Originally Posted by Zach
Hi Richard

Thanks for your reply very interesting. One other thing I forgot to mention which that my be useful but may be a complete red herring.

I am pretty sure but can't be certain that the Ford fusion with the DBW was not fitted with an idle speed control valve. If I understand the function of this valve correctly it bypasses the throttle plate at idle so that the PCM can effectively open the throttle. This takes account of the the increased load that can be applied to an idling engine with lights, heater fan, powder steering etc. So if there is no ISCV then I am guessing that that function is taken care of by the fact that the PCM sits between the pedal and the throttle plate and can choose to modify what the pedal position is calling for. My Morgan has the old fashion mechanical throttle cable but has a PCM, so has a ISCV valve fitted.

Regards Tony

Thanks again for reply Tony. Yes no ISCV on my car or any other with DBW operated throttle for the reasons you mention.

For the record I don't have the infamous and now hopefully historic throttle hang issue suffered by many earlier 3.7 Roadster owners. The effects of this were very accurately described to me by an owner who's car was written off when it happened, thankfully with no harm to himself.

Richard

2018 Roadster 3.7
1966 Land Rover S2a 88
2024 Royal Enfield Guerrilla 450
1945 Guzzi Airone