Hey guys. Need some input on a problem that has been on going for 2 months now, and still have NO answer!


I purchased Smanager back in december for my 99 Civic coupe, with b16a2. I also purchased a OBD2b conversion harness to work with the p28 ecu. It was pre socketed at xenoncron and sent out brand new. THe harness was also.

After installation, i started the car with the laptop plugged in and i was recieving a tach signal to the cluster, and the laptop. My tuner went to hop in the car to go out for a quick street tune till i could get some dyno time. When he jumped in the car, he accidently touched his foot to the conversion harness, the car shut off, and when i went to restart it, noting happened. Dead. Jeff reached down and noticed one of the plugs wasnt fully plugged in, so he pushed it in, and i started the car with no problems, but notcied that my tach on the cluster had stopped working? Fiddling with some of the wiring, we got no were. We said **** it, and iv been driving the car with no tach since.

Once in a while, i get a little curious and pissed off and try to attempt to figure out the problem. So far, I have replaced the cluster, hard wired the tach to the tach test wire in the engine bay, check the IGN fuse,(#9 15amp) and am 100% garentee that it is not the distributor as the ECU is still receiving a tach signal.

here is where things become wacky. Before i sold my Stock ECU i put it back in the car, and the tach works!!!! weird eh? I checked over the conversion harness 10 times now, finding nothjing wrong with it at all. and also used a different conversion harness that works in my buddys car.

Im stumped, got no idea were to go from here.

Any help is apprechiated! Thank you!!!!

McNeil!

 

You ever figure this out? Mine quite after using the obd2b - obd1 adapter with neptune.

 

Well, you figure the problem on your own. You need a new working ECU.

 

Care to elaberate? I actually believe my problem is my obd2b ecu supplied the tach signal instead of the distributor like OBD1 cars and now that I am running a OBD1 ecu I need to run a wire from the spare tab on the ignitor to the factory ecu harness terminal "A" pin #19 (engine pulse speed) to get the tach working again. I have not confirmed this but I think this is what I'm concluding from my studies.