MSgpio.com read only forums (Jan.15,2018)

Thanks for all of your help thus far Lance, I may do the noise filter or maybe borrow a battery and isolate the power and ground to see what changes. Also I may use the battery and alternator tester from work to double check my alternator's output as far as its internal diodes and such. I will post soon. Thanks again!

Found a post about electrical noises. Person said to use an am radio to see if there are whacky noises, soooooo I sat in car with am on no station just static with key off radio on sounded normal. Key on OMG! What a crazy noise headlights on(HID) even worse!!! So I ordered a noise filter (now the agony of waiting begins) and will try to triple check engine and body grounds and report back maybe isolate with separate battery too

So I think I got it! If I am not mistaken the build guide for the 4L80E does not show ANY build guide for the GPI5 and VR2 which happen to be upshift and downshift so you can bet I didn't have those circuits built!!!!! Someone must double check the build guide to direct others to check the 4l60E build guide for those circuits. So far with a quick test and kickin' the car in it's butt it seems to be good, have to drive more. But in the meantime I did put a big fat ground cleaned the others and put a filter in the 12v feed which can only help. And yes 2:30 in the morning eureka! When I realize what circuits were missing.

gnx412,

The 4L80e guide was produced and kindly donated by by Dave Hjort. I think Dave must not have used the shift buttons in his installation, so he didn't document this. I will add those build subsections very shortly. Many thanks to you for spotting this omission!

Lance.

So I am back to fine tuning and it seems good. This Megasquirt stuff is quite awesome for the real car guys who build and have real bragging rights I'm actually glad this happened so some good came of it. I do insist if anyone has a fwd build like this I would love to help!