Having problems with your 2005 Fiat Pininfarina ?

My 52 plate Stilo 1.9 JTD has an ongoing fault of engine backing off at high speed (but maintains this speed if you accelerate away) and cutting out altogether when slowing down to idle for a junction for example. I've changed the fuel filter and checked ecu/sensor connections but all seems ok. I get no fault up on the dash when the fault is evident. Also the last time the fault occurred was about 8 months ago. There is plenty of fuel pressure to and from the filter housing so i'm guessing the l

Posted / edited by AnonymousUser on : 20-11-2017

Answers :

I would suspect a system that is only supposed to work in mid range.
I don't know the European pollution laws, but in the US, the ERG or purge valves can cause this sort of symptom.
Both are essentially small intake manifold leaks, that mess up the mixture to some degree.
The EGR (exhaust gas recirculation) is just terrible in that the exhaust deposits clog the valve and cause it to bind open, while also harming the valves as well as performance and mileage. I would remove an EGR system UNLESS the engine is so high of compression, that it requires exhaust to poison the mixture, in order to prevent pre-detonation from compression, with low octane gasoline.
The purge valve is to vent the gas tank, to prevent both vaccum or excess pressure releasing gas fumes to the atmosphere.
Repair Help & Product Troubleshooting for 2005 Fiat Pininfarina

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