i have a 94 plate punto gt and within last week i had a problem when i accelarated blew a boost pipe off we fixed then happened again otherday put blew turbocharger pipe off when u accelerate it goes so far and its either a blowing noise or banging or it pulls you back and backfires need help asap thanx

start with giving all your boost hoses a check over for splits and leaks.

second give your afm a clean.

is the injector light on??

Just a thought -- has the timing slipped?

hose light is on and abs had all hoses off today and we've disconnected boost control and put it bak on standard fiat thing

so you have put the standard piersberg valve back on?

what is the spec/mod on the car?

try and do a blink test which should bring a fault code up.

all i know is its 1.4 turbo mate had a bit done to it all the words i see under bonnet is bosch when u get to bwt 3500 rpm it splutters and pulls back sometimes back fires ive bought new plugs gunna get some magnecor leads now looking at the 315cc weber injectors

lampy think i have found problem well what it feels like is that there isnt enough pressure for the fuel getting pushed through ive gt a split on the seal in my tank and no fuel cap cos the nobs round my area pinched it also theres a noise i can hear like a loud whining noise coming from near fuel tank any ideas ?

the whining will be your fuel pump, are you leaking fuel?
take the plate off under the rear seat and check the fuel pump housing as the nipples where the fuel lines connect are renowned for breaking leaking but definitely fit a new fuel cap.

have you managed to do a blink test yet?
heres a link of how to do it and a list of coeds.

http://www.puntosports.co.uk/forums/showthread.php?31927-Blink-Test-Codes

For God's sake man -- take it somewhere where they know what they're doing.

The issues you refer to won't affect fuel pressure.

Did you check the timing?

lampy is right, first step really on a GT is nearly always a blink test, all you need is a piece of wire so get it done..

ive changed the battery on it so i dont think the blink test will work but my mate told me to disconnect thu battery over night re attach it then do blink test

depends what code it is whether it will be stored or not after pulling battery off. But if you don't get any codes then try driving it, as soon as the the EM light comes on it will have logged something

whats an em light im new t thu punto gt well a used t have a gt3 but i could run that into ground and all i changed was brakes and rocker cover gasket

the engine management light

Its all new to me as well really tbh, i got a gt3 myself but not done many miles or much work on it since getting it really. But from reading many many posts about them blink test is defo where to start in general.

kk bud any bit of wire-copper

any piece of wire will do yeah, talking tiny currents here so whatever you have to hand.. speaker wire maybe??

kk i read up on blink test i took cover off it is thu bit next to were the abs box is isnt it ?

the link lampy posted has instructions and pictures to guide you

any bit of wire will do fella.

sort of relevant i'm sure i read/heard somewhere that gt1's only read out one fault code at a time where as later models will real off multiple fault coeds in one go. basically you have to fix the first coed until the next one will come up that is if you have multiple faults on a gt1???

haven't tested this theory as i'v only ever had one fault at a time in the last 8 years of owning my gt1's

sorry if i'm starting to confuse you lol just wondered if it's true or a load of crap

as i understand it, it repeats the code until you break the connection and next time you touch the wire it moves onto the next code.. I not had a reason to do it yet myself so i couldn't say.

Just try it and see..