P0301 Misfire on cylinder 1

[dallasjhawk]

Thanks for this, it seems thats why the "Honda tech line" advised my dealer to swap the injectors right away? Maybe this is a known problem that they know about and not us.

In any case, its been a few days now since that bad misfire happened and it's no longer happening anymore. Might have been an anomaly but the car is running fine for now.

Also, as I stated I always use shell 91 or chevron 91. Never anything else.

no problem! As soon as I saw this I thought of you and felt it was very pertinent to this thread. For a second I wondered if it was your car he was talking about then I reread and he was talking about a hatch

Sponsored

 

[Design]

It would be interesting to know if the tech saw the same thing on your injectors. If so, might be worth digging a bit more.

I'm inclined to rule out the tune as I don't think the OTS calibration affects AFRs or timing. But I'm curious if there's a possible link to the increased boost. (I just don't see how.)

 

[dc2turbo]

It would be interesting to know if the tech saw the same thing on your injectors. If so, might be worth digging a bit more.

I'm inclined to rule out the tune as I don't think the OTS calibration affects AFRs or timing. But I'm curious if there's a possible link to the increased boost. (I just don't see how.)

well its misfiring with the factory calibration too

 

[Syntek]

It would be interesting to know if the tech saw the same thing on your injectors. If so, might be worth digging a bit more.

I'm inclined to rule out the tune as I don't think the OTS calibration affects AFRs or timing. But I'm curious if there's a possible link to the increased boost. (I just don't see how.)

I should have asked about that. I wonder if they still have the injectors.

Regarding the tune, aren't Hondata tunes known to run rich to be on the safe side? I'm inclined to think that could contribute to the carbon build up so quickly even though I'm using high tier gas

 

[Design]

No I believe the AFRs are unchanged on the 1.5T, Si excluded.

 

[dallasjhawk]

I should have asked about that. I wonder if they still have the injectors.

Regarding the tune, aren't Hondata tunes known to run rich to be on the safe side? I'm inclined to think that could contribute to the carbon build up so quickly even though I'm using high tier gas

The factory tune runs the richest to be safe for all forms of driving. The off the shelf tune run a little more lean than the Hondas for power and performance, and the custom tunes are most likely the leanest for the most power. If this is a honda issue dealing with running rich, we will see it in far more factory cars than we will tuned cars

 

[Design]

I don't think the OTS 1.5T tune runs "lean," except on the Si. Could be mistaken but remember asking a while back. Here's Hondata's take on their approach:
http://www.civicx.com/threads/honda...-2016-civic-1-5t-turbo.4318/page-7#post-75111

 

[dallasjhawk]

I don't think the OTS 1.5T tune runs "lean," except on the Si. Could be mistaken but remember asking a while back. Here's Hondata's take on their approach:
http://www.civicx.com/threads/honda...-2016-civic-1-5t-turbo.4318/page-7#post-75111

so they dont lean it out slightly at WOT? I get why not at part throttle, it allows you to maintain your mpg which is like the #1 question most people ask outside of the warranty question.

 

[Syntek]

Well, I'm at a loss. If the injectors really did get clogged up even after using quality gas all the time (something I swear by and never skimp on regardless of price) and using the occasional fuel system cleaner, then this is honestly a major underlying issue that someone is going to be running into and it's going to be a huge pain in the ass to fix/replace without warranty. No matter what kind of fuel you put in, this will be the end result anyway. And even at 30,000 miles (or 38,000 like @dallasjhawk 's hatch post) I feel like thats far too young for a car to have carbon build up issues.

 

[Design]

We just don't know at this point. But please keep us posted if you find out anything else worth sharing. GL.

 

[Syntek]

Just a small update, ever since I reflashed my tune after that error, my car hasn't misfired or felt bad since then and is running normal, including the datalogs. I'm going to write this off as an anomaly and hope it doesn't come back again.

 

[coreyw2000]

I just threw the same engine code today. I'm going to call my dealer in the morning and get it in - headed on a long trip in a couple weeks and I need my wheels! Syntek, did you get any other errors or lights when you got your error? When my engine light came on I got errors for the brake system, power steering system, and all of my sensing features were apparently not functioning. I'm at 33000kms, which is about 20000 miles. Seems really weird to me that these unrelated systems were sending in errors. I drove the car on the highway for an hour and both the power steering and brake systems work, but my sensing features wouldn't activate. 1.5 '16 sedan.

 

[Syntek]

I just threw the same engine code today. I'm going to call my dealer in the morning and get it in - headed on a long trip in a couple weeks and I need my wheels! Syntek, did you get any other errors or lights when you got your error? When my engine light came on I got errors for the brake system, power steering system, and all of my sensing features were apparently not functioning. I'm at 33000kms, which is about 20000 miles. Seems really weird to me that these unrelated systems were sending in errors. I drove the car on the highway for an hour and both the power steering and brake systems work, but my sensing features wouldn't activate. 1.5 '16 sedan.

Yes, my parking hold, hills start, traction control, brake problem. Basically everything went off when my CEL came on. I'm wondering if it's a software error when a CEL comes on that everything else errors out too.

 

[coreyw2000]

That's what I kinda thought too. Seems like an odd oversight on Honda's part though... If I have an engine light on I don't need a bunch of notifications and disabled options

 

[dallasjhawk]

I just threw the same engine code today. I'm going to call my dealer in the morning and get it in - headed on a long trip in a couple weeks and I need my wheels! Syntek, did you get any other errors or lights when you got your error? When my engine light came on I got errors for the brake system, power steering system, and all of my sensing features were apparently not functioning. I'm at 33000kms, which is about 20000 miles. Seems really weird to me that these unrelated systems were sending in errors. I drove the car on the highway for an hour and both the power steering and brake systems work, but my sensing features wouldn't activate. 1.5 '16 sedan.

are you tuned or stock?

Sponsored