Hondata

3-21-22 update

After the ECU cleaning, the car is still running terrific without any mechanical changes. HVIRACEMAF tuning is complete. Cruise is still super stable (no more mountains at all) and top rpm under full boost is very stable as well. This is my last update to the thread. If anyone wants ...

Thanks for the information.
Glad you go the issue resolved.

I'm assuming it is more an issue with poor connection than crosstalk. Especially if the sensor is unbuffered changes in the impedance with the connection could change the voltage level read by the ECU.
It is likely that vibrations while ...

The solution that absolutely solved this issue was to clean the ECU terminals of all the transparent/bluish colored siliconized grease that was on there from the factory. there were little tiny bits at the bottom of the ECU pin sections where it looked like those little globs (whatever you want to ...

SOLUTION WAS DISCOVERED.

Not a tuning or mechanical issue of any kind.

Will post info by mid-week. 👍

This is stock 2017 R with exhaust map. Put all stock components back on except for RV6 exhaust and frontpipe. Totally stock intake arm, filter, IC piping, etc.

Hondata wrote: Fri Mar 11, 2022 8:56 amAFM-stock.fpdl

File loads blank. Nothing there once downloaded.

The changes you are making are not going to identify anything one way or the other.

When I said to test things one at a time, I meant from a completely stock vehicle change one thing at a time.

It goes back to the two basic approaches - start from a known good position and change one thing at a ...

After driving more with the charge pipe sensor unplugged, it limits the throttle when attempting to build boost.

But has no effect on vac state afr or vac regulation.

Problem is, if I go back to stock, that's no hondata. Can't monitor anything. And with the stock intake, you can't feel any surges while cruising. So that's not a viable option for diag to go completely stock.

If you mean stock parts while retaining hondata, I could do that, but what if there's an ...

1. Test / change items one at a time...


Perhaps you can help with this info I got today:

If I unplug the MAF while the car is running, it'll chug/stall.
If I unplug the ACT while car is running, the AFR goes even more irratic.
If I unplug the MAP on the charge pipe...nothing changes. Except ...

This was another revision we tried. The issue is not MAF scaling related.

Well, beyond what has already been discussed, here is a screenshot of another FK8 with the same exact mods under a screenshot of mine. PRL Racemaf as well. Only, the AFR doesn't oscillate as violently as mine does.

This fk8 is tuned by the same tuner and was running the same tune as I was.

So ...

So you're saying that all the data I have shared is what all fk8 owners with downpipes and racemaf PRL intakes experience?

We have run tunes with the primary O2 disabled, the secondary disabled, both disabled, cat cycles disabled, all ports on the PRL intake plugged, all ports wide open, bypassed bypass valve, bypassed bpv sol, pcv venting to atmosphere, pcv plugged. We've pressure tested to 18psi the entire motor; from ...

Narrowed down to what, a phantom? Voodoo? Sorcery? Sounds silly, but the Tuner and I made it to the end of the flow chart with no more flow (if this, then that) scenarios and also no result.

At this point we are adding to the diagnostic process for others to build off of in this apparent NFT ...