Misfire 3rd gear 2k rpms WOT

Sep 21, 2021
23
2
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I have been trying to do logs for my tuner at 2k rpms in 3rd gear and when I go WOT at 2k rpms it misfires/stutters until about 3000-3500k RPMS and then comes back to life. Sometimes, it will also stutter/mis in the same pull at 6k to 7k rpms. If I ease into the pull at 2k rpms it will not mis/stutter. Injectors were just replaced. Got a code for cylinder 5 misfire and both o2’s yet I just replaced both o2’s with Bosch OEM 17098. Runs great but when I mash the gas at low rpms it has its hiccups. Possible vac leak? Not sure I need some help. Car is single turbo with a Garrett gtw3884r.
 

doublespaces

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Oct 18, 2016
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I have been trying to do logs for my tuner at 2k rpms in 3rd gear and when I go WOT at 2k rpms it misfires/stutters until about 3000-3500k RPMS and then comes back to life. Sometimes, it will also stutter/mis in the same pull at 6k to 7k rpms. If I ease into the pull at 2k rpms it will not mis/stutter. Injectors were just replaced. Got a code for cylinder 5 misfire and both o2’s yet I just replaced both o2’s with Bosch OEM 17098. Runs great but when I mash the gas at low rpms it has its hiccups. Possible vac leak? Not sure I need some help. Car is single turbo with a Garrett gtw3884r.

How do your fuel pressures look? Upload a log to the Datalogs section and embed it for us to see

 
Sep 21, 2021
23
2
0
How do your fuel pressures look? Upload a log to the Datalogs section and embed it for us to see


Let me know if you get these logs. The 2nd pull I pulled off the road. Turned the car off and back on I believe. Throwing a cylinder 5 misfire and o2 codes. Just replaced injectors and swapped coil packs and spar plugs around also with a check of the gap size.
 

Attachments

  • 3rd gear pull #1.csv
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  • 3rd gear #2.csv
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doublespaces

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Oct 18, 2016
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I'm on a phone, can you upload them at the link I gave? You can copy the bb code it gives you and paste it back in a reply here so we can see it.
 

doublespaces

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Oct 18, 2016
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I just uploaded/ shared it with you. Sorry for the misunderstanding. New to this forum
No worries. Most people don't know you can upload straight from MHD either.

Here I got it for you:

 

doublespaces

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Oct 18, 2016
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Can see the rpm bumps there, looks like your fuel trims dive right then as well, PI kicking on?
 

doublespaces

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Oct 18, 2016
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I believe so. I went over wiring for the PI and everything looked good. Is there a good way to test pi to see if it is working?
Seeing your trims drop like that is the easiest probably. Not sure what your problem is, maybe someone else lse can chime in.
 
Sep 21, 2021
23
2
0
What wastegate setup are you running?
Previous owner said it was a tial but it’s not. It’s a cheap eBay wastegate later to find out. I keep throwing o2 codes literally seconds after I replace them. Won’t throw them right away but once I turn the car off and back on after the first drive of replacing them I get codes for them.