General help me please guys!

[Louie Bee]

Tank Vent / ECU Reset

Hi J
See-
https://www.fiatforum.com/attachment.php?attachmentid=3016

It outlines the IE fuel system on FIRE (1.0 & 1.1) and Non FIRE (1.4-non Turbo) wi SPI fuel systems…

As you drive and fuel is pumped out of the tank, air has to enter at the same rate (replacing vacuum). If this airflow were restricted, so would the fuel flow be… car stalls.

After stalling and 5 minuets or so the car would be able to restart, driving ok again for a while. :Edit: Similar symptoms to Distributor wi faulty connection / cooling lol.

If you try restarting immediately, with no luck, remove the fuel filler cap, letting air in and fuel through, car should restart Very soon after (Wi cap replaced). – Problem located (tank breather valve) – not solved…

Other than that perhaps a blocked CAT or fuel pump problem?

The Uno 70 IE has breaker less ignition I believe – I Can’t say I’ve ever seen one… They will have a chip Wi transistors, and a magnet / pickup (instead of mecanical points) so less clutter.

When you’ve fixed the problem, don’t forget to reset the ECU its memory will be full of stalls… :-

…The ECU is reset by disconnecting the battery which you have done for some time. [30 min] Then reconnect, start the engine and let it idle until fan cuts in. Shut off engine. ECU is now reset.

Morten.

 

[uno70]

my dad claims theres no vacuum advance on my car and theres no electric modual !

so were arguing at the mo!

 

[Luke]

my dad claims theres no vacuum advance on my car and theres no electric modual !

so were arguing at the mo!

look on the side of the distrubitor, if theres a round valve looking thing then thats the vacuum advance. Should have a pipe going to the throttle body from it too.

It should have one i think

 

[uno70]

ive looked and looked and looked and there is no sign of a vacuum advance unit unless i missed it but i doubt i did!!

 

[uno70]

bin out 2day in it and tried feul cap trick but didnt work also wen took the lead of off the spark plug there was no spark??? wen i turned ignition over.My nan had a similar problem with her uno but hers was a 999cc start hers was the fuel pump or something similar i need to fix it mite take it to a local garage let them sort it! but i cant afford it! :bang:

wiring looks absouloutely sha*gged under the bonnet!
FIATS!

 

[Morty Mort]

Hei.

This is not a FIRE engine is it? I think the layout of the 1.4 and 1.5 engines are different. Propably there is not a vacuum advance unit. Has it ever overheated? Our Ritmo TC130 Abarth overheated, and actually ruined the exhaust cam which would not open the exhaust valve.

Is it injected then it´s propably not a SPi (monopoint) as the smaller FIRE engines. Carburettor? Weber / Solex?

Might be way off, but check the cam.

Morten.

 

[uno70]

im gona try resetting the ecu!

see if that duz ote!

 

[Louie Bee]

Re: Tank Vent / ECU Reset

Hi J...

I Can’t say I’ve ever seen one… They will have a chip Wi transistors, and a magnet / pickup (instead of mechanical points) so less clutter.:-[/COLOR]

- Engine bay of a 1.4IE…

...
When you’ve fixed the problem, don’t forget to reset the ECU its memory will be full of stalls… :-[/COLOR]

Perhaps not worth doing till running smoothlyGood Luck M8.

Kind Regards,

 

[uno70]

hi
cheers for the help ill try figure it out

 

[alexGS]

Someone had a hot-starting problem with a Tipo and I suggested replacing the crankshaft position sensor. It fixed the problem.

So if your Uno has a 'top-shelf' ignition system (like a Tipo DGT or an Uno Turbo has) without distributor pickup, then you need to find the crankshaft position sensor and try replacing it... I think it's at the cambelt-end of the motor, near the bottom pulley -or you could just give in and call out one of the electronic diagnostic technicians

The theory is that the sensor has a very fine coil of wire which develops a split. The problem only becomes apparent when the engine is hot, because the coil expands slightly and loses the contact. I *think* the ECU only uses the crank angle sensor to start off the firing as the engine cranks. This explains why it's only the re-starting that's a problem. Once the engine is running, the ECU uses the engine speed sensor instead (flywheel teeth-counter).

Incidentally I'm pretty certain that if you have the Digiplex ignition (like the Tipo) then your distributor will be on the end of the camshaft, rather than block-mounted.

-Alex

 

[uno70]

hi
right then ive decided to

change plugs,leads, coil

and ill definetly be looking into changing the crank sensor?

hopefully itll sort it !

cheers
j

 

[alexGS]

I think Luke had the best answer - "welcome to the world of troublesome hot Uno problems"!

I laugh every time I see that answer on page 1, because I've been baffled by more than my fair share of hot Uno problems!

I think I would personally leave the plugs and leads for the time being (might as well save a little money), if faulty, they usually cause misfires while driving, not just a complete cut-out and no starting.

Before spending too much money, it would probably pay to get one more opinion from a skilled electronics engine management technician near you... it could save you in the long run... still, I guess if the crank angle sensor is CHEAPER than the skilled technician, then go for it

I can't remember if we've tried to eliminate the fuel system yet, either? So, maybe it is possible that you have a faulty fuel pump relay, etc? you really need some way to check if you are getting petrol injected while you are trying to re-start. Perhaps crank for a while and then remove a plug to see if it is wet.

-Alex

 

[Morty Mort]

The sensor is worth a try. Fixed our problem with the Strada/Ritmo Abarth 130 TC a year ago. That´s also a Digiplex. Cheap as well.

Morten.

 

[F R O S T Y]

i would say check the sensor too. As alex mentioned before the coils hardly ever fail so it is more likely to be an electrical fault somewhere along the line. I had an ignition problem a while back on my uno turbo which turned out to be a slightly burnt out wire going to the sensor on the gearbox. Good luck and let us know how it goes.

F R O $ T Y

 

[uno70]

cheers for the help guys

just one more question where is the crank location sensor loctated on the car????

cheers

j