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I do think the alternate sensor will help since it doesn't use the engine case ground for the ground. On the possibility the alternator is leaking voltage around the positive terminal, gonna clean it also. Stranger things have happened!

It's an RV7 (metal airplane) Panel is aluminum Did not check the Dynon ground, however the unit is perceiving the circuit is less resistive by getting addtional voltages into the sensor. The ground the techs are talking about is the engine ground in which alternator voltages is getting into the...

Based on tech support from Dynon in other posts, ground is the reason so I decided to tackle it from that aspect. Pulled the ground from the engine to the airframe (connection is same post that the battery ground strap hooks to).  Cleaned both ends with 400 grit sandpaper and also cleaned the...

I just replaced the cowl and added a plenum but did not do any instrumentative work and now my oil temp has gone nuts.  I decided to replace the sensor because it always bounced around a few degrees.  Also, replaced the fuel pressure sensor because it's been bouning between normal and 99 and it...