I would use extreme caution with lean mixtures. Burnt valves, pistons, etc. can easily happen fairly quickly. Having said that, some piston aircraft engines are run at cruise power, with the fuel/air mixture on the lean side of mixture/temperature curve. With insufficient fuel to generate the higher temps, temperature is not an issue, but remember the aircraft engine may run for hours at a constant power setting and one can tweak the mixture for best economy at that power setting. Change power setting, altitude, and everything changes, generally the mixture is richened to a cool burning mixture on the rich side of the curve until a steady cruise power setting can be maintained. To do this one needs exhaust gas temperature probes on all cylinders and an electronic monitor that displays all temperatures graphically and alarms. There is considerable info on the topic, mainly under the subject of "EGT" (Exhaust gas temperature). microsoftwarecontrol wrote: > found it: > http://rockledge.home.comcast.net/~rockledge/RangerPictureGallery/DPFE-Voltage-Test.html > for you guy information. > > If your car start feeling hesitating, jumping, pulling, EGR system is where > to check and DPFE sensor is first thing to go. > > DPFE is just a differential pressure sensor, with V+, GND, 0-5V output! > nothing else inside! It is flow speed meter by throttling. Selling at $130, > by car people. is MCU people can make a difference? > > I think it is possilbe to using a lower range pressure sensor, to bring > higher burning temperature for higher > gasmilage and more power. And only if higher buring temperature gets such > benifits. > > > > ----- Original Message ----- > From: "microsoftwarecontrol" > To: "Microcontroller discussion list - Public." > Sent: Saturday, November 01, 2008 2:25 PM > Subject: [OT] car EGR DPFE sensor, an alternative. > > > >> It is common, for dead DPFE sensor brings you tons bad feeling. >> One such small plastic case, is sold at $130. >> >> What is included? Just a two ports differential pressure sensor. >> >> Any one tried to buy a sensor to replace dead car sensor? >> What is its specification? Who is possible pressure sensor supplier? >> >> >> >> >> __________________________________________________ >> Do You Yahoo!? >> Tired of spam? Yahoo! Mail has the best spam protection around >> http://mail.yahoo.com >> -- >> http://www.piclist.com PIC/SX FAQ & list archive >> View/change your membership options at >> http://mailman.mit.edu/mailman/listinfo/piclist >> > > __________________________________________________ > Do You Yahoo!? > Tired of spam? Yahoo! Mail has the best spam protection around > http://mail.yahoo.com > -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist