Electric Accusump Valve Reboots Digidash 2!!

[MikeE]

I've had a problem for a while where my Digidash 2 has been rebooting itself, I noticed it doing it very frequently at Brands Hatch a couple of weeks ago, particularly when cornering.

Today by chance I notice that switching the electric (solenoid) valve off on the Acusump is rebooting the dash, tried it a number of times and every time it did it. Now I'm guessing the solenoid/valve was switching off once I exited corners and oil pressure resumed hence the dash rebooting.

Can anyone give some advice on why the solenoid would cause a power surge when the switch is flicked off?

[MikeE]

GreenV8S said:

Should be possible to resolve by putting a suitably rated diode in reverse parallel with the solenoid to form a flyback circuit.

That's brilliant thank you.

The solenoid has been in the car for years controlling an accusump, the previous owner said the dash was working fine so I wonder if it didn't already have a reverse diode in it but maybe it's burnt out so no longer handling the restidual current when I switch off? Any tips on what would I be looking for if I try and track it down in the mass of wiring?