non starter 1988 190 e

[turbo18zx]

any ideas my friends car started as usual first time then stalled at the end of his drive after wich would not start.
checked spark loads of
checked fuel line to injector pump switched on ignition pumped for a few seconds then stopped turned motor over and continously pumped out fuel
slacked off injector lines top of pump turned motor over but only got slight seepage of fuel
tried this with air flap open as well as closed
occaisionally gives a very week attempt at starting
am i right in thinking fuel starvation problem ?
can any one help in diagnosis please
:?:

 

[flagstaff]

fuel pump relay

situated behind battery. check whether fuse on top of relay has blown. intact fuse does NOT mean relay is good.

after that, check OVP relay next door.

 

[Placey]

If the problem is the FPR, it is worth bearing in mind that the part can be fixed / lubricated without the need to replace the item at around £150. Not everyone will risk taking them apart!

If you can, try it with a known good one to test.

 

[turbo18zx]

will check in the morning and let you know thank you

 

[turbo18zx]

found the relay in question had red top with 2 x 10a fuses these were ok when switching ignition to on relay pulled in and fuel pump kicked up for
3 seconds then dropped out is this correct
how does it come apart tried pulling at bottom but seems to be stuck

 

[Andy]

Hi

I would check that the air pipe under neath the injection system has not blown off or off the idle control valve. You shoudn't be able to miss it. Big bore black pipe under neath the metering unit.


Good luck


Regards

Andy@ www.mercedesservicing.com

 

[turbo18zx]

thanks andy will see if i can find it and post result
this is going to be quite a marathon i think ha ha

 

[turbo18zx]

if i got the right pipe its ok
comes out about bottom middle of injector unit goes into a cylinder with electrical conector on other end then comes out and goes down to block through middle of intake manifold?

took out injector on no. 5 cyl turned engine over nothing from injector
took pipe off end of injector and turned engine over and got a small amount of fuel doesnt seem alot

whilst checking these i noticed a pool of fluid in the inlet manifold under the butterfly valve which turned out to be petrol
could it be running down the manifold from injectors? confused as they dont appear to deliver

 

[Andy]

Hi

Sounds as if you have found the right pipe. You can't check the injectors in the way you have described. Its normal to find excess fuel in the bottom of the plenham chamber. Usually on high millage vehicles.


If you have checked the normal stuff. Then I can only suggest you get it into your local specialist.


Regards

Andy@ www.mercedesservicing.com

 

[turbo18zx]

update
is now running fine
after checking fuel pressures and relays
pulled off dizzy cap although got good spark and was replaced new with rotor 3 months ago
ohh la la no center carbon
just goes to show the old addage dont take anything for granted
thanks for all your help im a bit better aquainted with mercedes now
all the best
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