C250TD - MAP /vacuum transducer testing???
- Thread starter paulfoel
- Start date
-
- Tags
- c250td map or vacuum transducer
- Joined
- Feb 8, 2007
- Messages
- 20,694
- Location
- Portsmouth, Hampshire.
- Car
- E55K SL500 E250X2 Smart44 Brabus Track car E450Cabriolet X350 Pick up
If they fail I think is permanant not intermitant. I do not know of any way to test them either.
I have never known one to fail intermitantly.
I have never known one to fail intermitantly.
Parrot of Doom
MB Enthusiast
Mine has two. Dunno if yours does, but if it does, swapping them over is the easy test.
Dieselman
Banned
- Joined
- Jul 13, 2003
- Messages
- 34,199
- Car
- Peugeot 403 Convertible
Or just apply 12v to the electrical connector and watch the turbo actuator, it's only a servo solenoid valve.
How easy is that?
Whats the other one used for? What am I potentially causing to not work by swapping them?
How easy is it to swap? Pics ?
Parrot of Doom
MB Enthusiast
Very easy. No tools required. And you won't break anything by swapping them, they're identical part numbers (printed on top)
Dieselman
Banned
- Joined
- Jul 13, 2003
- Messages
- 34,199
- Car
- Peugeot 403 Convertible
One is for the Turbo and the other for the EGR valve.
So if I take the (potentially) screwed one off the turbo and stick it on the EGR (and vice versa), I might end up with the one on the turbo working but the one on the EGR not.
What would be the outcome of that? i.e. EGR valve not working properly...
Dieselman
Banned
- Joined
- Jul 13, 2003
- Messages
- 34,199
- Car
- Peugeot 403 Convertible
Given that there is no MAF to detect airflow maybe nothing, otherwise it will go into limp home after about 5 mins driving.
Err, limp home drops the turbo so might be the problem all along.
edit: definately the 250 doesn't monitor EGR operation so it should be Ok.
Err, limp home drops the turbo so might be the problem all along.
edit: definately the 250 doesn't monitor EGR operation so it should be Ok.
OK. So why is there one on the EGR valve then? does it do anything?
- Joined
- Feb 8, 2007
- Messages
- 20,694
- Location
- Portsmouth, Hampshire.
- Car
- E55K SL500 E250X2 Smart44 Brabus Track car E450Cabriolet X350 Pick up
Thats them.
Which one is which?
Top one was found up near the top left of the engine compartment...
- Joined
- Feb 8, 2007
- Messages
- 20,694
- Location
- Portsmouth, Hampshire.
- Car
- E55K SL500 E250X2 Smart44 Brabus Track car E450Cabriolet X350 Pick up
The bottom pic is the one for the Turbo. Other for the EGR
- Joined
- Feb 8, 2007
- Messages
- 20,694
- Location
- Portsmouth, Hampshire.
- Car
- E55K SL500 E250X2 Smart44 Brabus Track car E450Cabriolet X350 Pick up
err sorry I might be wrong about the top pic. I don't think its the EGR one
Harley Man
Active Member
- Joined
- Aug 17, 2006
- Messages
- 351
- Location
- Cobham, Surrey
- Car
- 1 x CLK W208 ragtop, C220 estate, and loads of motorbikes
On my 1998 C250TD the valve next to the heater duovalve works the EGR valve, and the one below the airfilter box (ish) works the turbo.
- Joined
- Feb 8, 2007
- Messages
- 20,694
- Location
- Portsmouth, Hampshire.
- Car
- E55K SL500 E250X2 Smart44 Brabus Track car E450Cabriolet X350 Pick up
I don't think they are.
- Joined
- Feb 8, 2007
- Messages
- 20,694
- Location
- Portsmouth, Hampshire.
- Car
- E55K SL500 E250X2 Smart44 Brabus Track car E450Cabriolet X350 Pick up
My mum has a C250td and I am going to see her later. I will have a look for you and see if I can find the EGR one.
Parrot of Doom
MB Enthusiast
I don't think they're identical. Also, is there a pipe missing from the bottom of the top one?
