Originally Posted by Elijah Major

So on your distributor there’s a blue wire with light blue “highlights” or stripes or whatever you want to call them. This is the one that send signal to the tach. Take it and a length of wire, and look at your engine bay on the drivers side near the firewall where your harness is emerging. There’s a wire with a plug in connected to a wire on the harness. It’s the only one with a connector and butt on it if you have a factory harness. Connect the two. Your tach will work fine. Add some shrink wrap or electrical tape and add it to your harness and your tach works. I had the same issue. Good luck!

Originally Posted by Jvke

I’m running a chipped p28 in my 99 hatch b16a2 swap and my tach stopped working im sure it’s because I have a obd2 dizzy...Is there a way to modify my current one for it to work or do I just buy a conversion harness ?

Originally Posted by muellersfan

A stock OBD2B 99 Civic is not wired to get the tach signal from the distributor. You must do it yourself.

Originally Posted by Jvke

add a wire from the blue wire on the distributor to the connector located on the driver’s shock tower

Originally Posted by Jvke

I’m running a chipped p28 in my 99 hatch b16a2 swap and my tach stopped working im sure it’s because I have a obd2 dizzy...Is there a way to modify my current one for it to work or do I just buy a conversion harness ?

Originally Posted by Jvke

I have a similar issue too on my b16a2 swapped hatch, I just put in a chipped p28 and everything works fine but my tach stays at 0 but when I plug in the stock p2t ecu it works. Do I have to get a obd1 dizzy and get the obd2b to obd1 harness or can I modify my current one to fix the tach ?

Originally Posted by Jvke

I recently put a chipped p28 in my b16a2 swapped ek hatch and my tach just sat at 0. I know it works cause I plugged in the stock p2t ecu and the tach was working. Jumper harness is new so I know thats not the problem....I’m running a b16 dizzy, do I have change it and put a obd1 dizzy with the obd2b to obd1 harness or is there a way to modify my current one to fix the tach ?

Originally Posted by JRCivic1

You stated the tach "stopped" working... does this mean it did in fact work at some point with the B16A2 swap installed or are you saying "my tach worked fine until I installed a B16A2 swap" ?