Hey guys I'm new to this forum so if im in the wrong place or doings something wrong I'm sure you will let me know lol , but anyway, I just purchased a 96 civic hatchback with a b16b swap , my problem is the ecu, the original owner was running it on a p28 but something went out on it so he put in a gsr ecu for the mean time , so I'm just wondering where do I get another ecu and which ecu would work the best? The motor is completely stock besides headers and intake and I plan on keeping it that way for right now , I asked the original owner if a ctr ecu would work being that it's a ctr motor but he said no so I'm a lil confused now would really appreciate the help guys , thnx!

 

If it functions (obd1 gs-r) than don't change it

 

could get a obd2a pct ecu...?

 

I'm thinking it has to be obd1 , but what do I know 🤷🏻‍♂️that's why I'm here lol

 

obd1, it needs to be.

 

you have two options:
1) PCT ECU, which is OBD2b. (if my memory is correct) You'd need to convert with a harness to your car's OBD2a plug config. Depending on what the original owner did for wiring, you may be in for a long list of problems. But it would be OEM correct.

2) chipped ECU, which could be pretty much any OBD1 ECU provided it has the right hardware installed in it and the right program/maps in the chip.

 

it was a chipped p28 and I'm guessing it was set up for the b16 , I can post picks for you to see but its taking long for the pics to get posted 🤷🏻‍♂️ , its wired by rywire. I really wish I could run the ctr ecu but like you said its obd2 , and when you say OEM what would you be talking about?

 

would it be easier to fix the chipped p28 that was originally in the car for that motor the only thing wrong with it ( at least that's what the last owner said) is the fuel pump signal

 

I would..... it is likely that it's the very common problem of the electrolytic capacitors going bad with age.... one of these caps sits right on top of the fuel pump line and causes the pump to not prime.
replace all of the larger capacity caps and it will likely work fine.

based on the other thread... 7rrivera7 will take care of it for you... also read this... https://honda-tech.com/forums/engine...-them-3279850/

 

thanx! , I looked at my ecu and it is leaking, I'm pretty sure that that's the problem hope it's not to late to save it🤷🏻‍♂️

 

I've salvaged some that were in pretty bad shape. He knows what he's doing, he'll take care of it for you.

 

EK9s were produced before 99, so it’s more likely that they would all be “obd2a” before all being “obd2b” but I believe there are both. Correct me if I’m wrong.

BUT, since OP was told by PO that a PCT ecu would not work AND he has an aftermarket harness, I’d like to see a picture of the cabin end of the harness to confirm what ecus will work.

 

I have a rywire harness obd2 to the engine and obd1 to the ecu , I finally got a hold of the guy who sold me the car and asked why its obd1

 

He probably never intended to run it on a stock ecu, and that's somewhat to be expected. It doesn't need a jumper harness, so consider it to be a favor he did for you - They are all eventual failure points.

So no, you won't be running a PCT ecu. Best bet is to repair or replace the P28 and get it mapped to run the engine. How much money are you looking to spend? Do you have to do any emissions testing where you are located?

 

Should the p28 already be mapped being that he was running it on that ecu before ? And no emission testing here where I live .

 

There's no telling really. Depends entirely on whatever he put in there. There's no real way to tell if he had it tuned and chipped or stuck a BS eBay chip in there. Best bet would be to pick up an S300 and get it tuned.