iv just bought a 1.4 turbo punto and it was ok but i started driving it and after about a week wen i got to about 10psi on the turbo it started jolting everywer and cuts out everytime can u plz help ?????

Right, it's moved. I've deleted your second thread in Lets Talk Fiat and the other in Site Ideas will be deleted. Please take some time to get to know the forum and post in the correct section. I'm sure someone will answer soon.

cheers m8 are they good in here then do they no wot there on about ???

Generally, yes they do.

ok cheers m8 will they no wer i can get it done do u no any good places to go wid a turbo punto 1.4

When you say it cuts out, do you mean the engine? Not sure why, but I'm thinking of some sort of sensor failure rather than a turbo problem. Do you get the engine indicator light (probably looks like a fuel injector) coming on at all?
H

Re: my turbo is playing up help

It sounds like you're over boosting and the engine protection is cutting in - theres a pressure switch on the back of the intake manifold that get's activated. Have you fitted a bleed valve or been adjusting the waste gate actuator arm since getting the car?

If it's you adjusting the boost rather than a genuine wastegate issue, you can adjust the over boost switch by screwing the screw clockwise

well it starts to judder then it like cutts out then once u let off the accelarator it goes ok if u drive it sensible its ok but wen u open her up it just judders and jumps all over the place ????????

Re: my turbo is playing up help

all i have done whilst driving the car is twisted the boost control inside the car that all and now it only runs ok wid no boost can u giv me some things to try to get this car goin ok again thanks

ryt back please boys

You have a boost controller, i.e. bleed valve?

How high is the boost supposed to run on a GT?

i havent got a clue m8 i just no thats what its doing can u help

Has the GT got a boost gauge - what does the needle go up to if it has?

I'm just guessing a bit here, but if you're winding the boost up on a standard ecu, you'll get to a point where the ecu says 'Oi oi, that's too high, don't like this' and it effectively shuts down to protect the engine. This is what's referred to above.

When you say it's now running no boost I guess you mean standard boost (7 psi I think).

I used to own the 1.4 Uno turbo and adjusted this to run at 1 bar (14psi) peak by adjusting the wastegate actuator. I also had to adjust the over boost switch to allow the extra pressure without engine protection cutting in. From memory the switch is on the left of the intake manifold and you can get a fine screw driver into it to load up the spring inside.

What you need to remember is that FIAT have set the overboost sensor at it's current level to protect the engine. If you start winding up the boost without adjusting the fueling (through a map or rail pressure) the engine will run lean and eat itself. Other considerations such as lowering the compression ratio and an uprated charge air cooler need to be taken too.

My advise is if you don't know the history of the engine or what winding up the boost actually means, leave it alone or get a specialist to sort it for you. When I raised the boost on my Uno, a friend with an R5 Turbo did a similar mod to his so that it would keep up on track days. He then went through two head gaskets, a charge air cooler and finally melted two pistons. btw I work for a company that designs and manufactures turbo charged engines

Not being nasty Punto GT boy, but can you please stop posting this in every section? I can't keep up merging and deleting it all!

ok thankyou so u think it could b several things what is the first thing you would try ???

Try running at no more than 7psi boost, first.

sorry just wanna get this problem sorted its pi***ng me off so can anyone help and giv me the first thing to try bearing in mind im an 18 yr old boy thanks max !!!!

and how do i no wot its running at m8

For now turn the boost controller right back (off) so that it's running standard boost. Get in touch with the previous owner and find out what (if anything) else has been done to the engine and post it back here.

I'm away for a few days so please be patient with the responses.