By PL Freeman May 2nd 2014 The verified purchase already had one and needed another for my twin car to properly set the airflow measurement. 3.0 of 5 stars Reviewed by the cry AugVerified Buy Easy to install for use - the test tube is surprisingly short. So I could put Gunson on a particular exhaustport and put CO up or down dash and see the result in about a minute. When turned on the needle only seems to stick to 2.5 on the scale as if it comes up to the stop instead of swinging at one point and then settling down. I would not really care about the exact number of boxes.
The extra CO2 higher than in normal combustion can cause the Gunson unit to calculate 0.0 CO. 5.0 out of 5 stars Read the instructions and it will be good By David English JVerified Buy As people have said it a bit fragile but it does what it supposed to do. Did you do that when you said you melted O2 or would you go out of diagnostic mode and physically squeeze the tube for the last measurements Please try again later.
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