hi jhawk
I've copied the details from the LVV Standard (
www.lvvta.org.nz/documents/standards/LVVTA_STD_Exhaust_Gas_Emissions.pdf ) which detail the 'required equipment' on a fuel injected engine;
2.4 Electronic fuel injection system equipment
Required equipment
2.4(1) A low volume vehicle that is fitted with an engine which incorporates an electronic fuel injection system, and maintains the engine manufacturer’s fuel injection system and computer, must, in order to run efficiently and emit the least possible amount of harmful exhaust gas emissions, continue to be fitted with any of the following items that were originally fitted to the engine by the
original vehicle manufacturer:
(a) an air‐flow sensor or MAF sensor; and
(b) a temperature sensor; and
(c) a detonation (knock) sensor; and
(d) a throttle position sensor; and
(e) one or more oxygen sensors; and
(f) an idle control valve; and
(g) a computer fault code warning light, or malfunction indicator light (MIL).
The standard continues with;
Removal of required original equipment
2.4(3) A low volume vehicle that, as a result of the installation of an aftermarket fuel injection system or an aftermarket programmable electronic control unit, has had any of the engine manufacturer’s components specified in 2.4(1) removed, must be provided with alternative equipment capable of achieving satisfactory air quality emissions over a range of operating loads and inlet air temperatures.
The note-box below this section clarifies;
NOTE: In some cases, during the installation of an aftermarket ECU, the OE air‐flow sensor may have been discarded. The requirement specified in 2.4(3) may be complied with by the successful application of the air‐fuel ratio testing specified in this standard.
This air-fuel ratio testing is carried out by our LVV Certifiers at the time of the LVV Certification inspection.
I hope this helps
Justin
