Ford Sierra/Escort Cosworth IAW045 and IAW048 ECU's
Intercooler Spray System (ISS) on the Ford Escort Cosworth.
The IAW048.P8 will require a reprogrammed EPROM to activate the water injection system.
The ISS injects water directly into the air stream at the exit of the intercooler.
To keep the water from being pushed back the water container the system is equipped with a flow valve (one way valve). This ensures that if the pumps are switched off when the turbocharger is making pressure, the system doesn't leak air from the air stream to the water container.
The use of two pumps in series is necessary to overcome the boost pressure at the injector, otherwise no water would be sprayed.