Does the punto 75 have a charcoal canister (for catching excess fuel vapor from the fuel system). If so, where is it - and how is it connected?

I would very much doubt it

although our late cavalier used to have something like that, it was a fit for life jobby though and if it needed replacing it was because something more serious was afoot

reason i ask is because Cinquecentos have them, and the ECU throws its toys out the pram if you unplug.. and it connects to the EFI unit.. and i can't see any where on the Punto 75 setup to connect it to.

The Punto 75 and Cinquecento are of the same age, so i would expect them both to have them.

Does ePER drop any hints?

tom has just told me this;

it connects from the intake stream to the fueltank

jsut has a look on eper, and it does look like the fuel is meant to go right through it.. but there is nothing on the P75 fuel rail that imo would connect to the canister like on the cinq.

I wonder what would happen if i just didnt plumb it in, but left it there to keep the ECU happy?

On the cinq how it works is a bit like:

Can is connected to the tank at all times. Fuel vapour collects in it and is fed back in short bursts to the throttle body under certain conditions, via the solenoid valve built into the can. There should be no liquid fuel fed into it or drawn from it.

I'd imagine the 75 will have it plumbed into the throttle body in a similar manner to the cinq.

Hello Arc,
Yes they definitely have them, my `94 75 does anyway and I guess they wouldn't have deleted it later on. Its located just under the air box intake (at the very front on the driver side). How its connected I would not know, but could take some pictures if required.

*goes out to garden*

*comes back*
yep defently one there, blue pipe looks like it went to tb other metal pipe coes off under the car, i reckon its going to the tank

it makes no sense to enter the TB though.. there is no fueling going on in there. I only spotted two pipes on the fuel rail, one bringing fuel in and the other being the return.

Some photos would be handy if you could Phil, ta.

There is a 75 in the scrappy near me, i'll have to go take a peek at that when i get a chance later in the week.

arc, it's excess fuel vapour it's burning - it isn't connected to the fuel pump or pressurised lines in any way. It's waste gas its re-burning, kinda like the crankcase vent.

i thought it was returned to the tank, ie pressure held in the canister and then every now and again purged back tankward..

hmm.. i should've had a better look at the MPI tb before i boxed it up ready to be posted!

Heres some piccys.

The canister;


Where the 2 pipes and wires goes from the canister;


Where the wires go onto the cars loom;


Where the blue pipe goes into the back of the throttle body;

thanks

I got all confused when i thought that it should be connecting to the fuel rail, i've already boxed up the TB ready to be sent, so couldnt check on that!

always wondered what that thing is, its part electrical and part water related or fresh fuel related I always thought, well now I know!!


BTW all the puntos I've seen from 55-85 have them, not sure about 90

cracked/unplugged charcoal canister pipe = mot emission test fail?

flisko said:

cracked/unplugged charcoal canister pipe = mot emission test fail?

Click to expand...

Depends on readings at time of test id guess,

where is pipe cracked,?

its a rave from the grave
nothing to see
please move along
mods
are you reading
its a mk 1 thready
anyway

s and b said:

its a rave from the grave
nothing to see
please move along
mods
are you reading
its a mk 1 thready
anyway

Click to expand...

problem?

Mk1 in mk2a/b section,

problem ?

why shouid there be ..only pointing out youve posted mk1 related into mk2 section here id think,