I have a eg b16a2 w/itr cams. Has a s300v3 pro tune on it from previous owner. I've been logging and modifying the fuel table to get to my target AFR (12.9-13.1). I've been doing this off and on for the past 3 months without any problems. Today I decided do some more road tune. Everything when fine until I uploaded my changes to the ecu. I logged the first pull and at wot I was at 14.5-14.9. I pulled off and put the previous tune back on. I drive off and afr is way off on the this tune now too. S300 is now displaying 17.2-17.5 afr at idle but my PLX wbo2 is showing 14.6-14.9 afr.
Cold this be a bad ECU, s300, or wbo2? Or a voltage problem? S300 is displaying battery voltage around 14.4v.
Anyway, I had to correct the afr by -1.05v but I feel like that is not the fix.
Any suggestion would be appreciated.
Thanks!
-HT
Possibly Bad ECU,S300,WBo2??
Re: Possibly Bad ECU,S300,WBo2??
It could be the wideband or there could be a fuel system issue.
Re: Possibly Bad ECU,S300,WBo2??
Thanks! I’ll have to recheck the power wire. I do have the wbo2 wire, that runs from PLX box to the ecu, really close the the gas paddle. I’ll have to check that wire too.
I forgot to mention that I did have a flashing red light. I decided to disconnect the battery to rest the ecu. After I did that, the red light went away and got the green light back.
I forgot to mention that I did have a flashing red light. I decided to disconnect the battery to rest the ecu. After I did that, the red light went away and got the green light back.
Re: Possibly Bad ECU,S300,WBo2??
So, I this morning I took my multimeter out to measure the voltage at D14. Got 1.6v at the on position. I tried to start the car and got a CEL P0136. I tried several times and the car wouldn't start. Reset the ecu and tried to start the car again. It fired right up, no CEL now. AFR is still way off showing 14.5 while PLX is showing 13.2. I tried to correct it but every time I do, it seem to go off on it's own again. I hooked up an AEM WBo2 and it shows 13.6 (AEM o2 is hooked up right after the header, probably 4" from PLX WBo2 - PLX WBo2 is on the header). So, PLX and AEM are fairly close to each other but S300 is far off. I look at the ecu and I have a flashing red light. What does this mean?
https://youtu.be/tKPk8lYS6aE
https://youtu.be/vVpDqaZk2Sw
https://youtu.be/tKPk8lYS6aE
https://youtu.be/vVpDqaZk2Sw
Re: Possibly Bad ECU,S300,WBo2??
Do not use D14 for wideband input, as it cannot see the full voltage range. Use D10 instead: http://www.hondata.com/help/smanager/wi ... b=wideband
Re: Possibly Bad ECU,S300,WBo2??
I have read up on that but since it's been running fine on D14 I didn't see the need to change it.
Anyway, I fixed it... I hope/think I did. So I decided to re-wire my connection to D14 (^_^) and use the AEM wbo2. I measured the voltage on the analog wire and compared it to smanager L.volt for wb. They were only off by a small hair (-.04v). S300 and AEM gauge were pretty close now. I decided to switch back to PLX wbo2. Now it was pretty close as well now too. Tried a different map and AFR is still very close. Much better than it was when the problem started. So I decided to put everything back and checked the AFR again. AFR is still good. I hope that was it. I must have pulled the wire because it is run next to my gas paddle.
I did notice something interesting in going through this. PLX AFR to voltage was a bit off in smanger. I noticed that PLX gauge was displaying 14.8 at 2.51v. Once I set that in the AFR parameters, S300 now closely matches the PLX gauge. I would say it is almost perfect, 99.99% dead on. I just wanted to share that.
Another thing... Is it suppose to flash a red light all the time? I didn't know if that was normal because after all it, it is still flashing. I'm going to reset the ecu again and see if that will help.
Anyway, I fixed it... I hope/think I did. So I decided to re-wire my connection to D14 (^_^) and use the AEM wbo2. I measured the voltage on the analog wire and compared it to smanager L.volt for wb. They were only off by a small hair (-.04v). S300 and AEM gauge were pretty close now. I decided to switch back to PLX wbo2. Now it was pretty close as well now too. Tried a different map and AFR is still very close. Much better than it was when the problem started. So I decided to put everything back and checked the AFR again. AFR is still good. I hope that was it. I must have pulled the wire because it is run next to my gas paddle.
I did notice something interesting in going through this. PLX AFR to voltage was a bit off in smanger. I noticed that PLX gauge was displaying 14.8 at 2.51v. Once I set that in the AFR parameters, S300 now closely matches the PLX gauge. I would say it is almost perfect, 99.99% dead on. I just wanted to share that.
Another thing... Is it suppose to flash a red light all the time? I didn't know if that was normal because after all it, it is still flashing. I'm going to reset the ecu again and see if that will help.
Re: Possibly Bad ECU,S300,WBo2??
Do you have on-board datalogging enabled?
Re: Possibly Bad ECU,S300,WBo2??
No, I've been logging with my laptop.
I did a few pulls today and AFR is back to normal. It also looks like the flashing red light is gone too. I think I'm good for now.
I did a few pulls today and AFR is back to normal. It also looks like the flashing red light is gone too. I think I'm good for now.