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Rbimin Rbimin is offline
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Unhappy Help misfire - 09-13-2017, 08:36 AM

So I'm having an issue with a cylinder 2 misfire . It happens at half throttle between 2 and 3000 Rpms . It will go away if I idle for a min . If I wot it doesn't happen or if I baby it . I run a jb4 map 5 most of the time . And sometimes run e85 . It happens in all maps . Changed the plugs and did coil test alway 2 . Had the injectors upgraded/ changed under warranty 2 moths ago so idk
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Default 09-13-2017, 09:17 AM

This is going to be a hard problem to get tech support over the forums with.

It'd be nice to see a log of this happening, just to see if anything sticks out from there. At least it is a start.

Have you had a Walnut Shell Blasting service done recently?
Who changed your injectors?
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Default 09-13-2017, 09:41 AM

Have logs will post after work and bmw did my injectors under warranty
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Default 09-13-2017, 09:44 AM

No on the walnut blasting am going to oper her up this weekend to take a look
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Default 09-13-2017, 11:13 AM

Quote:
Originally Posted by Rbimin
No on the walnut blasting am going to oper her up this weekend to take a look
Definitely a good idea - if you have never had it done, just get everything you need and do it (or have someone do it).
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Default 09-13-2017, 03:54 PM

What parameters do you want to see on my graphed
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Default 09-13-2017, 03:56 PM

Just upload the entire csv file, I'm not really looking for something particular. Looking for signs.
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Default 09-14-2017, 09:17 AM

JB4 logs will have all the necessary data but misfires usually come down to good basic troubleshooting via hardware. Swapping components, verifying injectors are installed correctly (including decouplers), compression test on that cylinder....

If it's always cylinder 2, those are going to be the things you'll want to do.



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Default 09-14-2017, 09:21 AM

I've done all but th compression test which I was told was done when my car was getting the injectors installed what's throwing me is that it's half throttle only and the code resets itself minutes later
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Default 09-14-2017, 09:24 AM

And I'm having trouble uploading the diles
Attached Images
File Type: pdf PDF csv.pdf (7.9 KB, 7 views)
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Default 09-14-2017, 09:24 AM

Files
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Default 09-14-2017, 09:28 AM

I apologize but you will have to sort out the problem with uploading. Perhaps you need to revisit how you are collecting data. Maybe use the WOT trigger instead of just recording your entire driving session. We can view a big long file and pick through it but something more specific would be nice.
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Default 09-14-2017, 09:31 AM

I will do my best
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Default 09-14-2017, 09:33 AM

Can I ask what which my number 2 second one or fifth on
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Default 09-14-2017, 09:34 AM

I will do more pills this afternoon
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Default 09-14-2017, 09:36 AM

Pulls
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Default 09-14-2017, 09:40 AM

Are you asking which cylinder is #2? If so it's the second one back from the front of the car.



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Default 09-14-2017, 09:49 AM

Thought so
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