donaldmejr

Guys I have a 88 CRX Hf with a 99-00 JDM B20 and my RPM guage has not worked since the car was built. I asked this question before and the first issue was the tach did not work and the car would "surge" (wasnt sure if it was from the dizzy or a leaking fuel line). I have replace the ignitor with another one from a LS and tested the coil but the tach still doesn't work. I got looking at the new "ish" ignitor and noticed that it had a extra terminal that my old did not have. I found online how to test my ignitor and looking at the picture of the dizzy it looks like a blue wire or tach signal should plug into that port. My 8 pin OBD2 dizzy does not have a single blue tach wire but ties with two wires from my OBD-0 crx engine harness. So my question is with the new ignitor because there is a standalone blue terminal is the reason my tach does not work? Do I need a ignitor from a 8 pin OBD2 dizzy? Also I have replace the cluster 3 times and no luck. I have included pics from my dizzy with my current LS ignitor.

donaldmejr

Guys I have read this in another post...

"Okay thought id explain this since I finally figured it out. Heres my setup:

1999 civic 4dr, d16y8, 5 speed
OBD2B - OBD1 conversion harness
Neptune software

MY INSTRUCTIONS

If you take the distributor cap, rotor and cover off you will see a spare male terminal on the ignitor (next to the rotor shaft), simply run a wire from that spare terminal to the blue deadend plug with the black weather cover over it on the driverside strut tower by the hood prop and BAM!! The tach will work."

Is this what I need to do but just hook it up to the blue wire on the HF engine harness?
OR
does it need to hook up to... Pin-B16 Labeled Speed Sensor?

Any help whould be nice.

donaldmejr

any help?

EJ1_Sleeper

yes thats what you need to do. your not getting a signal from your dizzy to your tach.

donaldmejr

ok so Ive done that and nothing and Ive ohmed the blue cable to the tach and nothing still...tried 2 clusters and still nothing

donaldmejr

anyone else have any ideas on that to check/test or do?

EJ1_Sleeper

from your ecu you will have the tach sense running to it from the dizzy. make sure that is fully connected, because the cluster reads the tach from the ECU.

donaldmejr

My ecu is a auto P28 ECU but I figured the shop that built the car knew to convert it...could that cuase the tach not to work? I did ohm the blue wire to the cluster and it was good...I've looked at a OBD1 pin out and I'm not sure where it goes to? do you know where it goes to?

donaldmejr

alright guys I found this ECU pin out but have no clue which pin sees the rpm pulses from the Dizzy

http://www.superhonda.com/forum/f55/...inouts-217405/

EJ1_Sleeper

I stand corrected the tach runs straight to the cluster. You've checked the wire from dizzy to cluster and it has continutiy through out the wire? The plugs are making full contact right? Also it could be a bad ignitor in the dizzy.

donaldmejr

Changed the ignitor again...and I read .6 ohms thru my Fluke 789 meter from the blue wire at the dizzy to the blue wire on the back of the guage cluster. Still nothing....

donaldmejr

anyone else have any ideas? I wish I had a obd1 dizzy.