This may not be a swap problem but a simple electrical problem. My first post so please go easy if im in the wrong spot. & thank you in advance. I just swapped my old (but strong) D15B2 non vtec that came from a 91 CRX DX model with DPFI into my 89 CRX si. (I did swap intake manifolds) I reconnected all connectors accordingly including a brand new distributor & Alternator to the D15B2 and my Tach doesn't work and there is some type of surge/Electrical issue. When i test drove it yesterday after the swap, i had the headlights on and it ran fine until i put a decent load on the engine, hit the brakes, decelerated , or switch to high-beams - the dash-lights and headlights dimmed and the car almost shut off (Also instrument cluster went haywire - gas / temp went crazy along with all lights besides CEL went on) . I checked all grounds and wiring and it all seems to check out. Now could it be that i installed a d15b2 Alternator? The distributor is for a d16a6. Car has a unmolested D16a6 wiring harness. Any suggestions/input/idea/ ANYTHING! please let me know.