Hi,
Our local emissions testing requires that all OBD-II vehicles be plugged into a computer, then started and idled for a few seconds to check for emissions issues.
Jim
I plan to install a 4BT with a ZF 5-42/BW1356 into a 1998 Durango. We have similar requirements in Louisiana. We are also required to have all original emissions equipment installed. I have given this some thought and have some ideas. I HAVE NOT TRIED THESE AND I DO NOT KNOW IF THEY WILL WORK! Here are my thoughts:
Coolant Temperature Sensor (CTS) - Install in the 4BT in place of the original.
Air Charge Temperature Sensor (ACTS) - Install upstream of turbo charger air inlet
Throttle Position Sensor (TPS) - Attach to injection pump linkage. Search the site - it's been done.
Manifold Absolute Pressure Sensor (MAP) - Try to wire in a resistor. If this doesn't work, wire it to the TPS. Use diodes in both the TPS & MAP to "electrically isolate" them. Wiring to the TPS should simulate engine load as the MAP does in the 4.7.
Crankshaft Position Sensor - Use a 6BT balancer; make a bracket to align the sensor to the balancer. You may have to machine additional "marks" on the 6BT balancer to match the Durango. This should also feed your factory tachometer. I believe Diesel Durango has this in the works.
Camshaft Position Sensor - Mount it facing the front of the 6BT balancer. Count the "firing marks" that the Durango sensor uses and divide by two. (Crankshaft makes two revolutions per one camshaft revolution). Machine the marks on to the 6BT balancer. It may be necessary to properly "time" the camshaft position sensor marks with the crankshaft position sensor marks to satisfy the computer.
Oxygen Sensors - Wire in resistors. If needed for visual inspection, Install sensors into exhaust piping, cut/ splice resistor(s) into wiring near computer.
Battery Temperature Sensor - Leave it in its present location.
Ambient Air Temperature Sensor - Leave it in its present location.
Oil Pressure Sensor - Install in the 4BT in place of the original.
Transmission Oil Pressure Sensor - Try wiring in a resistor. If this doesn't work, try installing into 4BT oil system. It will see varying pressure with engine RPM.
Exhaust Gas Recirculation (EGR) - I don't think the 2000 4.7 has an EGR. The 1998 5.9 does have an EGR. I plan to install it downstream of the turbine exhaust and plumb it upstream of the turbo compressor inlet. IT WILL BE BLANKED OFF AND WILL NOT RECIRCULATE EXHAUST TO THE INTAKE!
Fuel Injectors - Try leaving the wires disconnected. If this doesn't work, try wiring in resistors. The injectors are probably high impedance (12 - 16 ohms).
Catalytic Converter - Gut the converter, remove the inlet and outlet pipes by cutting the pipes on the converter side of the welds, slide a piece of exhaust tubing through the gutted converter and weld to the converter body. This should satisfy the "visual" inspection. Check the link for a better description.
http://www.lunghd.com/Tech_Articles/Exhaust/Copy_Cat.htm
If anyone has any ideas on this, I'd like to hear them.
Mike