Failed Emissions

IHateHacks · 05-18-2007, 01:33 AM

Where is the CO (carbon monoxide) reading? You have HC and 2 NO readings.

What is this 25/25 and 50/15?

I can tell you one thing though, you are going to have to pull the EGR valve off and clean out the passages in the EGR valve AND the intake manifold AND the cylinder head, not an easy job with the head still bolted to the block. Trust me, your EGR valve is definately coated in carbon with NOx readings that high.

Have you replaced the spark plugs and wires yet? Air filter? Fuel filter? Have you checked ignition timing? All of these play a vital role in emissions output. Any stored codes? You should check the ECT sensor with an ohm meter. Replacing the O2 sensor won't hurt either.

Aren't you the one with the 200k mile supra? Good luck getting that thing to pass without an overhaul.

05-18-2007, 01:33 AM	#2
IHateHacks 20psi boost Join Date: May 2006 Location: New Haven/Hamden Posts: 793	Where is the CO (carbon monoxide) reading? You have HC and 2 NO readings. What is this 25/25 and 50/15? I can tell you one thing though, you are going to have to pull the EGR valve off and clean out the passages in the EGR valve AND the intake manifold AND the cylinder head, not an easy job with the head still bolted to the block. Trust me, your EGR valve is definately coated in carbon with NOx readings that high. Have you replaced the spark plugs and wires yet? Air filter? Fuel filter? Have you checked ignition timing? All of these play a vital role in emissions output. Any stored codes? You should check the ECT sensor with an ohm meter. Replacing the O2 sensor won't hurt either. Aren't you the one with the 200k mile supra? Good luck getting that thing to pass without an overhaul. Last edited by IHateHacks; 05-18-2007 at 01:35 AM.