Hondata Reflash - 12 Knocks - Would really appreciate help

[tbangash]

Hello,

I am new to the hondata world. I have the hondata reflash running on my car and received 12 knocks in my 30 minute drive. I have attached my datalog, can anyone help me reduce these? They only seem to happen on WOT in 2, 3, 4, 5 , 6.

Thanks in advance.

[EFICU]

Hello,

I am new to the hondata world. I have the hondata reflash running on my car and received 12 knocks in my 30 minute drive. I have attached my datalog, can anyone help me reduce these? They only seem to happen on WOT in 2, 3, 4, 5 , 6.

Thanks in advance.

What generation is this, a 9th gen Si? Can you post the calibration you're driving on?

The knock isn't really a big issue, your fuel trims and overall fueling are really bad. The fuel trims are almost maxed out trying to keep the part throttle AFR in line.

Also let us know what mods you have done to the car.

[tbangash]

Hello,

Apologies I should have added more information.

2015 Civic Si Sedan ~90,000 km - completely stock
Location: Richmond-12m above sea level, ~36'

I am using the hondata reflash map that came with the hondata.

[EFICU]

No problem. Do you have any modifications done to the car, intake, exhaust, anything like that? If so, let us know which brands.

[tbangash]

Hi,

No modifications done what so ever. Bone stock. Is it that bad? Is something wrong with my car?

I did have the PRL 3.5" SRI on my car for two days. It ran really bad so I took it off and converted back to stock intake. I drove for 30 minutes after taking the intake off, and then started taking the data log. I wonder if that caused anything?

Thanks

[EFICU]

Interesting that the fuel trims would be off that far off with it being all stock. Let me look through some files to see why it might be acting this way. Do you still have the PRL intake, if so, are you wanting to use it if the tune is right?

[tbangash]

Hey EFICU,

Yeah, I still have it and would use it if I had the right tune. I was getting insane knocks with it with the hondata prl cai with dp tune and therefore took it off.

I did another datalog today on the way home from work. Not sure if this helps.

In the datalog I sent you yesterday, I was driving pretty hard, this isn't how I would normally drive but I wanted to capture the high revs in the datalog.

The datalog2 from today (attached) is how I would normally drive.

Do you recommend I reset the throttle body? or clean the MAF sensor? I have the plug in device that reads the engine codes that can reset the throttle body.

I should also note, the PRL intake I had on for two days, I did wash and oil the filter before installing it. I let it sit for 2 days so it was pretty dry. I wonder if the oil messed up the MAF sensor? Not sure if that would affect anything as the hondata reflash is MAP based.

Thanks!

[tbangash]

Datalog 2 Attached.

[EFICU]

Yeah that is really odd, that last datalog looked a lot more as it should than the first datalog. Even in the previous datalog at idle, your fuel trims were almost maxed out, it wasn't even during the driving portion, just sitting at idle they were almost maxed. So something was weird there in that first one, it could have been filter oil as you mention, but it's hard to say. I wouldn't do anything right now, let's make another datalog with this revision I am posting for you. I made a couple MAF scaling adjustments, and I remove some ignition for the knock it showed. Let's see how this one looks and then we'll go from there.

It shouldn't be a problem to tune it for the PRL intake, granted that filter and potential oiling has stopped causing a problem. The 3.5" intakes are easy to tune for, but we can reinspect that once we establish a good base here with it all stock. Once we know everything is working as it should, then we can go back to the PRL intake. Take this one for a spin when you can.

Hondata Reflash - Rev01.fpcal

[tbangash]

Hey EFICU,

I uploaded your calibrations and made the following two datalogs.
- Datalog 4 - I tried to get 2nd and 3rd gear pulls and a little bit spirited driving - 6 knocks ~10 min duration I think
- Datalog 5 - I drove like how I would normally drive and I believe it was 2 knocks, both 6 gear I believe.

Additional information:
- Running 94 octane fuel/no ethanol
- I do have a hasport 62 dog bone mount, totally forgot about this, changed this last year.

Thanks again for your help!

PS it would be awesome if you could help me do a tune for the prl. I absolutely love how it sounds, it would be so good to have that on the car.

[EFICU]

Yeah that's weird, the fuel trims are back to being off target by quite a bit again. That's interesting...

Since you're wanting to run the PRL intake, I say let's go ahead and focus on tuning it with that intake. How soon can you have the intake on? I would recommend we go through and tune everything properly by going through and tuning each cam angle one by one. Then blend out the cam angle map and vtec RPM based on that data. We're probably looking 10-12 revisions, but that would make sure it's all dialed for the PRL intake. While you have it apart installing the intake, you might look at the MAF sensor and make sure there isn't anything weird going on visually. But the new tune with the PRL intake will be MAP based, so the MAF really becomes just an intake temp sensor. Still look at it though to visually inspect it.

Let me know the time frame on installing the PRL intake, that way I can get a file together to get you started.

[tbangash]

Hey EFICU,

I can install the short ram as early as first thing in the morning. It only takes 5 minutes and is sitting in my trunk.

I took my obd scan tool and reset my throttle body. I also inspected the maf sensor, looks okay, I cleaned it with maf cleaner spray.

Looking forward to sending tuning the intake with you. Will wait for a basemap from you.

Thanks again for your help.

[tbangash]

Hey EFICU,

I think I may have found the issue after doing some research online. I had left the breather cone vent on the crankcase on after taking the intake off and had not connected the oem intake tubes from the breather to to the intake. Doing some research online, I found out this could cause unmetered air to enter and cause lean conditions.

Quoted from si forum:
"If you install breather filters, you will be allowing unmetered air to enter the system which will cause a more lean condition particularly when the ECM switches to open loop."

[EFICU]

I went ahead and put together the first calibration for you to run the PRL intake. For the datalogs again, shoot for 20 minutes in length and throw in one WOT pull in third gear from 2500-7500. For this first one, be sure to keep the driving normal and calm so we can get some data to see how it's all acting. Since you cleaned everything with the proper equipment we should be fine, but I like to get some data before you get too aggressive with the driving. This one will be on the 0* cam angle with vtec at 4600. The 0* cam is the least powerful, so don't get discouraged if it doesn't feel really powerful. It provides us a good base to build on for moving forward. I'll be watching the knock in every datalog, so don't stress if you see some. 9th gens have a couple areas that are prone to knock, so we will address those areas as we go.

tbangash.SD.Rev01 (Blended)(Vtec4600).fpcal

[tbangash]

Awesome thank you. It's 9 40pm and I gotta wake up for work at 5am but I am so excited, I am going to do this right now!