C250 Turbo Fuel Problem

Adriana1

Member
Joined
Jul 26, 2009
Messages
12
Reaction score
0
Hi Guys & Gals!!
didnt mean to sound like Jimmy Saville!

I have a problem with a C250 Turbo D estate- 150k 1998 in that it seams to start and run Ok but when pushed up hill the fuel delivery cannot cope with the demand from the engine and after a very short time maybe 1/4 mile it conks out just like its running out of fuel!! After checking the fuel filter (replaced recently) its empty so lots of priming later off it goes but again as soon as there is demand from the engine it runs out.
There alos seems to be a lot of air in the fuel lines as you can clearly see air in the fuel and on the return pipe from the top of the filetr housing someone prior to my ownership has fitted a solinoid valve.
This is a car I brought to take and leave in Spain but so far I am a bit dissapointed in that it seems very slugginsh and now this fuel problem

Any help would be greatley apreiciated

Thanks Adrian
 

simon_wall69

Senior Member
Joined
Oct 9, 2007
Messages
502
Reaction score
1
Location
Stone, Staffordshire
The o-rings on the fuel lines will need to be replaced. Also, there are two fuel filters to be changed. There is (I think) an inline filter as well in the housing that the main fuel filter is bolted to.

This is probably the most common old Merc diesel problem. It's worth doing thoroughly and properly now so the problem doesn't recur somewhere else on the fuel system. It does rely on being airtight to work.

When sorted, your power should return as well. It is slow as there is air in the fuel lines.

If you do a search there will be plenty of advice on here.
 

turbopete

Senior Member
Joined
Feb 4, 2009
Messages
14,204
Reaction score
328
Age
46
Location
Spennymoor
Your Mercedes
2010 '60' Ford Mondeo 2.0TDCi Zetec (sorry)
this is a dead ringer for a blocked fuel tank strainer.
 
OP
A

Adriana1

Member
Joined
Jul 26, 2009
Messages
12
Reaction score
0
  • Thread Starter
  • Thread starter
  • #4
I have ordered a set of new fuel pipes and seal kit I will get this fitted over the weekend and see how it goes then- does anyone have an info on changing the pipe work and seals??
If there is still a problem i will check on the fuel tanks strainer thanks to both who replied
Adrian
Adrian
 

turbopete

Senior Member
Joined
Feb 4, 2009
Messages
14,204
Reaction score
328
Age
46
Location
Spennymoor
Your Mercedes
2010 '60' Ford Mondeo 2.0TDCi Zetec (sorry)
fairly self explanetory when you get the new pipes and seals. just replace 1 at a time then they go back to the correct places and all should be well. its usually the clear plastic pipes that give the problems, or rather the o rings (seals) that seal them that fail. theres also, as simon mentioned, the pre filter in the alloy housing the fuel filter fastens to, but if the clear pipes are completely empty, my money would be on the tank strainer.(filter inside the tank where the fuel is drawn from the tank along the fel pipes to the engine.)

i replaced mine on my w210 e class, cant remember how much it was but a new strainer and o ring seal was under £20 to buy from dealer.
 
OP
A

Adriana1

Member
Joined
Jul 26, 2009
Messages
12
Reaction score
0
  • Thread Starter
  • Thread starter
  • #6
Still problems with Fuel

Hi Guys still getting problems with the fuel and air in it
I have changed all the clear pipes and the only ones that run without air is thew 2 middle pipes fitted on the top of the main filterthere is one right between the fixing bolts and other that comes of the bottom of a black tube- both are full of fuel theleft hand one did have a solinoid valve of some sort in it but we have removed the valve and just fitted a new pipe, looks like fuel is going into this pipe and comming out the one immediatly below it both have lots of air in them, the right hand side one also has air in it
i havnt yet taken the vehicle out to see if the dying problem has been cured as all this air in the system cant be right.
does anyone know what theis after market solinoid valve could be for? as i said it was fitted to the top l/h clear pipe when looking from the front??
Also does anyone have a diagram of the fuel pipe layout so I can trace which pipe goes where??
lastly as Turbo Pete say is this now looking like the fuel tank strainer if so is this a big job???
Thanks to all
Adrian
 

turbopete

Senior Member
Joined
Feb 4, 2009
Messages
14,204
Reaction score
328
Age
46
Location
Spennymoor
Your Mercedes
2010 '60' Ford Mondeo 2.0TDCi Zetec (sorry)
it may be slightly easier on an estate as the tank is under the car, not in the boot behind the back seats. it took me about 2 hours to change it on my e class, with nothing more specialised than a jack, axle stands, a bit of carpet to lie on, cans to drain the fuel into, a funnel and some spanners. theres a post i did of mine in the diy section, come to think of it! different car, but it should give you a rough idea.
 
OP
A

Adriana1

Member
Joined
Jul 26, 2009
Messages
12
Reaction score
0
  • Thread Starter
  • Thread starter
  • #8
still got problems

Pete
I have changed all the pipes still got the air in the pies, checked with local suppliers and they say this vehciel doesnt list a fuel strainer for it?? where might I find it??
Alos the left hand clear hose connected to the top of the filter hosuing had a non return valve in it any idea what this might be for
cheers
adrian
 

turbopete

Senior Member
Joined
Feb 4, 2009
Messages
14,204
Reaction score
328
Age
46
Location
Spennymoor
Your Mercedes
2010 '60' Ford Mondeo 2.0TDCi Zetec (sorry)
the left pipe of the 3 together is the return feed to the tank. this prevents air being drawn in from the return line so yes, its needed. unlikely to be aftermarket, it should be a black unit on the end of a plastic pipe connected to the injector pump. its possible that a 202 c class wont have a tank strainer. i would have to look it up myself.
 


Online parts website for Mercedes:www.partsformercedes-benz.com
Parts for Mercedes-Benz provides a wide choice of OEM (Original Mercedes), quality aftermarket and performance mercedes parts at competitive prices. Our clear, easy to use online store takes the headache out of having to search for that part or accessory you need, with a service that is second to none.
Top Bottom