Odd voltage regulation, other kind of tuning ECU no problem

[PsychoWizard]

Goodmorning all,

A strange kind of event happens. Would be great if anyone could have a suggestion! As soon as the lights turned on, or something like the windshield wipers are used the AFR's turning really lean. We tried 2 situations with no adjustments to the car itself.

The troublesome S300:
[/url]https://youtu.be/bdSKxKhHvr8

With a Moates Demon V2:
[url]https://youtu.be/ly3ZNwSvF9g

- Injector Deadtimes are filled in correctly
- All of the Troubleshooting topic is checked, but unfortunately there is no datalogging captured.
- Also, we replace the S300 board into another Hondata ready P28 ecu but still the same result.

Any help would be fantastic, thank you in advance!

[Hondata]

Calibration, datalog, details about the vehicle, especially injectors? I almost guarantee that your dead times are incorrect.

[Bor_]

Hi,

Your help is very much appreciated!

I'm the owner of the car, I'll try to provide all the requested details.
For your info:
Location = Netherlands
Bor_ = Owner
PsychoWizard = provided the P28 ECU + Hondata S300
Anti-lag Performace = Swapped the engine and build the turbo setup
Manlong (Real tuning performance) = tuner

I know a lot about Honda's but ECU stuff is not really my expertise, so forgive me if I'm not able to answer everything correctly the first time.
Probably have to ask one of the parties named above for the correct information, so that might take a moment. For now.

Calibration: Not sure what you mean by that?
Datalog: Unfortunately the tuner did not make that, because he checked everything three times and then went on with the Demon V2 so he could finish the base map that day.
Details:
Honda Civic EK3 swapped with build D16z7; honed 75.5mm, Eagle rods, Wiseco pistons 75.5mm, Grams 550cc injectors.

Relevant info:
Before the ECU was sold to me it has been virtually checked, no issues were found. But it must be said that they can't simulate electrical load.

Tuner is familiar with Hondata chips. He checked the values three times. What we checked / tried: extra ground cables to block, swapped alternator for another OEM one. To rule out any electrical problems that can cause this issue. Used a second P28 ECU with Deamon V2, no issue as shown in the TS his video. Currently, the car is running on that ECU (1500Km on 7psi boost without errors).

We thought the ECU itself might caused the issue, put the same Honda S300 chip in another (Hondata ready) P28 ECU and it is giving us the same exact issue. So our conclusion is that the problem is not caused by the ECU itself.
Put chip back in first P28 ECU. The second P28 is sold and the new owner used his own Hondata S300 chip and with that setup he had no issue. Again a confirmation that the ECU itself is fine.


Please let me know if you need any other information.
Thank you in advance.

Gr. Rob.

[Bor_]

Message from the tuner:

Dear Hondata,



I was tuning Rob his car and after a time I noticed that the car was running really lean on the idle when we turned on the light. 

I do this kind of tests a lot by turning the lights on because I had one time that the ecu was not doing properly its work so almost ended by destroying the engine.

I have tuned around 5 cars with hondata and I also never had this issue with the cars they just working good and also with bigger injectors. I tuned around 100 cars with using HTS or doctronics.

After I have noticed the problem from Rob on his car I tried to check all the possible causes and this was also on the dead times. I have turned all the dead times around because sometimes grams injectors don’t give the properly dead times. 

After 1 hour of testing I was done with this fault and started to use my own demon hts ecu to see if the fault was on the car. I typed in the same dead times from the ones I used and it was working good. I finalize the car by tuning it on HTS and the car is now still running properly. 



Hopefully this message give you a right explanation of everything about this ecu.

Gr Manlong
Realtuningperformance

[Bor_]

Dear Hondata,

Could you please take another look at my problem, and let us know your wisdom? We have no clue where to look for or what to test anymore.

I would highly appreciate the effort, my potentially 300HP car is now waiting for more than 6 months for the final tune so I can (hopefully) finally enjoy the build.

Gr. Rob.

[Spunkster]

Without the calibration and a datalog showing the issue there is nothing for us to look at.