850 Fiat 850 Coupé Sport

[Widarwidar]

Switched the whole fuel line from the sender unit to electrical fuel pump yesterday.
Didn't even bother to check sender unit since fuel was streaming out steadily after removing old fuel line which suprised me a lot and i had to quickly find a way to plug it.

Pulled the fuel line trough the left rear wing, felt wrong when I had my whole arm inserted in the lamp hole, sorry little Italian lady.
Feels good with fuel line away from the exhaust manifold so I think she forgives me.

Quick test drive around home until warm and problems seems to be gone, didn't stutter after getting warm and fuel filter always had a lot of fuel in it. Going to need to build up my confidence for her steadily and go for longer and longer drives.
Not getting my hopes up before that tho.

 

[Widarwidar]

So she gave up after ~45 minutes driving. Ignition coil super hot. So I'll switch that, should the coil have a resistor or not for a 850?

Edit: or should i use something else since running A112 parts?

 

[timmycm850]

Some have the ballast resistor some don't.

I think it depends on the coil

 

[porta]

So she gave up after ~45 minutes driving. Ignition coil super hot. So I'll switch that, should the coil have a resistor or not for a 850?

Edit: or should i use something else since running A112 parts?

Wiring diagram shows a condenser as I can remember
I posted one on here not so long back, but I’m out n about on farm so can’t confirm

 

[Widarwidar]

Thanks, the condenser is there but thinking of the external resistor.
I'll order a NGK one without and continue my testing.

 

[Widarwidar]

Switched ignition coil, test drove until warm and coil was cooler but will have to do a long test drive when time allows and see if problem persists.

 

[Widarwidar]

Another 10km run and she bogged and died on me. Everything was proper warm but not too hot. Running out of ideas... Carburetor?

 

[Widarwidar]

Wonder if its the external electric fuel pump getting too warm...

 

[timmycm850]

Might sound odd but is your fuel cap venting, could there be too buch vacuum in the tank over that time so it stops the fuel being sucked up from the tank.

Tim

 

[Widarwidar]

Thanks, but already check that with the cap off.

Edit: plus that there was fuel visible in fuel filter going into fuel pump, I had problems earlier that it didn't. I think I'll change the fuel line going into the carb and add another fuel filter between pump and carb.

 

[dragonwagon]

Check for an air leak between the carburettor and intake manifold and intake manifold and head.