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The University in NC does emissions testing with a gas analyser and obd2 logging rigged up in vehicles for portable use. I assume they are running the gas analyser on an inverter. They use a separate battery to run the equipment so that it is not loading the system other than the extra weight. I am also looking for a cheap gas analyser, preferably 5-gas to emulate their setup. Texas inspection stations still use 4-gas units, leaving out NOx. I bought a DashDyno for obd2 logging, though I haven't gotten it to log anything to the sd card.
It's surprising to see anyone else interested in emissions testing who isn't directly involved in the industry. I created a gas additive and want to get a handle on what's going on with it before spending the $27k for FTP-75 Stage 1 testing. I was very put off by the attitude of the engineer I talked to at one of the EPA approved facilities in TX, as he was bragging about the test only taking 11 minutes. You have to do 3 before and 3 after tests on 2 vehicles for stage 1, minimum. 2 hours and 12 minutes for $27k... am I in the wrong business?!!!
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