UK Lee Posted March 15, 2021 Report Share Posted March 15, 2021 Hi Guys , can i pick your brains please ? . I'm building a YB powered Mk1 Escort with a Link Monsoon ECU and am at the wiring stage. I'm using the throttle body & inlet from a later EECIV Small Turbo Escort YB and the EECIV ISCV has a really weird plug on it . I'm trying to make the engine harness and cant find a female plug to suit the connector on this particular idle valve. These idle valves are also particularly hard to source and as soon as you mention 'RS Cosworth' the prices rise dramatically I guess I could stick with the OEM idle valve and then solder a couple of wires to the terminals at one end at 'pot' the connector and then use a more common male / female plug to join it to my wiring loom - but there may be an alternative ! I've found an ISCV from a Mk6 Fiesta which 'physically' will bolt straight onto the throttle body (same gasket and hole spacing) and as an extra bonus - it uses the common EV1 / Junior power timer connector like my injectors and sensors . These valves are easily available and much cheaper than the cosworth one. Can i bolt it on & hook it up without any problems with my Link ECU ? In my (simple) mind Its just a 2 wire solenoid that operates a sprung piston valve to allow air to bypass from one port to the other isn't it ? Or is the idle valve an electronic control side of it - a bit cleverer than that ?, and i need to be wary of coil resistances or other internal differences between them ? Help ! Quote Link to comment Share on other sites More sharing options...
essb00 Posted March 15, 2021 Report Share Posted March 15, 2021 Yes, you can use that. There's really nothing electronic inside of it. Just a solenoid coil - which is ECU controlled by pulse width modulation. UK Lee 1 Quote Link to comment Share on other sites More sharing options...
koracing Posted March 16, 2021 Report Share Posted March 16, 2021 I agree with @essb00: that's a basic PWM inductive (and therefore non-polar) solenoid and should work just fine. Power to one pin, second pin to ECU ISC output (I usually use Aux Output 1 or 2). UK Lee 1 Quote Link to comment Share on other sites More sharing options...
Adamw Posted March 16, 2021 Report Share Posted March 16, 2021 Just first check the resistance of the solenoid. 99% of the ford ones are fine, but there is an odd UK one (from the CHV or CVH? engine) that is really low resistance and wont work. The aux outputs can handle 2A max so it needs to be more than about 7ohms. Also, be aware most of the ford ones are vacuum assisted, so they need to be oriented so that the manifold vacuum is on the correct port. They dont work backwards. You need to look at pictures of the original application engine to figure this out as some that even look similar are oriented visually reversed compared to others. koracing and UK Lee 1 1 Quote Link to comment Share on other sites More sharing options...
UK Lee Posted March 16, 2021 Author Report Share Posted March 16, 2021 great , thanks guys Quote Link to comment Share on other sites More sharing options...
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