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Discussion Starter #1
I am hoping the knowledgeable members on here can help!

I have a 2005 GT 3.2. The car had been stored over winter in a Carcoon (on a battery conditioner/charge). Fully serviced before "hibernation"

The MOT is now due and with such good weather, the time came to fire the old girl up and off we go.....or not. The engine cranks - at a very good speed - and fires almost immediately. Runs for 1-2 seconds and stops....abruptly. It doesn't stutter to a stop or misfire - just stops.

I have checked :
Fuel pump - OK
Fuel getting to rail - OK
Disconnected MAF - no difference
MultiECUScan - no errors
Checked/clean 3 relays by battery - sparkly clean

I am at a loss. The only slighlty concerning point I did notice - when the engine abruptly stops, there is a slight "pfutt" - akin to an old carb model blow-back when the timing is retarded? There is also a very strong smell of petrol in the Carcoon now - despite the door being open - which is surprising (to me) as the car has not been cranking endlessly. It start very quickly - and stops just as quickly

Is it possible for the belt to jump a tooth when starting? The car drove faultlessly prior to the lay-up. Could someone tell me the possible symptoms of a jumped belt?

Any suggestions as to what else I can try?

All help gratefully received:happy:
 

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How many times have you started it?

I remember when I rebuilt my 3.2 it did similar, fired up, then shut down. With each go it ran a little longer, and you could hear it running on 2,3, then 4 cylinders. At 4 it "ran", and I let it run, thinking if there was any damage, it was done by now. Suddenly the last 2 kicked in and she was fine. I think my problem was air in the fuel rails.

With MES, you can activate injectors one by one. Do you hear them clicking, and does the cylinder smell of petrol after you have activated them a few times?
 

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Discussion Starter #3
How many times have you started it?

I remember when I rebuilt my 3.2 it did similar, fired up, then shut down. With each go it ran a little longer, and you could hear it running on 2,3, then 4 cylinders. At 4 it "ran", and I let it run, thinking if there was any damage, it was done by now. Suddenly the last 2 kicked in and she was fine. I think my problem was air in the fuel rails.

With MES, you can activate injectors one by one. Do you hear them clicking, and does the cylinder smell of petrol after you have activated them a few times?
The injectors all fired correclty with MES. I tried to start it roughtly 15 times.

At that point - with the "pftt" noises - I started to wimp out! I did think it was air in the fuel rail/injectors, having searched on this forum! Sadly, no.

Thanks for your input!
 

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it is very possible for the belt to jump on start up as there is no inertia, unlike when the engine is already running. The 3.2 IIRC needs the belt changing more frequently than other bussos for some reason. When was it last changed?
 

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Discussion Starter #7
it is very possible for the belt to jump on start up as there is no inertia, unlike when the engine is already running. The 3.2 IIRC needs the belt changing more frequently than other bussos for some reason. When was it last changed?
Yes - this is something which does concern me.....

The belts etc were changed March last year, by a well-known Alfa specialist, so they should be OK for a while! I am trying to put off the inevitable - but I think that is my next logical step - to check the timing belt :(
 

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A jumped belt should not be causing these issues. The car will either run (badly), or not run. You'll also get cam phase errors.

What sort of diagnostic gear do you have? The ECU is either killing the sparks or the petrol. Pinning that down would help. Sparks - I'd be looking at security systems or any of the inputs that tell the ECU the engine is running - crank sensor etc. Petrol - I'd be looking at the mail rail pressure. An oscilloscope would be handy .....!
 

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A bad airleak will do this - is the air intake pipe securely attached to the throttlebody?
 

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I would say your fuel pump is faulty. The first clue was the fuel smell in the cabin.

the 147/156/GT all use fuel pumps of similar design and build, they all have a plastic "Crown" as the top, and with age this area becomes brittle and they have a tendency to crack and leak through this top "crown" area. The usual tell tale sign is a strong fuel odour inside the cabin or at the rear of the car.

If the cracks become serious it can actually impair the operation of the pump and cause it to fail, as the main fuel line connects to a plastic "Spigot" on the crown.

The second hint was the "splutter" when the engine stops . . . just like a carburettor car that runs out of fuel . . .hmmm?
I would take a guess and surmise that while the pump initially operates, and gives enough fuel to the engine to start it fails almost immediately or simply cannot maintain supply/pressure . . .thus the engine the engine dies.

Its not hard to get to the pump, you just need to remove the rear seats to get to the access cover, take the cover off and you will be staring at the top of the pump. If you see ANY fuel anywhere in the area, well you have found your problem.

Then again, I could be completely wrong, but at least it's easy to confirm of not, and you can do it with simple tools.

Baz
 

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Discussion Starter #11
OK - time to admit just how stupid some people can be (me).

I had previously sent my intake runners away to be re-chromed (they do look awesome, BTW). Whilst doing so, I noticed the rubber hoses were cracked and brittle. So I thought - let's spiv things up a bit. So - scorning the genuine Alfa parts - I bought some shiny silicon hoses, which looked alright-ish.

These were duly fitted whilst the car was in hibernation.

So, fast forward 3 months and I can't start the car. Didn't occur to me for one minute that it could be badly fitting hoses. :embarrassed:

Thank you to everyone for all the excellent suggestions - Pud237 - spot on with an air leak! Genuine parts now fitted!

It was an Alfa specialist not too far from me - Waterfall Garage, Bridgend - who managed to diagnose my self-inflicted problem by spending 30 minutes patiently going through all potential issues on the phone.....free of charge. Superb!

I do feel an idiot, with hindsight. But isn''t that always the case:hehe:
 
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