not starting suddenly ?

[peanut]

how odd is that. My S2 which has stated on the button every day for months suddenly refused to start this morning ?
I have been using my work car all this week so the S2 hasn't been started since last weekend but before that it was doing over 100 miles a day.!

It turns over really strongly but there is only just a hint of catching occasionally but its so slight you'd hardly notice it.
Although the DME relay is not often the culpret with cold start problems I pulled it checked it and thats fine. (DME RELAY IS FINE)

Not sure how I can check the fuel supply really with injection. You really need a fuel guage.
I'll get someone to turn it over for me on the w/e so I can check the fuel pump is working and check the spark at the coil and plugs etc.

Can't believe it could pack up just like that with no warning symptoms.

I suppose it could be my immobiliser [:-]

 

[zcacogp]

I hate threads like this.

I'm sure my S2 is reading it and will decide to follow suit, just when I really need to drive it!


Oli.

 

[peanut]

[][][][]
Too late !.....[]

 

[Fred Hindle]

What else does your immobiliser immobilise? Mine cuts off the starter so it won't even turn over if immobiliser is activated (I never know if you should say on or off).
Is there a seperate fuse for the fuel pump?

Check ignition leads etc.

Cheers,

 

[homesea]

If it is a CAT immobiliser it needs to have two circuits, most times fuel pump and starter.

 

[sawood12]

Does it not start at all or does it sometimes start and other times doesn't? My car went through a phase of starting intermittently - sometimes it would fire up on firt turn as usual, other times it would turn over with no hint of starting. Turned out it was my reference sensor was loose. If the reference sensor doesn't do it's thing then the ECU will not activate the electric circuit so you get no spark. Take a look - it is on the top of the bell housing - there are two sensors. Make sure they are no loose.

 

[924nutter]

Fred the H had similar problems and posted here and in the 924 section. Get the phillips out and have a peek under the distributor cap. Fred's was shot to hell. The high voltage produced by modern ignition circuits can give reliabilty way beyond the designed gap parameters, but eventually even a modern system cannot compensate. My MK1 golf gti would be great one day, then next day pop,bang bang just as suddenly as that.

http://www.porscheclubgbforum.com/fb.asp?m=350395
and

 

[zcacogp]

ORIGINAL: 924nutter
My MK1 golf gti

Ah, bliss!

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Oli.

 

[will lyons]

Hi Peanut

When my old lux wouldnt start similar problem arose although I had a few days prior run pretty low on fuel .... none at all
one of the group Fen or Martyn Cockram as I recall suggested I loosen the nut on the end of the fuel rail place plenty of rags around the area becuse it is pressurised and turn over once breifly .Obviously check the rags for fuel and if they are fuelled then it is not going to be a pump problem.

This sorted mine instantly as I assume I had an air lock in the fuel rail. Its a quick diagnostic to try but good luck hopefully it will be just that.

Wil

 

[peanut]

thanks guys some good ideas . I'll take a look at the dizzy cos its one of those very special ignition systems with earth straps all over the place ???
I'm inclined rto think fuel as well cos its practically empty but I drove it there so there should be enough to start.[]
have a look tomorrow. Thanks all

 

[Fred Hindle]

With the tank being empty (ish) you may have picked some crap up in the fuel lines and caused a blockage. (But you will have thought of that already).

Cheers,

 

[morris944s2john]

Eliminate the obvious first. If your car is parked outside and its been damp/misty lately then a squirt of WD40 on the leads and distributor car may do the trick. I had this happen to my car.

 

[924nutter]

My 928 spent a year off the road waiting for finances to investigate its inability to rev, would start but barely idle, with no power. Trailered it to Ray's and he stuck in a gallon of juice and off it went, so maybe you can't generate any fuel pressure with what's left in the tank.

 

[924nutter]

Re: Golf Mk1 bliss, If I hadn't stuffed it into the end of a bridge parapet at "70" m'lud miles per hour and snapped the engine from the gear box in the impact, I recon I would still be patching it up and using it for a daily.

 

[peanut]

ORIGINAL: 924nutter

My 928 spent a year off the road waiting for finances to investigate its inability to rev, would start but barely idle, with no power. Trailered it to Ray's and he stuck in a gallon of juice and off it went, so maybe you can't generate any fuel pressure with what's left in the tank.
[/quote

yes that sounds very possible. I'llget a couple of gallons tomorrow and try that first. Boy am
i going to be embarrased if its outta juice []

 

[morris944s2john]

Thats an even more obvious one than damp ignition, is the car out of petrol??

Go back to basics. Is there fuel at the injectors??, is there a spark at the plugs?

 

[Guest]

well peanut come on what was it you sorted it yet dont tell me it was lack of unleaded [:-]

 

[peanut]

Mmmmmmm the mystery deepens.
I put a gallon of petrol in ....nothing. Removed the distributor cap cleaned the points and rotar ...nothing
Tried giving it plenty of throttle and it caught once sort of then cut out again.

I'm convinced its lack of fuel and not electrics. I cannot hear the pump at all ? in fact I cannot find the pump ?![]


anyone know where it is on a S2 ? I can't jack her up at the mo so can't see very much but I want to give it a couple of thumps see what happens. Its difficult doing any testing on your own .I need a remote starter really.

 

[will lyons]

Have you tried removing the end of the fuel rail to see if you have fuel there It worked for mine and another displaying similar problems a non starter advertised on ebay its a simple test to do I did not completely run out of fuel when I had the problem it was a coule of days later but I assure you thats all it was so give it a go but remember plenty of rags because if the pump is ok it will be under pressure

Wil

 

[morris944s2john]

It could be CPU failure. This is the box that sits under the passenger toe board and sends a voltage signal to fire the injectors off. Undo a bolt on the fuel rail to see if you have fuel pressure (with ignition on). Use a timing strobe lamp whilst someone is turning the engine over to see if you have spark.

Then test for voltage at one of the wires to the injectors whilst the engine is being turned over. Failling that, call the AA if you have home start to diagnose the problem.