Hiya guys-n-gals.
Joined up to see if i could get some info with a hugely annoying problem. Should have done so earlier....as we have 2 Punto's in the house; and being a Petrol-head - i'm always up for some car related chat / banter....
So my sons 2008 1.2 Punto 'Dub' recently started randomly stalling. It 200% worse when hot. And if pulling up to a junction for example and depressing the clutch - will stall 50% of the time. And 100% if / when you press the brake pedal irrespective of anything else ! Will do this even stationary.
Car went into my normal garage of 30 years and a crank / RPM sensor fault was showing - so was replaced with new. No better - so they suggested a cam sensor. Genuine Magneti Marrelli item fitted. No better. Garage then says they've had enough........:bang: [Which annoyed me hugely as all work was paid for; but they pretty much just 'gave up' as this point]
Next garage thinks its fuel pump and is sure he can hear it cutting out. Takes it out, cleans it etc - refits as can't get a new unit in the same day - then decides it's not the pump after all. Tries everything they can think off - but when car is warm - even when sitting stationary - just pressing / pumping the brake pedal a few time and off the car goes. Needle just drops below 1k, carries on sweeping down until it stalls.
They then played around with the brake servo / vacuum hoses, disconnected the MAP sensor, tried a brand new MAP sensor all to no avail.
When car is cold it drives, starts and sounds faultless. Even so when warm until you nearly come to a halt. At this point we're all scratching our heads.
Their suggestion is possible internal brake servo fault causing vacuum issues.
Possible throttle body issue.
Maybe even an ECU fault.
But the car has and throws out no ECU fault codes so really unsure where to even begin ??
Suggestions welcome as my newly driving sons confidence is getting low !
Cheers all.
Joined up to see if i could get some info with a hugely annoying problem. Should have done so earlier....as we have 2 Punto's in the house; and being a Petrol-head - i'm always up for some car related chat / banter....
So my sons 2008 1.2 Punto 'Dub' recently started randomly stalling. It 200% worse when hot. And if pulling up to a junction for example and depressing the clutch - will stall 50% of the time. And 100% if / when you press the brake pedal irrespective of anything else ! Will do this even stationary.
Car went into my normal garage of 30 years and a crank / RPM sensor fault was showing - so was replaced with new. No better - so they suggested a cam sensor. Genuine Magneti Marrelli item fitted. No better. Garage then says they've had enough........:bang: [Which annoyed me hugely as all work was paid for; but they pretty much just 'gave up' as this point]
Next garage thinks its fuel pump and is sure he can hear it cutting out. Takes it out, cleans it etc - refits as can't get a new unit in the same day - then decides it's not the pump after all. Tries everything they can think off - but when car is warm - even when sitting stationary - just pressing / pumping the brake pedal a few time and off the car goes. Needle just drops below 1k, carries on sweeping down until it stalls.
They then played around with the brake servo / vacuum hoses, disconnected the MAP sensor, tried a brand new MAP sensor all to no avail.
When car is cold it drives, starts and sounds faultless. Even so when warm until you nearly come to a halt. At this point we're all scratching our heads.
Their suggestion is possible internal brake servo fault causing vacuum issues.
Possible throttle body issue.
Maybe even an ECU fault.
But the car has and throws out no ECU fault codes so really unsure where to even begin ??
Suggestions welcome as my newly driving sons confidence is getting low !
Cheers all.
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