before the swap everything worked, i mean im not too concerned because the car runs great, just tach doesnt work now and my check engine light is on, im just kinda curious if anyone else had a problem with the tach in the cluster doing a swap like this and how i should trouble shoot it

 

CEL codes?

The tach gets its rpm signal from the blue wire attached to the igniter unit.

 

7 and 41 so throttle pos sensor and oxygen sensor heater

 

I also undone my blue wire and hooked it up to my auto meter tach and that tach worked so I think it's from there to the cluster

 

I have a 96 with a d16y8 swap everything worked befor swap but now speedometer, and tach dont work and fan doesnt kick on and when i turn the key over without starting car fuel pump runs constantly please help thanks