Electric Accusump Valve Reboots Digidash 2!!
Discussion
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?
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?
MikeE said:
Any tips on what would I be looking for if I try and track it down in the mass of wiring?
If you mean what does it look like, it'll be an electronic component with two terminals connected across the circuit that operates the solenoid. It ought to be pretty obvious if you can locate both ends of the wires that power the solenoid. Given how easy it is to do, it would be reasonable to simply add a diode and see whether that fixes the problem. If it does, either there wasn't already a diode, or it wasn't connected properly, or it has failed. Just make sure that when you add your diode, you get the polarity right; it should block current when you apply power to operate the solenoid.Gassing Station | Engines & Drivetrain | Top of Page | What's New | My Stuff