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Post Info TOPIC: Problem with the ECU not compensating for boost


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Problem with the ECU not compensating for boost


I think I might have the LC1 hooked up for the wrong pin out for the ECU because Rodney said the bike is running super lean when it hits boost and won't compensate for boost. The 3 bar map sensor is working. I have the analog 2 wire from the LC1 running to pin 12 on the ECU but is that correct? Should it run to 41? 12 is the O2 sensor signal but 41 is the O2 sensor heater? Also if the wideband option is de-activated but the LC1 is still hooked up will that throw it off or does that not matter? Analog one of the LC1 is for a narrow band 0v-1v but analog 2 is for wide band 0v-5v. This is a Gen 2, Thanks!


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-Dasan


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Hi,

Pin 12 is the correct pin for feeding the signal from the wideband into the ecu, use the 0-5v output from the wideband and feed it into pin 12.

However this is not a closed loop, the 0-5v AFR signal is not used in real time to adjust fuel maps, it is just captured and sent out with the engine data when data logging allowing you to use ecueditor autotune to make changes to fuel maps and flash the changes back to the ecu.

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jkwool wrote:

Hi,

Pin 12 is the correct pin for feeding the signal from the wideband into the ecu, use the 0-5v output from the wideband and feed it into pin 12.

However this is not a closed loop, the 0-5v AFR signal is not used in real time to adjust fuel maps, it is just captured and sent out with the engine data when data logging allowing you to use ecueditor autotune to make changes to fuel maps and flash the changes back to the ecu.


 Gotcha. Any ideas what would cause the ECU not to compensate fuel once it hits boost? The injectors are wired correctly and the FP regulator is working. John mentioned some ideas on SH.org, I'm just trying to help save Rodney some time and research what the issue could be.



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-Dasan


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which version of boost fuel is he using?

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Honestly I'm not sure. I'm assuming it's just an issue on my bike because he just did my friends 640hp bike a few days ago and didn't have any issues. I'm thinking the LC1 or boost controller (boostbysmith's) is causing an issue because the boost controller is hooked up but de-active while he tunes it and the LC1 is hooked up to the ECU but the wideband option is not active as well because he's using his own sensor to do the tuning.



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-Dasan


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ok, i really dont think it would be the wideband, it may be one of the other things you mentioned though, you are in good hands with Rodney. Let me know if he thinks it is software related as i will be able to help with that side of things.

Cheers
-Justin.

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jkwool wrote:

ok, i really dont think it would be the wideband, it may be one of the other things you mentioned though, you are in good hands with Rodney. Let me know if he thinks it is software related as i will be able to help with that side of things.

Cheers
-Justin.


 Ok sounds good, Thanks! I definitely trust him I just feel bad because I was hoping it would be an easy tune and these issues are coming up.



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-Dasan


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I have a dumb question - is this in reference to gen1 or gen2? I didnt think you could data-log a gen1....

If it is gen1 - can you wire in a wideband into pin 12 for autotune?

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icemansid wrote:

I have a dumb question - is this in reference to gen1 or gen2? I didnt think you could data-log a gen1....

If it is gen1 - can you wire in a wideband into pin 12 for autotune?


 You are right, this is for gen 2...



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Deespeed99 wrote:
I think I might have the LC1 hooked up for the wrong pin out for the ECU because Rodney said the bike is running super lean when it hits boost and won't compensate for boost. The 3 bar map sensor is working. I have the analog 2 wire from the LC1 running to pin 12 on the ECU but is that correct? Should it run to 41? 12 is the O2 sensor signal but 41 is the O2 sensor heater? Also if the wideband option is de-activated but the LC1 is still hooked up will that throw it off or does that not matter? Analog one of the LC1 is for a narrow band 0v-1v but analog 2 is for wide band 0v-5v. This is a Gen 2, Thanks!
 
Mate also having issues in boost fueling big time, is your tuner available to have a chat as wouldn't mind comparing some findings with another real time tuner. One of the issues I'm finding is that any fuel cell value made at a given rpm is changing / affecting the fuel map across the entire rpm range and not just at the rpm where cell values are modified.
Also get him to flash the ECU not in fast baud rate as also getting issues with bogus codes being generated but only when ECU is flashed in fast baud mode.
  I'm in Oz but quite happy to call him if and when he's available as writing pages of type one still won't cover the probs and ends up like a serial conversation.

 



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