[DML] Re: Fuel plunger sticking

["blackaddertoo" <blackaddertoo@xxxxxxxxxxx>]

Hi

i am currently restoring my car and have similar symptyms.
does the car idle atall?.

mine struggled (would die after 30 seconds)

with the plate depressed 5mm would run ok.
i therefore adjusted the co screw 1/4 turn clockwise.
the started and ran for 10 minutes (temp 1/4-1/5)...then died again.
would not restart, even jumping the cold start valve.
now iv'e checked the complete idle system (perhaps you should?).
and now i'm moving onto the lambda.
what happens with your car if you unplug the lambda ecu? will she 
run?.
i cleaned the plunger in my car with acetone.
just undo the three screws and lift very carefully to peer between 
the gap as you don't want the plunger to drop and hit anything.
i then soaked overnight and put back in. note the orientation.

as far as a know any scratch will render it no good.
the slots in it for instance are 0.2mm i think and barely able to 
see, so a scratch will enable petrol to flow where it shouldn't 
perhaps.

also the metering flap should be hard to push down due to the fuel 
pressure (and at rest pressure)

hope this helps. when i find my exact fault i'll post.

Regards

Steve







--- In dmcnews@xxxxxxxxxxxxxxx, "David Teitelbaum" <jtrealty@...> 
wrote:
>
> It is posssible that the plunger is sticking. If you are real 
careful
> you can take the mixture unit apart and wash the plunger with a 
soft
> cloth and acetone. There could be other things that can also cause
> similar problems. Make sure the air sensor is centered and DOES NOT
> TOUCH THE SIDES OF THE VENTURI. The rest position can also be
> adjusted. If the plunger is damaged, depending on where and how 
bad,
> it might be possible to polish out a scratch. This kind of stuff is
> best left to someone with some experience but if it is already 
damaged
> then you can't do much worse to it! Again, make sure the frequency
> valve is buzzing. A dead Lambda would cause these symptoms. A bad 
CPR
> can also look like this so recheck the vacuum lines to it.
> David Teitelbaum
> vin 10757
> 
> 
> 
> --- In dmcnews@xxxxxxxxxxxxxxx, "valleyrat12" <valleyrat12@> wrote:
> >
> > Well, Well, Well...
> > 
> > I started my car this morning and it did its usuall BS (see 
below) 
> > but this time I decided to go back to the engine after I got it 
> > running but before I could accellerate (it would die if I 
depressed 
> > the accellerator) I turned the spindle while slightly depressing 
the 
> > air meter and the thing un stuck from a semi closed position! 
Now, so 
> > far it has only happened when the car is cold. Is it possible 
for 
> > heat to cause the plunger to free up? I assume I need to clean 
the 
> > plunger. I am worried that the PO put a scratch on it, if he did 
it 
> > needs replacing right?
> > 
> > this could potentially explain both of my problems right?:
> > 
> > 1) engine fires up and dies immediately taking several attempts 
> > before it will stay running. 
> > 
> > 2) Engine will not accellerate once it is running, if the 
throttle is 
> > depressed the engine will die.
> > 
> > It must seem like my car is a real basket case but it really 
isn't, 
> > or thats what I keep telling my wife! :0)  
> > 
> > Nathan
> > 2277
> >
>








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