Misfire Cylinder 1 & 3

[Luv_alan]

OP, maybe try a run at say E30 blend & see how things look

Not a bad idea. Maybe the coil packs aren’t able to burn the E50.. currently in a full tank right know so it’ll be a little while until that.

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[Luv_alan]

15-20 minutes of driving with a pull mixed in.

I will do this today boss, thanks for your time

 

[Luv_alan]

15-20 minutes of driving with a pull mixed in.

15-20 minutes of driving with a pull mixed in.

Sorry got busy today, here's a log. I got home and while I was pulling the log after the drive it gave the code for Cylinder 3.
I did a compression test (thought spark plug) and it was good compared to cylinder 4

https://www.mediafire.com/file/k1i91bbpivibblm/Datalog.kdlg/file

 

[gtman]

So this isn't a diagnosis but some observations. At this point ask your tuner what they think based on a couple things I'm noticing.

1. You're consistently overshooting your WOT boost targets by 2-3 psi.

2, Your short term trims are fluctuating a bit more than I'd like to see.

3. You appear to have an issue where long term trims aren't being calculated.

4, This is a big one for me. While knock counts generally aren't a concern, I did see a real oddity on your log. At about the 1:20 mark you're just idling and knock count rises by nearly 100 over the next 30+ seconds at idle.

 

[Luv_alan]

15-20 minutes of driving with a pull mixed in.

Not sure why I'm unable to upload the log here, I attached it to

https://www.mediafire.com/file/k1i91bbpivibblm/Datalog.kdlg/file

So this isn't a diagnosis but some observations. At this point ask your tuner what they think based on a couple things I'm noticing.

1. You're consistently overshooting your WOT boost targets by 2-3 psi.

2, Your short term trims are fluctuating a bit more than I'd like to see.

3. You appear to have an issue where long term trims aren't being calculated.

4, This is a big one for me. While knock counts generally aren't a concern, I did see a real oddity on your log. At about the 1:20 mark you're just idling and knock count rises by nearly 100 over the next 30+ seconds at idle.

Honestly man I’m very frustrated, I can’t seem to find the issue but something clearly is not working properly. I’ve sent him an email last night, let’s see what he replies. I really appreciate you taking a look at the log, hopefully I can resolve this soon..

 

[gtman]

Think about adding your car to my community tuning thread.

As far as uploading logs directly into a post, just put your .kdlg file into a .zip and you're golden.

Side note: Why didn't you go with D-Rob or John Vega?

 

[Luv_alan]

Think about adding your car to my community tuning thread.

As far as uploading logs directly into a post, just put your .kdlg file into a .zip and you're golden.

Side note: Why didn't you go with D-Rob or John Vega?

ill definitely add it brother, I just need to take the time to input all the info I’ll get to it today after work
Sounds good I’ll zip file it next time!
Not sure man, I’ve heard that Drob is kind of a prick, and John Vega was significantly more expensive. Around $700-800 for the tune. I found Rev It Up Through the forums so I decided to give a shot

 

[gtman]

I've had a lot of personal interaction with John Vega and IMO not only is he a class act, no one creates a smoother tune. And honestly the few times I've interacted with Derek, he's been great.

JV's price should have been $449 based on his current etune page:
https://www.phearable.net/tuning-software/etune.html

 

[khimaniz]

So this isn't a diagnosis but some observations. At this point ask your tuner what they think based on a couple things I'm noticing.

1. You're consistently overshooting your WOT boost targets by 2-3 psi.

2, Your short term trims are fluctuating a bit more than I'd like to see.

3. You appear to have an issue where long term trims aren't being calculated.

4, This is a big one for me. While knock counts generally aren't a concern, I did see a real oddity on your log. At about the 1:20 mark you're just idling and knock count rises by nearly 100 over the next 30+ seconds at idle.

#4 here was similar for my issue along with fuel trims in the 20's too. Coolant wasn't decreasing at all and compression tests were all good. I also tried the coilovers switch and replaced the spark plugs. In the end we replaced the injectors all issues were gone. I also ran Amsoil p.i. and BG 44K just before changing the injectors.

I'm on a stock FK7 with TSP stage 1 and 77k kms running 91 from either Costco, Shell or Esso.

The codes I was getting was similar to yours too along with how random the misfires were but with them being more concentrated on one or two cylinders especially during idle, yet being almost unnoticeable during a drive.

Fuel trims are now nowhere below -5 and no more codes for over 3k kms.

 

[Luv_alan]

#4 here was similar for my issue along with fuel trims in the 20's too. Coolant wasn't decreasing at all and compression tests were all good. I also tried the coilovers switch and replaced the spark plugs. In the end we replaced the injectors all issues were gone. I also ran Amsoil p.i. and BG 44K just before changing the injectors.

I'm on a stock FK7 with TSP stage 1 and 77k kms running 91 from either Costco, Shell or Esso.

The codes I was getting was similar to yours too along with how random the misfires were but with them being more concentrated on one or two cylinders especially during idle, yet being almost unnoticeable during a drive.

Fuel trims are now nowhere below -5 and no more codes for over 3k kms.

This is a bit reliving to hear bro. I’ll bite the bullet and get new injectors. I’m sure you’re were of a batch being discontinued, and a new one being released . Do you know if I purchase form honda today or order I’ll get the “new” injectors

 

[Luv_alan]

I've had a lot of personal interaction with John Vega and IMO not only is he a class act, no one creates a smoother tune. And honestly the few times I've interacted with Derek, he's been great.

JV's price should have been $449 based on his current etune page:
https://www.phearable.net/tuning-software/etune.html

I’m not entirely sure man, it was a year ago when i started tuning, but I’ll definitely hit up John Vega if I get a different setup. I’ve also heard DRob is very conservative
John Piero has also been someone who id highly consider tuning, aka FK8 tund

 

[curlichfc1]

I’d stick with john v or Derek. Not trying to trick you my guy, at the end of the day your choice

 

[Sharpy]

I'm having issues similar to what khimaniz experienced. Pretty certain my issue is degraded injectors as I'm at 124k. My fuel trims are horrid at start up, same with misfires at idle when cold. And its definately cold here in Indiana. I just got my new set of revised injectors yesterday from the dealer after like a month of waiting. I'm hoping to swap them in sometime this weekend. Sounds like you have the same issue. Probably place an order asap as wait times seem unpredictable

 

[khimaniz]

This is a bit reliving to hear bro. I’ll bite the bullet and get new injectors. I’m sure you’re were of a batch being discontinued, and a new one being released . Do you know if I purchase form honda today or order I’ll get the “new” injectors

You'll definitely have to ensure you get the revamped ones as one of the dealers were trying to sell me the old ones. If what you need is the same as my FK7 then it's 06160-59B-305. Got it from Honda and told them I'm from [my mechanic shops name] so they gave me the wholesale price of $554.25 CAD taxes in.

 

[gtman]

You'll definitely have to ensure you get the revamped ones as one of the dealers were trying to sell me the old ones. If what you need is the same as my FK7 then it's 06160-59B-305.

I'm pretty sure his Si part # is 06160-5PA-305.

Although, with only 43K on the clock, I'm shocked his injectors might be shot.

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