This kind of problem is now with the Punto. RPM is limited to 2500 rounds. Mil lights up every time you give enough gas, but not in memory FiatMultiEcuScan found nothing. Car driven 130 000 km.

T.e done so far:
-plugs and ignition wires replaced, no effect
-checking out the exhaust pipe from start to finish, not blocked
-sensors values ​​checked tester-> ok
-ECU changed about 20tkm ago
-connectors and components checked
-pressures on gasoline-> ok
-pressings measured
-manifold has not yet been removed, but the mirror trying to look for possible cracks

The plugs must swim really fast after the exchange might be related in some way to this problem ...

A lot of these problems Puntos written about, but I certainly would not have found this a suitable case. If one of the forum have experience or good tips, so any advice will be well received!

ECU problem??

Hi,
8 Valve or 16Valve..?? 1242cc..??

have oyu removed hte spark plugs and check their colours,
a difference may point to a weak / RICH fuel mixture ( on 1 cylinder)

the MIL is probably indicating unburnt fuel.. BUT strange it is not storing a code..,
Charlie

hmmmm
By fact you say plugs - your not a diesel - your the
petrol
1.2 8v
1.2 16v
1.8 16v (HGT)

My advice - check the timing, make sure your not a tooth out for example
Also - the engine will run without most sensors - as it goes on a base program
Disconnect one and see if the car improves its revving ability, it'll help point to whats at fault - but you will need to keep clearing the codes generated

My feeling is the MAP sensor on the inlet,
But other things to consider
8v - is the throttle body opening up fully when throttle is applied
1.2 + 1.8 16v, they use the fly-by-wire throttle, does it again open the throttle fully when the accelerator is stamped on?

Ziggy

Ziggy122 said:

hmmmm
By fact you say plugs - your not a diesel - your the
petrol
1.2 8v
1.2 16v
1.8 16v (HGT)


My feeling is the MAP sensor on the inlet,
But other things to consider
8v - is the throttle body opening up fully when throttle is applied
1.2 + 1.8 16v, they use the fly-by-wire throttle, does it again open the throttle fully when the accelerator is stamped on?

Ziggy

Click to expand...

header says '02 1.2

limited throttle movement would'nt put on MIL..??

let them reply.. for more info

Charlie

varesecrazy said:

header says '02 1.2

limited throttle movement would'nt put on MIL..??

let them reply.. for more info

Charlie

Click to expand...

If you press 100% throttle on pedal it will say to throttle body - 100% please
But the motor only moves it 40%, the 2nd checker will say yes thats also 40% = EML on

But we do need more info from OP
Little surprised no codes been generated tho?

Ziggy

Sorry guys, we checked timing belt again and it was jumping two teeth. But thanks everybody on tips!

jmaki said:

Sorry guys, we checked timing belt again and it was jumping two teeth. But thanks everybody on tips!

Click to expand...

8 valve motor then..,

glad you fixed it,
Charlie

i would have said phase sensor out
still worth doing before it phases out at 71mph in englandar

so my first thought been timing was correct - SCORE!

Ziggy

Ziggy122 said:

so my first thought been timing was correct - SCORE!

Ziggy

Click to expand...

yes but we have a cadaver because you had many stabs

s and b said:

yes but we have a cadaver because you had many stabs

Click to expand...

im one of those people who can point to possible causes off top of my head

but i cant force think to an actual answer - i leave it to ponder in my head

And before i know it - i usually can come to some sort of a decent diagnosis

Ziggy