😍
Thanks for stopping by to read my cries of sorrow...
​​​​Its a 2000 ek ex sadan,b20b that idles low and I have no rpm.
It has a step down with a obd1 p28 ecu.Now the harness I have now HAS been cut/tempered with.Idk the origins of it basically.I did happen to replace the harness today 8/11/18 but now has a low idle.Maybe I missed sometsomething?
The newer harness is in mint condition,unmolested off a 2000 LX 5 speed.CEL light is on but can't get it to read,I also have no cat or resi.

Help me!
Where can I begin to look for the No rpm and low idle issues?
Every answer is appreciated.

 

I'm surprised it's even running with no RPM being displayed. Usually the rpm signal comes from the crankshaft / camshaft position sensor. Are you sure you remember to plug both back in? Also, if it's idling low but not rough, I'd make sure you plugged your IAC valve ( or whatever equivalent your car has ) back in.

 

I will look into it soon I get home.

 

2000 civic's get rpm from ecu, you eliminated the obd2b ecu and are now running obd1. You'll need to source another rpm wire. your issue with low idle is now null until you get an rpm to see exactly where its idling at.

What method you used to pull code?

 

Can't get it to read that's another issue man smh

 

What method did you use to "try" to read code?

 

OBD1 systems have a tach drive wire from the ICM inside the distributor. This wire only operates the tach, and maybe the ABS and SRS to tell them the engine rpm. OBDII has an output from the ECU to the tach.

The OBDII LX had a 3-wire IACV. You will need to rewire your harness to a 2-wire IACV to run with your engine and ECU.

 

Went down to the nearest AutoZone near me.

 

Christ that sounds like hell..
Any vidz or anything elsewhere else I could look up,thank you man.

 

Went to the closest AutoZone unfortunately.

 

Since you have an OBD1 ECU, you read codes with the OBD1 jumper wire and count the blinks method. The OBDII plug in your car no longer connects to anything. AudoZone doesn't know anything but plugging in to OBDII, even that they barely know.

 

Noob question..how do I get a obd1 reader?

 

blue connector can be found in passenger kick panel near the ECU.

 

Nice, I'm about to give it a try now.
​​​​​​ Gotta find a paper clip now 😂

 

If you want something with a bit more bells and whistles than a paper clip: https://www.hondash.net/

 

A wire will do

 

My idle issue is solved. Thank you gentlemen.

 

So what was the problem in the end and what was the solution?

 

Took it to a local shop and they calibrated my TPS.
Some adjustment on the throttle cable and boom all done.

 

good diy on tps install:

https://honda-tech.com/forums/tech-m...e-tps-2947986/