General uno - driving problems !!

[premrajeev]

Hi all,

Need some help from experienced fellows :

Well my uno has developed some bloody trouble..

I was driving her real hard on this sunday night and after some 10-15kms she started coughing and sneezing and stopped. Then she was not starting art all..

I pulled the choke and started, and it started ..but when i press the accelerator it stopped again, so managed to drive her back home without accelerator and gear (on 1st gear)..

i doubt the carburettor ?? or is it the ignition module just above the distributor ?

mine is a 999 cc carburetted engine.

 

[The Sultan]

you may have it right their mine failed but my simtems were it whouldent start when hot
but frankly i cant fink of anything else less something has got stuck in the fuel side of your carb

mine howether was single point injection not carb

 

[5doorturbo]

mine died once or twice, just after i had to drop the fuel tank to change a rear brake pipe...reckon it was just dirty fuel.

have you done any maintainence involving dropping the fuel tank?

 

[premrajeev]

Dear Friends,

The fuel tank was my prime suspect...and it was cleaned afterwards,but not many residues were found.

The fuel line is clean,too.

what would be my next check point?

 

[(CZ)enda]

Fuel filter clogged.
Air filter clogged.
Jets in the carb clogged.
Accelerator nozzle (enrichment pump nozzle, whatever they call it in the Book of Lies) clogged.

Huh... there are so many possibilities I cannot think of them all.. But it sounds more like a problem with fuel than electricity...

 

[alexGS]

I agree with (CZ)enda and my first bet would be a blocked main jet in the carburettor.

-Alex

 

[premrajeev]

Thanks alex and czenda.

Well,

Fuel / air filter fine.
Carb jets are not clogged, but not sure of their position though..

any advise on opening a webber carb ??

Mayb i need a new packing if i remove it from the mounting ??

here is a pic of the completed paintwork..

she looks much better now, but drives worst than b4

help needed indeed...

 

[SuperUno]

Could be a daft one this, but if it was cold then you could have been suffering from carb' icing where the carb gets to cold to allow fuel to atomise and thus it doesn't run propely, only really happens when you drive hard and in cold/wet conditions.

 

[(CZ)enda]

Get Haynes manual from a fellow FF member:
http://www.zone.ee/eatmyshiit/unomanual.pdf
which covers the carburettor in more detail that I can supply right now. If you have Weber 32 TLF, I have its drawing somewhere, which may be more detailed.

Generally, if you remove the carb, it should not be necessary to change the gasket between the carb and the manifold. A complete set of gaskets, diaphragms, rings etc. is available where I live, but i cannot remember the manufacturer - I may still have the empty box somewhere

 

[Shekhar]

Hi Prem,

My Uno is doing exactly the same thing!! None of you replied to my earlier post... . The trouble is, she starts fine, then after being driven through traffic, starts acting up. If I switch her off, she does'nt start again until after an hour or so. The fiat guys at Anuroop auto seem to think its the carb. (some slow running jet). I am very worried, looks like I'll have to junk her.

 

[Chas Uno]

Hi Prem,

My Uno is doing exactly the same thing!! None of you replied to my earlier post... . The trouble is, she starts fine, then after being driven through traffic, starts acting up. If I switch her off, she does'nt start again until after an hour or so. The fiat guys at Anuroop auto seem to think its the carb. (some slow running jet). I am very worried, looks like I'll have to junk her.

Yours sounds more like that the ignition module (bolted to the side of the distributor) is playing up. They overheat when they start to fail, causing misfiring, poor running and starting problems. After being stood for a while they cool down and the car runs fine until it warms up again i.e. driving through traffic.

Prem, not sure what to suggest that hasn't already been suggested. Was there anything changed on the engine during the restoration? Or was the engine totally untouched? Ideally you should go over the ignition and fuel systems to make sure all is in place as it should be. Check plug gaps, ignition timing, spark plug leads/ spark plugs, distributor cap, rotor arm, fuel pump, vacuum pipes, vacuum unit on the the distributor, all pipes etc. etc. It will be a process of elimination, and one by one if you go through it you'll soon isolate the fault.

Car is looking good in its new colour! Any more pictures?

 

[premrajeev]

hell !!

No luck..

The whole day was being spent (didnt even attend office 4 dat)on the carb and fuel line trying for probs..

checked the fuel pump and was fine...1/2 litre in 10 secs or so was the discharge rate which was quiet enough...(hose disconnectd from carb)

then removed the whole carb away but didnt do anything bcoz i never knew what to do..have haynes manual,but i didnt see anything to do after reading it. funny right ??

reassembled the whole thing back, and started, the same prob still is there !
What to do ??

who the **** made webber carburettor man?? there are thousands of simple alternatives in the world, my other car is using a mikuni one, which is a beauty to dismantle n reassemble...

bloody fiat dealers...seems my next stop will be one of their service stations............

But, out of 100, they are unable to solve 80 of the faulty cars !!

Long live fiat afterservice !!

That way we r forced to be our own mechanics....

i am going to change the distributor ignition module and chech what happens then...



Will post more photos once i'm finished with her..

 

[antsuno2]

he he i bought 2 uno turbo's for £500, one a spares car in the loft, when i get a problem, i get my spare and replace it see if its the prob, sounds like a common fault your talking about, one of the only things, it will give you years of service if stroked, take care of her!, and your not paying £80 an hour labour, main dealer, last resort for not mechanic friendly person, these cars are old real fiats and easy! good luck Ant!

 

[The Sultan]

alot of dealers dont have alot of talented mechanics who now what their doing with carbs these days

or they just cant be bothered to spend the time tracking what will probably tern out to be a simple fault on your car

i whould say if you dont want to venture in to the relms of diamantleing your car try blowing throu a few pipes to see if you cant unblock it if it is blocked in some way

or find another uno to swap it for mabey someone might lend you theirs for a test

i know it's a long shot

 

[premrajeev]

hmm

i am going to do exactly te same..

waiting for my friend to come with his uno for a swap test........

any more details ,alex , czenda, anyone.........


:bang: :bang: :bang:

 

[Shekhar]

Hi Guys,

The guys at Fiat just replaced the ignition module! So I doubt if that can be a problem. I am worried about the carb. and after taking it to the dealer so often, I have lost my faith in the guy. Can anyone suggest what could possibly be the problem with the carb for a car that's done just 26,000 Kms. and has been serviced regularly. Just a point....last time the fiat guy changed the carb. kit and charged me for tuning up. If the carb was faulty, should he not have been able to tell me right then...or is he just taking me for a ride?

 

[premrajeev]

shekar,

just after replacing the ign.module, still your car is not performing better..???

where the hell do u service yr car ??

new TATA FIAT of blodddy old fiat dealer ??

how much they charge for the ign.module ? and how much for the carb. service kit n service??

very keen to know.

 

[Shekhar]

Hi Prem,

Yeah man. Am damn cheesed off. Tell you the sequence of events:

1. Car running fine, till one day starts stalling at idle. No problem in starting after that, just started stalling at signals and so forth

2. Spoke to Anuroop auto, (old fiat dealer), took the car to them, they said it would cost me 6 grand to set right

3. Was not happy with the attitude of the person there, wrote to fiat India asking for some better service point. Spoke to a guy called Mangesh at Fiat India, he said Anuroop is the best guy to service the car

4. Got the car serviced at Anuroop, paid them the damn money, still in two days, the car started giving trouble. She simply would refuse to start...despite numerous cranking attempts. Took the car back to them....they said it was the spark plugs. Specifically asked them to tell me about the carb. they said it was OK

5. Again started giving trouble, so much so that now it just refuses to start. Spoke to Mangesh rom Fiat again, says there could be trouble with the carb.

6. I now may have to tow the car to Anuroop at a cost of 700 bucks.

7. Why the hell did'nt anuroop tell me about the problem when they serviced the carb in the first place??

8. I am fed up. Would most probably junk the damn thing and never ever buy a fiat in my life again. Feels sorry for a car that has just run 26000 kms. and has been maintained so reularly. But, dunno what else I can do.

9. To answer your question: Carb. Kit is 850, Some stupid cleaning spray: 250, labour 750 and ignition module 1600

Please tell me if there is any other mechanic whom I can give my car to

 

[The Sultan]

this is a long shot but

mabey you are sufering from valves cuming open when the engine is warm your tapets might be set to close so as the engine warms up they are staying open
this seems quite likely to me if you have swaped carbs with no improvement

 

[The Sultan]

i just had another idea as i worked on one today with the same problem

it might be fuel has made it's way down the pipe to the distributer vacum advance and split the diafram fiat later solved this problem with a fuel trap but yours may not have it

to test this piece you should folow the pipe to the inlet manifold and take it off try sucking throu it if you can form and sustain a vacum in it it is fine if not this may be your problem

it is also very easy to replace 2 screws and a cind of ball clip inside to faf with to get it off new one just pops into place

dont even have to remove the dizy