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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Mechanical Maintenance: Break-in / Oil & Fluids / Servicing / Warranty > STILL misfiring!! HELP!! *UPDATE*



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      09-18-2021, 12:48 AM   #1
PhillyPhilly
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STILL misfiring!! HELP!! *UPDATE*

What’s up guys!? So… I swapped the injectors with Index 12’s, NGK plugs and Eldor Coils. Car drove much better but still had a misfire under WOT. Just did DCI, DP/Race exhaust and before I tune with MHD I NEED to fix this! What do I do!? Injectors were coded and plugs were gapped.

Was thinking of buying one step colder plugs an making sure they are gapped properly? My other last options were a walnut blast, Vanos clean or replaced or just making a claim with my third party warranty for a new DMI.

Lastly… NO CODES for misfires or fuel related issues! Just a misfire when I WOT like a said before.

What should I do!??

*Update 10/6 with Video

Ok so I uploaded MHD stage 2+ and put in the colder plugs! Still stuttering and it’s not a misfire as I thought I’m losing power somewhere when I WOT. LPFP? I’m getting the fuel pump plausibility code but that’s normal from the added power. Video link below.

https://vimeo.com/624987569?utm_sour...campaign=29220

Last edited by PhillyPhilly; 10-06-2021 at 08:52 PM..
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      09-18-2021, 09:11 AM   #2
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Anybody?
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      09-18-2021, 01:50 PM   #3
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Try reposting in the general section along with the year, model and engine. From your post, I can't tell whether you're talking about an N55 or N54.
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      09-18-2021, 02:01 PM   #4
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just watch more porn and forget about it bud
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      09-18-2021, 02:53 PM   #5
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Don’t WOT…are all connections torqued to spec, vacuum hoses old and brittle causing lean codes? Are you tuned? Only tuned cars require colder plugs or you’re wasting your money installing them.
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      09-18-2021, 03:06 PM   #6
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Quote:
Originally Posted by e91Owner View Post
Try reposting in the general section along with the year, model and engine. From your post, I can't tell whether you're talking about an N55 or N54.
Thanks… N54
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      09-18-2021, 03:08 PM   #7
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just watch more porn and forget about it bud
Custom pornhub apparel always on sale on my Poshmark/Etsy. 10% just for you… bud
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      09-18-2021, 03:09 PM   #8
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i`ll give you your first like - meet me at the bike sheds and we can negotiate a reach around
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      09-18-2021, 03:11 PM   #9
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Quote:
Originally Posted by tcphoto View Post
Don’t WOT…are all connections torqued to spec, vacuum hoses old and brittle causing lean codes? Are you tuned? Only tuned cars require colder plugs or you’re wasting your money installing them.
But I’m not throwing ANY codes is what I’m saying. Injectors/plugs and coils all switched out and I’m still getting that hiccup when I step on it hard. No lights, no warnings no limp mode… nothing.

I just installed my catless downpipes/race exhaust and my MHD wireless adapter just arrived so I’m planning on a stage 2+ upload. I already ordered the colder plugs so I’m gonna try them out and gap them at .22 to see if it takes it away.
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      09-18-2021, 04:59 PM   #10
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Originally Posted by Chapperss View Post
i`ll give you your first like - meet me at the bike sheds and we can negotiate a reach around
Hahaha… my man! Thanks!
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      09-25-2021, 12:12 PM   #11
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Did you fix the misfire?
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      10-06-2021, 08:32 PM   #12
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Did you fix the misfire?
No 😫 I’m about to post a video to try and get to the bottom of this! Uploaded the stage 2+ tune and put in colder plugs. It’s not a misfire actually and I’m leaning towards LPFP?
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      10-06-2021, 08:41 PM   #13
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https://vimeo.com/624987569?utm_sour...campaign=29220

Last edited by PhillyPhilly; 10-06-2021 at 08:51 PM..
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