Whats up Honda-Tech!

Things are going well with my b18a1 swap in my 89 hf crx. All codes are gone with the exception of Code 13 (Barametric Pressure). Got the manual in front of me and all it says is take it to a dealer.

Anyone know how to fix it or am I just stuck with it lol. I'm not running a cat nor emissions. Where I live its not a requirement.


Side Note...

So far it easily carries the extra 500lbs of stereo equipment through the hills of Cali averaging 39.6mpg. Still got some tuning to do but I'm very impressed that with a 50 over bore it get this good of gas mileage. Without equipment it averages 43mpg highway and 35 in town as long as I'm not railing on it lol.

 

Talked to a Tech in Oregon and he says with the pr4 ecu code 13 has to do with the ac. As I took it out for the swap I wont be worried about it for now. I'm told I can take it to a shop and they can clear it for me.

I dont care for the engine light so I pulled the bulb lmao!!

 

What manual did you get? Don't tell me... HAYNES?

 

Yes indeed it is a Haynes Manual lol

 

https://honda-tech.com/forums/honda-crx-ef-civic-1988-1991-3/code-13-a-2913614/

 

Thanks Nick!

Now the question begs to be asked... how integral is it? Guess thats what I'm gonna research next lol

 

the sensor changes the fuel ratio based on elevation, so I would get one as soon as you can

 

How much better mileage could I possibly get? Its a shokingly 39.6 mpg fully loaded with equipment going through the mountains of California.

I travel 85.2 miles ea day as a commute. 30 city 55 highway and I'm getting 34.8 mpg. I've been filling up ea way and ticking off the miles.

 

Don't know how much better mpg you could get if any, it would just make me feel better about my car knowing as you go through the mountain the ecu knows to adjust the fuel ratio if you change much elevation

 

Update on fuel mileage lol

After 3 days of the daily commute 287.3 miles 7.98 gallons consumed = a big *** smile on my face lmao!!!

Pulled fuse, reset computer, codes still there engine light is on, checked voltage all is good.

I dont have another pr4 ecu lying around but I do have the pm8 that I took out. Can I use that ecu to check? Aside from the fact that it will probably run like sheyot it was working with that sensor. If I can this will tell me if I need a new ecu or sensor.

 

Did you cut B89 and B122 that go into the ECU?
i found this post - not sure if it's relative info or not -
https://honda-tech.com/forums/honda-crx-ef-civic-1988-1991-3/91-ls-into-89-hf-982646/

 

Thanks for the info!

Can anyone verify this for me?