Hacking up Honda's ECU
It is currently Sun May 28, 2023 12:11 pm

All times are UTC - 5 hours [ DST ]

Post new topic Reply to topic  [ 1 post ] 
Author Message
 Post subject: P28 problem
PostPosted: Mon Sep 09, 2019 4:19 pm 

Joined: Sat Aug 25, 2018 5:50 am
Posts: 1
Hello, I'd need some help with my chipped p28 mini me.

I have a d14a1 with d16y8 head, z6 intake and a8 4-1 exhaust. 11 static comp, 10.5 dynamic (used a calculator for this one with stock y8 cam data so don't know if its a reliable number).
Managed to get my hands on a p28 that has been chipped and supposedly the map has been made for the same engine. Been driving like that for 7 months, the engine didn't blow up, but today I went to annual vehicle inspection and when they plugged in the emissions test, it showed that lambda was 1.05 idle and around 1.15 in neutral from idle to 4000 rpm.

I went home, plugged in a stock p06 ecu and passed emission with lambda exactly 1 at idle and at high engine speed but the car is significantly slower.

Then I cut the J1 jumper on my p28, disabling the chip and running it on stock map. Since I don't have access to a wideband, I'm using hondash to read ecu data and get a general idea of whats going on.

Hondash was showing a +30% stft and o2 sensor was reading 0.1V, idle was all over the place with iacv around 30% but rpm between 500 and 800.

I plugged in the p06 again and o2 readings were good, stft was oscillating around +5%, idle was good.

With all this stuff going on I came to the conclusion that my p28 is not working properly. Is this a know problem, is it possible that the guy who socketed it did something wrong or any other idea?

Its a 6th gen civic ej9, originally it had a d14a3 in it which has parallel injectors 1+3 and 2+4 wired together. I changed to a d15z6 engine harness and I'm using a obd2a to obd1 harness from ebay. I've checked the harness and spliced the vtec oil pressure switch to the vtec solenoid wire.

Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 1 post ] 

All times are UTC - 5 hours [ DST ]

Who is online

Users browsing this forum: No registered users and 16 guests

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  

Powered by phpBB® Forum Software © phpBB Group