My Frequency valve was not working so i tested the valve using an ohm meter and found the reading was 2ohms which is correct according to the technical manual. I connected 1 terminal of the FV to +12v and the quickly touched the engine with the other and the FV clicked. I checked both the FV and the ECU were getting +12v from the Lambda relay and the ECU was grounded correctly. This was all OK so i checked the ECU out of circuit and found it was dead. Steve Wynne told me they never fail and he has only sold 3 or 4. A friend of mind had a look at the ECU as he is an electronics engineer and found the IC had blown so 50 cents later it was all fixed!! [Non-text portions of this message have been removed]