As the title states I've dropped a bone stock B18B1 into my 98 EX while using a 97-00 CRV distributor. And after wiring it all up the engine fires up and runs but I have no tach. I used this diagram to wire it up:



So here is the layout in my car:

OBD1 P75 ECU - OBD2 to OBD1 jumper harness - 96-98 EX engine harness - 97-00 B20 distributor plug wired into EX engine harness - B20 distributor.

Any clue why I have not a working tach? I know it worked before no issue in the previous car. And I'm fairly certain I don't have the light blue and dark blue wires crossed. So I'm thinking if I'm reading it right I need to wire in an RPM signal wire?

 

What year is the b18? Why didnt you use the dizzy from the b18?

 

Oh whoops, read it wrong

 

Not 100% sure what the year of the B18B1 is, and the reason I didn't use the dizzy from that engine is because I didn't get one with it. The B20 dizzy is what I had available to me, I've still not found an LS dizzy to use. And since I've already converted to the B20 dizzy wiring if I can make it work I'd love to.

I'm pretty sure though I'm going to have to find the RPM signal from the ECU and wire it into the dash harness to the tach wiring.

 

I read something about having to rewire the jumper harness when doing these types of switching, because of how single cams dont have the rpm wire, try finding a single cam dizzy and see how it treats you. Why not use a teg ecu if you are going to be running a stock motor?

 

Will a d-series dizzy work on a b-series engine? Didn't know that was possible...

And the reason for using the OBD1 P75 is I've chipped it with a stock LS map. That way I can shut off some unwanted things.

 

On that pic you posted, it dont have the crv listed, so maybe the crv dizzy is of a differentt wiring schematic? But yes, youll have to wire directly to the dash. Find the pinout diagram of a stock civic and go from there. Your issue is PROBABLY due to ince its controlled by the ecu, the harness dont have a tach wire built into it. So since you are using a ecu that has a pinout for it but a harness not made for it. It wont work. Thats my shot in the dark but atleast its something lol. Hope it helps!

 

You said 97-00 distributor. Do you know exactly what year it is? One of the big differences between 96-98 and 99-00 is where they get the tach reference signal, so if you're mixing and matching between the two, you'll have a problem.

 

Not sure, but it wouldnt hurt to try? Especially if you can compare..like i said, its my honest shot in the dark. Either do some wiring if you are confident. I imagine youd have to find the tach wire on the cluster, and just run that to the dizzy..

Edit: disregard what i said, but i think the harness may habe something to do with it.

 

I do not know the exact year sorry... The part # on the dizzy is TD-97U 7Z11 if that helps?

 

Thanks for the help, I think you're right. I'm going to have to figure out how to wire the rpm signal from the cluster to either the ECU or dizzy. Not sure which yet...

 

Hope you figure it out my man!

 

Something tells me I'm going to find me an LS dizzy lol but I'll see if I can get this to work.

 

Haha true but dont rule out the harness. It may be a bit extreme, but try finding a em1 si harness. Im thinking single cam harness dont have a tach wire built in like how b series are. Especially since you said the motor fires up just fine.

 

I got a b16 harnwss in my car when i swapped a b series motor in and my tach works.

 

I built a B20V in my del Sol using the stock D15B7 cabin/dash/engine harness. No issues, but I also had an LS dizzy when I did that a well. So don't think it's the harnesses I'm using. I just think the CRV uses a signal from the ECU where at everything else uses a signal from the dizzy.

I think I need to run a wire from the tach wire to a specific wire on the ECU I've not looked up yet.

 

Tach not working right after ECU Swap - Team Integra Forums - Team Integra