My 1999 1.2 Punto revs when you apply the foot brake. This was a concern but only occurred occasionally. Today it was so severe that i had to switch off the engine when approaching a red traffic light to stop it revving ever higher.

A month ago my independent garage could not fix it as they could not reproduce the problem but now it has clearly got worse.

Any ideas? Thanks Martin

Take it to dealer who will put examiner on it,sounds like a throttle pot problem however check all basics,brake switch/carpet getting jammed,throttle cable not snagged etc

Hi by the way & welcome :wave:

Do you wear exceptionally wide shoes?

LOL....but hey true! used to happen whenever I drove my dads renault 5

I can't help but blip the Tipo when braking and coming down through the gears..























She can stall sometimes if I dont

Thanks for all suggstions - except the wide shoe ones.

Booked it in for diagnostics in 2 and half weeks, such is the local fiat dealer's waiting list.

Meanwhile my 18 year old daughter suggested braking like she does (i.e. before depressing the clutch) which seems to avoid the problem. Now I will not hear the end of it from her.

Thanks again, Martin

What was wrong with the wide shoes one?

What happens if you put it into neutral and coast? Does it rise in revs or is it ONLY when you apply the brakes?

July 2010. My problem is identical to that described by martin53.
My engine over revs when I brake. I have to switch off the engine to stop it. My Punto is V reg., engine 1242, 8v.

I took it to the Fiat Dealership, they couldn't reproduce the problem at first, but I took it in again and a technician drove it and it happened to him. They then suggested Throttle Potentiometer problem. Unfortunately a new one will cost over £500; I hope it solves the problem!

I know this may sound a bit odd but when you press on the brake pedal in a servo-assisted car, the inlet manifold vacuum is allowed act on the big diaphragm within the servo itself and matches your foot pressure x a given amount. But if the diaphragm is faulty, could that not let air into the inlet and allow the engine to rev its ******** off?

Just a thought

martin53 said:

Thanks for all suggstions - except the wide shoe ones.

Booked it in for diagnostics in 2 and half weeks, such is the local fiat dealer's waiting list.

Meanwhile my 18 year old daughter suggested braking like she does (i.e. before depressing the clutch) which seems to avoid the problem. Now I will not hear the end of it from her.

Thanks again, Martin

Click to expand...

I thought everybody braked first before depressing the clutch? Otherwise you lose the engine braking effect. I was always taught to only depress the clutch just before you come to a stop. But, back to the main point, I think maybe Shaun has a point about the servo issue. It sound a likely culprit.

Never declutch and brake. It reduces control, increases brake wear AND uses more petrol.

An engine ticking over (declutched or knocked out of gear) burns fuel. An engine with the accelerator closed runnin above tickover speed burns no fuel at all
nothing
nada
none!

The servo is a good point. Check the servo hose and check the servo for air leaks.

martin53 said:

Thanks for all suggstions - except the wide shoe ones.

Booked it in for diagnostics in 2 and half weeks, such is the local fiat dealer's waiting list.

Meanwhile my 18 year old daughter suggested braking like she does (i.e. before depressing the clutch) which seems to avoid the problem. Now I will not hear the end of it from her.

Thanks again, Martin

Click to expand...

i have the same problem ,
my best guess is its not the servio except its related ,
its the manifold purge inlet ,
you will notice a small tube coming out from the engine valve cover into the inlet manifold and the air filter ,
the inlets uses the gases coming out from the engine to stabilize the servio pressure .
if the hose is broken or not there - like my case - i think its the reason for the revving .
if that is not the case ,
so back to the main cause ,
the servio pressure valve ,or related .
:slayer::slayer::slayer: