Technical Mk 1 fiat punto selecta - stepper motor/Idle setting faulty.

[inceys]

Hi, my fiat punto is hunting like mad, when I get to traffic lights or a junction etc the car stalls. Would this have something to do with the stepper motor? The idle setting is obviously faulty as the speedometer needle keeps jerking up and down.

Any thoughts would be great.

 

[Most Easterly Pandas]

Idle setting has nothing to do with speedo cable.

This a mk1 Punto I assume. Do you know if the speedo's are electronic or cable driven?

Jon.

 

[arc]

stalling like that i'd be looking at MAP sensor, but first try removing the idle stepper, cleaning it and it's tubes through the TB with carb cleaner. Turn the ignition on with the stepper disconnected. Leave for 30seconds. Turn off, reconnect stepper. Turn on for 30 seconds. Start car.

 

[inceys]

It's the rev counter that keeps jerking - Then stalls when I stop.

I shall try the cleaning idea though, thanks.

 

[Most Easterly Pandas]

Have Punto Selecta's powdered clutches

 

[arc]

rev counter jerking.. hmm..

it well be a clutch issue instead i guess, and then that is what is stalling the engine. i dont know the selecta clutch at all tho

 

[Most Easterly Pandas]

rev counter jerking.. hmm..

it well be a clutch issue instead i guess, and then that is what is stalling the engine. i dont know the selecta clutch at all tho

If anything like Panda Selecta it's a electronic powdered clutch. This is operated by micro switches (two) on the acceleator pedal.

I'd check those as it sounds like the cluth isn't disenguaging, possibly as a result of a faulty mirco switch/connector.

How long have you had the car? Before this problem did your Punto 'creep' like conventional auto's or not

Jon.

 

[inceys]

its automatic transmission

 

[inceys]

Not creeping, no. It doesn't always stall - but when it does, it's a nightmare.

 

[Most Easterly Pandas]

Yep sounds like miro switch on the accelerator pedal not disenguaging the clutch.

Have a look to see there isn't any grime building up/floor matt catching it

Jon.