciated.
many thanks BEN
Just wondered if anyone might be able to shed some light on an intermittent engine fault on my mercedes W124 280E Estate 1995
The fault has happened several times now always in the same driving conditions which are the following:
Coming off a higher speed run, say on a motorway or A road and then sitting in queing traffic inching forward stopping, inching forward stopping. When I go to accelerate away when the traffic queue clears the revs increase before cutting out to a tickover. and the engine will only rev to approx 1600rpm before dying back to 700 revs suddenly. If you apply pressure on the accelerator it will again rev to approx 1600rpm then cut out back to tickover again. It does this until you creep along for a couple of miles at about 10mph and then suddenly engine has full power again which seems to coincide with a drop in engine temperature and air passing through the engine. Engine temperature when its happened has been around 96 so relatively normal for queing traffic in the summer??
I have replaced the air mass meter and the O2 sensor and the engine coolant was brand new in April and it hasnt seemed to clear the problem. I hooked the car up to a "star machine" and it indicated llamda sensor warnings but I had the CAT and emissions tested and they were all normal so im at a bit of a loss.
It feels like it is air fuel mixture or fuel starvation. Im not sure if its related but the car will not change up from 2nd to 3rd gear from cold for about 1/4mile when you first begin a journey. i read this was a catalytic converter warming proceedure commomn to W124's on the web but I not sure.
Any advice anyone has woud be much appreciated.
many thanks BEN
