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> While this MIGHT be useful for someone with LOTS of experience on lots of cars, > I don't think it would help the average person. There are 2 problems: it > depends on how warm the engine and the air around it are, and it depends on > having a lot of experience so that you have something to compare it to. > I guess our UK air temps don't vary as much as somewhere like Wisconsin with a continental climate, but we're talking of the exhaust gas from an idling engine, and not very far from the source of heat for our rear engine cars. The lean mixture was uncomfortable very quickly. I was surprised to have to agree with the guy. Since FI cars can't be adjusted, it's probably unlikely to be useful to you, Jim, but how about pulling off the pressure sensor hose and see if you can feel a difference. As it's very rich then, it should be easy to notice any difference in temperature if there's anything in this as a tuning help. Just think, a guy appears with the car not running well, and you feel the exhaust and announce that his pressure sensor is duff, or it's hose is damaged! ;-) It's not a replacement for a CO meter though! Dave. UK VW Type 3 & 4 Club http://www.hallvw.clara.co.uk/ ------ ------------------------------------------------ To unsubscribe, E-mail to: <type3-off@vwtype3.org> For more help, see http://vwtype3.org/list/