G4 Evo 9 plugin water sprayer issue

[Dynotech NZ]

Hi guys, I have just installed the G4 plugin to my evo 8/9 3 plug ecu I have DI 2 as intercooler autoswitch and injector drive 7 is intercooler spray relay as per factory set up I am having an issue with the intercooler sprayer, but the auto button doesn’t activate the sprayer relay now or light the i/c light on dash. The manual button still works as per normal. I am using the Auto spray switch as a GP input at the moment to activate logging or antilag or launch. This works fine! So it must be to do with the injector drive? Works fine on std ecu. I even tried setting the i/c spray to trigger on throttle and not the switch and it doesnt activate Any ideas Thanks Phil

[Dynotech NZ]

Sorted The waterline non return valve was seized closed and the car must be running as the i/c spray is on an injector output

Previously phil wrote:

Hi guys, I have just installed the G4 plugin to my evo 8/9 3 plug ecu I have DI 2 as intercooler autoswitch and injector drive 7 is intercooler spray relay as per factory set up I am having an issue with the intercooler sprayer, but the auto button doesn’t activate the sprayer relay now or light the i/c light on dash. The manual button still works as per normal. I am using the Auto spray switch as a GP input at the moment to activate logging or antilag or launch. This works fine! So it must be to do with the injector drive? Works fine on std ecu. I even tried setting the i/c spray to trigger on throttle and not the switch and it doesnt activate Any ideas Thanks Phil

[Cameron Moore]

Hi Phil,

Good to know you found the issue.

Injector drives will work as Auxiliaries with the car not running (they are sometimes used to run fuel pumps/engine fans). But as the ECU just provides a ground it may be that power is not supplied to the relay by the factory circuitry unless the car is running.

-Cameron