Hondata

I’ve been having similar issues to this with my turbo d17 that I’ve built. Always been able to start above 32F but will not start below. Just keeps cranking and cranking l. Have tried adding and subtracting fuel both ways to both the cranking fuel trims and the cranking pulse width tables and have ...

Yes, I understand, but isn’t it unusual that it only fluctuates when the ECT is below freezing?
It only does in when it’s below freezing, so can that be looked into deeper into the ECU what is causing it to do that? It just take out the reliability of the car if it keeps doing that during winter ...

It’s still not going to get addressed that the ECU fluctuates when it’s reading ECT below 32.
Literally the ECT will be 30F, won’t start, and voltage fluctuate. Then ECT will hit 32F, no problem starting, and no voltage fluctuation.
I hope someone will look at this more deeper than just saying the ...

I guess that’s another issue. I use the same battery in all of the datalogs with all the different temps.
It only starts the car above 32F and it doesn’t fluctuate the batter voltage when it’s also above 32F.
I’m just gonna continue to changed the ECT sensor when it’s below freezing temps.

Last 2 datalog, only attaches 5.

So I have a bunch of cold start here below 32F. I changed the cold cranking fuel trim lesser and lesser as I go along.
I know of someone also reported the IAT going high as well. It did on mine in one or two of the datalog while trying to start it.
Its still kind of weird that once the ECT hit 32F ...

Okay. So just to make sure. Under Fuel Trim in Cranking Fuel Trim?

it still says its rich even with adjusting cold cranking fuel. I dont think it reads the afr right away after it started.
It started because its above 32F. I will try again if it drops below zero. Thanks

Above freezing cold start, sitting for 2-3 days.

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Thanks for looking further into it. Here's a datalog with ignition on for a min. I don't think it read the 02.

I tried but I don't know if I did it right.
Here's a long log of cold start and towards the end I changed the ECT.
My only solution is still changing the ECT to start the car at below freezing temp,

Updates on freezing temps

bryantrinidad wrote: Fri Feb 18, 2022 12:20 pm COLD START Above 32F

I will update once outside temp drops again and on a PRA calibration

COLD START Above 32F