Hello guys,

I have the following problem. As I run megasquirt on my CVH I had to fix the rev counter input. I did it according to the scheme of topic "What do I need to convert my MFi RS Turbo to run EFi? Updated 05/04/14 "



My lay out is following. The -VE coil 1 and 2 are connected to the megasquirt and as well to the diodes as above. The wire that says to tach goes to the green wire on the blue connector of the dials and to the middle pin of the fuel relais.

What happens now is that with the blue connector on the dials I get 5 volt, with running engine, on the +15 (12V with key on, 0V with key off) when the key is out! If I take the blue connector of it drops to zero.

Also it makes the car run bad, so clearly something goes wrong.

I also followed the scheme on this one, but don't know what kind of input the tach wants to see.

Any thoughts on this? Is my explanation clear?