My punto was running lumpy and white smoke was coming out the exhaust and cut out with no throttle so i changed the ecu + coil pack + plugs. It now still runs lumpy but it doesn't cut out + no white smoke. What else can I do? It doesnt run right. sounds like a subaru but really struggles to drive

Hi,
if youve tried the Basics'

Eg. spark plug's/ht leads..coils..and the ecu change'.

then id be looking into ..is the headgasket on its way out.

do a compression test or even easier a vacuum test
my bet is probably a burnt out valve

Does the car hesitate?

I had a similair issue few days ago, air/fuel combustion wasn't right because my HT leads needed replaced, along with a good clean of my throttle body.

Just saying because you haven't mentioned anything about HT leads

I have changed the ht leads aswell still the same just runs really rough so i am going to try steel seal on it tomorrow saw a similar video on youtube with a punto so will try that

ive cleaned the throttle body but it stinks of petrol the only other thing i was thinking of was the labda sensor but other than that I have no idea.

puntomk2black said:

I have changed the ht leads aswell still the same just runs really rough so i am going to try steel seal on it tomorrow saw a similar video on youtube with a punto so will try that

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put as much as you can in if i was you

puntomk2black said:

ive cleaned the throttle body but it stinks of petrol...

Click to expand...

Breather pipe...?

puntomk2black said:

ive cleaned the throttle body but it stinks of petrol the only other thing i was thinking of was the labda sensor but other than that I have no idea.

Click to expand...

no warning lights on.?,
and not had to top-up coolant??

if not losing coolant - DON'T use any goo ( Kseal / radweld, etc),
you'll just clag-up the cooling system and almost GUARANTEE a HG failure


fuelly smell = at the exhaust.. or under bonnet..??,


Charlie

breather pipe I think is the fuel smell , The air filter is off.

no coolant is lost what could it be!??

Compression test, dry and wet. Rather than cluck around like a mother hen changing things, you need to do some diagnostics.

will a mobile mechanic be able to do this?

Yep. Or you can pick up a compression tester for about £15 posted on eBay. The Halfords ones are £25 but are nicer to use. It's a "tool for life".

That's the way I'd go -- advice on use here or plenty of stuff on You Tube.