Misfire at cold start P0304 and P2261

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As an update. I did a smoke test and everything looked good. I proceeded to reflash rhe tune and let it reach full temp and it seemed to idle great.
@Jester04 mentioned its normal for the larger injectors to run a bit rough for a few seconds on a cold starts. Im finally ready to do some pulls.
 

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As an update. I did a smoke test and everything looked good. I proceeded to reflash rhe tune and let it reach full temp and it seemed to idle great.
@Jester04 mentioned its normal for the larger injectors to run a bit rough for a few seconds on a cold starts. Im finally ready to do some pulls.
And by rough is that you feel the idle on cold start. But it should go away in about 5-10 seconds.
 
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As an update. I did a smoke test and everything looked good. I proceeded to reflash rhe tune and let it reach full temp and it seemed to idle great.
@Jester04 mentioned its normal for the larger injectors to run a bit rough for a few seconds on a cold starts. Im finally ready to do some pulls.
I'm happy for you, hopefully your issue don't comeback. I'm reflash My tune too just in case and do the air pressure test today, if my problem don't go away I'll take it to the mechanic.. lol
 


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That's more likely normal, my rough idle last at least a minute to two
It really depends on the calibration you are running. No leaks first, then good injector calibration and the car should present no issues.

If it still persists it is worth sending the injectors to get checked out.
 
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It really depends on the calibration you are running. No leaks first, then good injector calibration and the car should present no issues.

If it still persists it is worth sending the injectors to get checked out.

I had put around 30 psi on intake system and no leaks mostlikely the injector is not working properly.

Quote: Injectors on the car are XDI new, the car had some Used Xdi before and had no issues. I'm think I do have some fail injectors. According to the tuner the fuel pump is working good.
 

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I had put around 30 psi on intake system and no leaks mostlikely the injector is not working properly.

Quote: Injectors on the car are XDI new, the car had some Used Xdi before and had no issues. I'm think I do have some fail injectors. According to the tuner the fuel pump is working good.
Well you can always take them out and send them for testing with XDI. Some people have issues some don’t.

Did you try reuploading the flash or clearing the codes?
 
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Well you can always take them out and send them for testing with XDI. Some people have issues some don’t.

Did you try reuploading the flash or clearing the codes?

Yes I cleared the codes 3 times.

I'll re-upload the tune again tonight.
 


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Yes I cleared the codes 3 times.

I'll re-upload the tune again tonight.

My issue is getting worst.. lol
I have 3 cylinder misfire now
I reflashed the tune but before that I uploaded the newest Hondata version 4.3.3.0. To my laptop. I did noticed My hondata firmware didn't upgrade still upload version 4.3.1.0. Hondata says there is no problem if firmware is not upgraded.

Quote there is no engine light On codes are seeing on the logs

Is there is anyway you can check my logs? If so let me know $$
 

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My issue is getting worst.. lol
I have 3 cylinder misfire now
I reflashed the tune but before that I uploaded the newest Hondata version 4.3.3.0. To my laptop. I did noticed My hondata firmware didn't upgrade still upload version 4.3.1.0. Hondata says there is no problem if firmware is not upgraded.

Quote there is no engine light On codes are seeing on the logs

Is there is anyway you can check my logs? If so let me know $$
Yeah absolutely! Send me a PM and we will try to sort this out.
 
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Ok keep us updated

Thank you soo much, You were really Helpful I appreciated a lot. 🙏

The Misfire P0304 code has being fixed and the problem was the Injector. I never thought a New Injector Will fail. Car only had 7k miles and according to XDI, debris could had gone inside the injector causing it to stuck open. Luckily I had a used XDI Injector.

The code P2261 "Turbo bypass control valve mechanical fail" was disabled with Hondata

11th Gen Honda Civic Misfire at cold start P0304 and P2261 Screenshot_20240902_104253_Yahoo Mail


11th Gen Honda Civic Misfire at cold start P0304 and P2261 Screenshot_20240902_104612_Yahoo Mail
 

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Thank you soo much, You were really Helpful I appreciated a lot. 🙏

The Misfire P0304 code has being fixed and the problem was the Injector. I never thought a New Injector Will fail. Car only had 7k miles and according to XDI, debris could had gone inside the injector causing it to stuck open. Luckily I had a used XDI Injector.

The code P2261 "Turbo bypass control valve mechanical fail" was disabled with Hondata

Screenshot_20240902_104253_Yahoo Mail.jpg


Screenshot_20240902_104612_Yahoo Mail.jpg
Happy to help!
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