I just put in a d15b into my 88 sedan and the car will turn over but will not start.The problem i'm having is the main relay is making a loud "buzzing" sound as soon as i try to turn over the key at all.I'm pretty much stuck for know hope somebody eles has had this problem before waiting for my "helm" manual to arive !!!!

 

Connect the ECU ground to the thermostat housing. It sounds like you forgot it during the swap.

 

I have checked all wiring to the engine and i have also changed e.c.u. ,distributor,plug wires and main relay car is not getting any spark?????????