Quote:
Originally Posted by twobjshelbys
I think you may be missing part of the recipe. This is a crate engine... The OP doesn't state the origin of the engine and if it is Australian federalized. The O2 sensors on this engine might deviate from a stock 4.6 in either AU or the US.
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I don't think so Tony.
From an operational sensor point of view, the origin of the engine is perhaps not as important as the EFI system. The OP has already indicated the EFI is OEM Ford. That obviously means Ford calibrated it for one of their over the counter narrow band O2 sensors. Because the EFI has already been calibrated for a particular O2 sensor by Ford fuel system calibration engineering, it will require that sensor to operate correctly in closed loop..
The shortest way home for the OP is to go to Ford and get the sensor they calibrated their EFI system for. He maintains that is not possible. I tend to doubt that. But, let's give him the benefit of the doubt and say, for whatever reason, that sensor is not available in Australia!??
If that is the case the bottom line is the EFI system he has will never operate in closed loop without that sensor. He has two alternatives available to him:
Alternative 1:
Plug the O2 sensor ports and operate the ECU in open loop. While certainly possible you loose all the benefits of a closed loop system using oxygen sensing to adjust mixtures on the fly. Additionally there is an excellent chance the Regulatory Authorities in Australia will not license nor pass the car for operation on Australian roads in this condition.
Alternative 2:
Deep six the OEM ECU and buy an aftermarket ECU where he can specify and install any O2 sensor his heart desires. You will be back to all the good old fashioned fueling control possible with an O2 sensor
but, and this is a big but, again the car will very likely still not be possible to register for use in a daily driving fashion on Australian roads.
An additional concern for our erstwhile enthusiast is the crate motor even with good O2 sensors
if not submitted by Ford for compliance with Australian clean air standards again will not be licensable for operation on Australian roads.
If the usage is off road, then new vistas open up for our OP. Literally any aftermarket ECU can be used. All he needs to do is decide which one he likes and pay for it. I suspect the off road usage however is not how he intends to use this vehicle so, while possible, this does not really solve his problem.
The OP needs to come to grips with reality and make decisions that will jive with Australian regulatory compliance and stop looking for ways around the system. Life will get easier.
A possibility I did not speak to is that he bought a crate engine in the US and is attempting to license a car in Australia with that engine installed. That particular path has an unhappy ending also.