imported_falcon151

Hi guys let me explain my issues.

I have a JDM B18C(1) GSR/SIR-II motor in my 1998 1.6 EL using the stock auto engine harness and a ODB1 manual P72 ECU with a conversion harness. I have done a complete Manual swap and rewired the IACV etc already. I have replace my ODB1 (round 4 wire plug) Alternator with a new Alternator from a rebuild shop. I was using my D-series alternator that I modified to fit the spot but it eventually went on me. The D-series have a oval plug with only 3 wires. Now I am having an issue with the new Alternator where it is slightly too high of a voltage at idle (15.2+ V) and the charging/battery light never goes off.

What I am looking for is someone who has done a ODB1 swap into a ODB2a car and had sucess with there Alternator.

Please let me know if you have any insight here and please ask questions if something is not clear here.

chris_si98

ive personally never heard of this problem when swapping alternators..

From what ymm alternator did you get?

Cynikal.Mindset

could just be a defective regulator in the altenator

gooseshit

u should of bought a 99-00 sir alt.

Capo

Double check all your wiring because if the charging light doesnt go off something is wrong there. I had a similar problem and was confident i had the wiring right but turned out i had 2 wires switched due to bad info on the net.

Would advise to take out the alt and have it tested.

imported_falcon151

More info: The regulator checked out ok. Still seems like a wiring thing but the shop figures the unit is receiving the wrong signal again wiring. I am looking into the SIR Alts... can anyone confirm that these have the 3 prong oval plug end? I can change this Alt for a SIR one for free at the shop if they can get one.

Capo

Looks like the SiR alt does use a 3 wire plug. I would double check your wiring though because its most likely one wire is switched. What car did you get the 4-wire plug off of and did all the wire colors match up or no?

imported_falcon151

My Car has the original harness which came with oval 3 wire. The Engine was a 94 JDM B18C so it had the ODB1 round style plug.

Thx for the pic!

Capo

I was under the impression you put in a new alternator that has a 4 wire connection and you swapped the plugs on the harness from 3-wire to 4-wire?

imported_falcon151

its complicated but I had a shop build me a GSR Alternator with a civic regulator. This is causing issues. I have now confirmed that the SIR 99-00 will work 100% so I will just but one of those ones and return my built one.

Thank you for your responses issue resolved