Hi guys

Tried to start the S1 for the first time in a year today after its resto, and i have a slight problem. It runs for a couple of secs then cuts out.

Now i have checked all the obvious and we have a spark, and the fuel pump primes. There is fuel in the fuel filter, and its under pressure to the metering head. If you crack open the four nuts on top of the metering head then there is fuel inside there, but when you try and turn it over with these open, there is no fuel coming up out of them.

I have tried taking off the injector pipe and cranking it, and there is no fuel coming out the injector pipe at the injector.....so its getting as far as into the metering head itself, but not up through the injector pipes...

There IS fuel in the pipe for the cold start valve though

Can anyone offer any help ?

Knew i would get some problems after a year, so this is the first one....

Is the metering head shagged ?

Both the electrical connections on it seem ok (KE Jetronic Plugs)

Any help much appreciated.

 

r all pipes on propley as if there is an air leak it wont run
check the boost bipes and the breather return to the metering unit thats all i can think of

 

Do you mean the hoses going onto the metering unit itself or in general ?

 

Looks like it could be the control plunger that is connected to the air intake flap arm and distributes the fuel to the injector hoses. It probably runs through "O" rings which may have become sticky since the car has been idle. It may mean taking off the top plate on the distribution block to free it off so you may need a seal kit, if you can still get them.

Try having a look at this http://www.benzworld.org/forums/w116...eshooting.html it may be of some use to you.

Steve

 

Just having a look now dude, get to bed..... u have work to do again tomorrow.

 

Hey guys

I have tried all the above.....for two nights and its really starting to do my fcukin head in.

We have done the following tonight now....

We have established that there is fuel getting to the Metering head. But when you hold the flap down and crank the engine, there is just no fuel whatsoever coming out of the 4 bolt holes. Nothing. You just see it sitting there. It just will NOT pressure up the pipes to the injectors at all. The cold start is the only one getting fuel, but thats to be expected as its on the same line as the return feed....this i assume is enough to keep the engine running for its couple of seconds, before it cuts out again.

So tonight.......we have now tapped the top of the metering head to see if the plunger was possibly stuck.....there is pressure when u push the air flap down, but not sure how much there SHOULD be....but theres a bit.

We also took off the multiplug to the Electro Magnetic Activated Actuator on the side of the Metering head.....there is power getting to that. We took off the Actuator itself from the side of the metering head, applied voltage across the terminals, and that is clicking too.....opening the small hole in it, and allowing fluid to flow. So thats working too....put that back on. So we know there is fuel pressure to the metering head, the air flap is operating, and the actuator on the side of the metering head is working ok. (I assume thats what its supposed to do when it gets a +V ?)

The only other thing i can think of now, is if the fuel needle is stuck in the "up" position and gunked up or the O-Rings are gunked ?

I say this because, i assume when u push the flap down, the lever on it pushed the needle up, and the fuel is distributed through the slats in the needle....the further up the needle travels, and further down the flap, then the more fuel flows to the injectors ? Yes ?

So if the lever is moving upward, but the needle is gunked up and possibly stuck in the upward position, or clogged, then no fuel pressure will be getting through am i right ?
Is this a common prob ? I really cant think of anything else left to try !!Its getting fuel to the metering head, theres power to the magnetic actuator, the flap is working......but no fuel when u open the bolts and crank it over....no fuel coming out that is....but fuel IS there.

Therfore what do i need to do to strip and clean the Metering head ? And can i get new O-Rings or a rebuild kit for it ? Is it ok to do ?

Any help appreciated again...

Cheers

Michael

 

Woohoo its started and running !!

After speaking to Stu at MSD and a few of you guys, i have got it started !
Seems like it was a combination of an air lock, and me doing the wrong stuff lol

I am now happy to announce that i have a running AND RUNNING WELL S1 rs turbo though, all i need now is a new MOT on her, tax, alignment etc done, and a few small jobs finished....

WOO HOO !!

Thanks to everyone on here who helped, and Stu @ MSD !!! Top Man

 

Can you please tell me how you got it running as i have the same problem as you had.

 

Just out of interest what did Stu advise you to do?

 

yea please help !