Technical No fuel return

[dpr1974]

Hi, Why did Fiat make the 1.8 16v so much different to the other engines?

Anyway, my problem. for the last few days there has been an increasing smell of petrol and i after doing some checking i thought the fuel regulator was faulty.
Where is the regulator because to find out what it looked like, i checked on google and every place i went to buy one. they were out of stock and. i did read somewhere that it was in the fuel tank?
Putting the regulator aside for a minute, further checking showed that there was no fuel returning.
This is the strange part because there doesn't appear to be a return? i've taken the injector rail off and there is only the input and the four injectors.
there is an return pipe and the best i can work out is it it connected just below the throttle housing into a two wire (i think) switch.
it seems odd to have the return so far away from the fuel rail.

So does this switch block by the throttle housing control the return? if not what could be causing the lack of fuel return and where is the fuel regulator.

Any help would be greatly apprecated.
Thanks.

David.

 

[dpr1974]

I found this image. the two blue pipes on the right hand side. the light blue is the return pipe and the darker blue loops back to the throttle housing.
Could this be the cause for the fuel not returning?

Edit: the more i look at this, the more i think that could be a fuel pressure switch and somehow the fuel return in molded into the intake manifold. which still doesn't help me identify the fault.

Thanks

 

[astacheva]

Actually the blue lines belong to the evap system.
Sadly our 1.8's don't have a fuel return line. Don't know why Fiat manage to remove it because the barchetta has one and it's the same engine only with an iron intake manifold and some other analog stuff.

 

[dpr1974]

Soooo, apparently modern cars have what's called a returnless fuel system, which appears to be what's going on with my car.
There's clearly a problem as the pressure is to much but i am looking into changing it to a return fuel system now.
My car is a project car and the change in fuel tank and pump assembly might have started this problem.
I would still like to know what the cause is if any one knows but the more important question now is where is the Fuel Pump Driver Module and can i simply remove this to have the pump running at a 100% all the time or do i have to wire in a by pass etc.

Thanks.

 

[dpr1974]

Sorry, i didn't see your reply before i posted mine.
I think you're right about the pipe, it's the evap which also has something to do with the returnless system.
Thanks.