chizzel89
Active Member
- Joined
- Mar 29, 2010
- Messages
- 79
- Location
- Pembrokeshire
- Car
- Mercedes-Benz C250 Turbodiesel Sport est. 155,000 mls. Peugeot 405 1.9 GLX TD Estate- 280,000 miles
My C250 developed this fault overnight a few days ago.
If I drive along using a light throttle, it feels normal. However if I sink my foot a bit further down to overtake or go up a hill, there is just no acceleration at all. It feels like it did once when I forgot to reconnect the boost compensator pipe when I last took the manifold off, except then I was able to pull over, reconnect it and it was back to normal.
The gearbox changes down as it should, but the engine just doesn't pick up.
However, if I pull away and then go straight to kickdown, the car will shoot off up the road reaching max. revs all the way up to very illegal speeds.
So far Ive changed the fuel filters (pre filter and main filter) and checked the throttle mech operation behind the dash, and it is pulling the throttle potentiometer all the way back so no issues there. I also rodded the small turbo boost pipe into the manifold with some wire to make sure it wasn't blocked with gunge.
I also disconnected the manifold pipe and revved the engine- there was so much turbo pressure that it pushed my hand away.
Anyone got any ideas as to what this could be?
If my fingers dont go too numb I will go out and remove the throttle potentiometer and turbo boost switch/ gubbins off my donor car and put them on mine and see if it makes any difference.
This is a weird one for me- never experienced anything like it before.
If I drive along using a light throttle, it feels normal. However if I sink my foot a bit further down to overtake or go up a hill, there is just no acceleration at all. It feels like it did once when I forgot to reconnect the boost compensator pipe when I last took the manifold off, except then I was able to pull over, reconnect it and it was back to normal.
The gearbox changes down as it should, but the engine just doesn't pick up.
However, if I pull away and then go straight to kickdown, the car will shoot off up the road reaching max. revs all the way up to very illegal speeds.
So far Ive changed the fuel filters (pre filter and main filter) and checked the throttle mech operation behind the dash, and it is pulling the throttle potentiometer all the way back so no issues there. I also rodded the small turbo boost pipe into the manifold with some wire to make sure it wasn't blocked with gunge.
I also disconnected the manifold pipe and revved the engine- there was so much turbo pressure that it pushed my hand away.
Anyone got any ideas as to what this could be?
If my fingers dont go too numb I will go out and remove the throttle potentiometer and turbo boost switch/ gubbins off my donor car and put them on mine and see if it makes any difference.
This is a weird one for me- never experienced anything like it before.
