I presume it’s the 1.4 16v?

If so my son has the same issue. He has asked on the Fiat Forums without receiving a coherent reply (all the replies he received have related to the 8v engine)

I suspect it could be the throttle body needs cleaning or a lazy sensor.

I will fit a new temperature sensor over Christmas and see if this helps and report back.

As always

Mark

Thanks Alan

I will be most interested to hear the outcome. My son has no fault lights showing not even when it cuts out so the £75 that the FIAT dealer suggested should be spent to "read the fault codes" was not as I doubt anything has been stored.

The induction system is quite easy to check for leaks and I have not been able to find one anywhere before where the trunking joins the block.

So that leads me to suspect the throttle body or a sensor. A other possibility is a "software update" but at the eyewatering prices the local FIAT garage charges I am reluctant unless it is most certainly that.

The temp sensor is only about £15 on shop4parts; the only other sensor they list for the 1.4 16v is a lambda sensor and there are 2 on this car which are about £55 each if needed but again from the symptoms I do not think the fault lies there.

Therefore the temp sensor seemed a good cheap place to start in the absence of a leak. The airfilter was changed as were the plugs 5 months ago so I doubt it lies there (the filter was nice and clean when I stripped the induction system).

No one on the Fiat forum seem to know the 16v at all they all waffle on about the 8v which is a completely different engine design and I suspect some of those that post there do not even own a car they just regurgitate posts by others. Other than that it could be a crank sensor but lets see what diagnosis you get tomorrow.

As always

Mark

Edited by mark on 14/12/2011 at 20:27

Alan

Thank you for that, I now feel good that looking for a leak in the first instance was a step in the right direction.

The location of the pipe in question would be handy to know as I would hope its the same pipe and is a design issue for this model that is causing the fault on my Son's car..

I eagerly await your next update.

Best regards

Alan

Thank you for kindly for supplying the additional information.

This will save a lot of time when my son brings the car over for me to have another look.

If it turns out to be something else I will report back.

Thanks again

As always

Mark