|
|
|
|
|
|
BMW Garage | BMW Meets | Register | Today's Posts | Search |
|
BMW 3-Series (E90 E92) Forum
>
Misfire on Big turbo n54!
|
|
02-13-2024, 01:32 PM | #1 |
Registered
0
Rep 2
Posts |
Misfire on Big turbo n54!
To whom it regards,
This is my first post here and I’m hoping more knowledgeable people can help me with this problem. I have a 6870 single turbo n54 on e50 tuned to 26 psi on Mhd, with most parts you would normally buy to big turbo your car. After doing one or two logs, the car threw misfire codes on cylinder 1 and 2 along with some other codes. I’m hoping it’s just either a o2 sensor issue or maybe just a MOSFET issue in which I have a MSD81 dme for replacement. Not sure if anyone would need or be able to view this log that I took, but it’ll be awesome if I can get some advice. I have attached two screenshots because I am having trouble sending the actual log over via links. The two screenshots of the charts show cylinder 1 and 2 misfiring. Thank you |
02-13-2024, 02:52 PM | #2 |
Lieutenant Colonel
3335
Rep 1,913
Posts |
define '' with most parts you would normally buy''
what are the steps you did so far ? could be tons of issue, and of course the one you dont want to see is the DME. Normally DME issue come with aftermarket ignition coils, heat or water damage (cowl conversion). Can be sparkplug gap, if you're already around 0.020'' , try 0.018'' Can be ignition. Looking at the code, might be the fuel delivery. What LPFP you have. 26psi on a 68 is serious boost. also, I dont know why, I tend to see lately more post about HPFP failing. Are you running DI with PI? Post your log on datazap. Will be easier to check. Also, who did your map if you're full MHD ? He might help you. |
Appreciate
1
BigTurbo_4080.00 |
02-14-2024, 08:39 PM | #3 |
Registered
0
Rep 2
Posts |
What’s up man. This is my parts list. I kind of adopted a second hand project car but the car was well taken care of, was just sitting for about a year and a half.
2008 BMW 335i Automatic Doc Race Single Turbo Conversion 99,000 Miles Factory Options: Sport Package Sunroof 2 Key Fobs I-Drive MSD80 DME Engine: Index 12 Injectors warranty with FCPeuro Delphi Coils Bimmerlife R8 Coils with harness - in hand but not installed CSF Performance Aluminum Radiator VTT Dual Oil Catch Cans VTT Valve Cover ARM motorsport 5" intercooler Evolution of Speed 1st gen port injection manifold - not installed, no tune Port injection has not been installed, but I have everything to ready to setup including a split second controller Turbo System: Doc Race Kit Precision Turbo 6870 gen 2 Go Fast Bits Blow of Valve with Trumpet Exhaust: Dual straight exhaust dual resonators in hand but not installed Tune: MOTIV Motorsport Xhp Trans Tune Revshift Trans Mounts Fuel-It Dual Bucketless Fuel Pump with Hobbs Switch Wheels and Suspension: Megan Coilover Suspension New Firestone Firehawk Indy 500 Tires 19" Forgestar F14 wheels Zimmerman Slotted Brakes Extra Spare Parts: Carbon Fiber Hood - Original OEM hood on hand. DME wiring harness Refurbished HPFP MSD81 DME Miscellaneous new parts nots installed wheel bearings, trans guibo, motor mounts. |
Appreciate
0
|
02-15-2024, 03:07 AM | #4 | |
Robot
1860
Rep 2,316
Posts |
Quote:
Might sound dumb but you know with the bucketless pump you shouldn't run it under 1/4 tank right? Likely unrelated to your misfires, but you might want to consider upgrading that intercooler. From what I know that 5" IC is a bit undersized for your massive turbo with 26PSI. Everything else looks good. sounds like a nice project! Makes me want to upgrade. To upload the log use datazap.me and post the link here. Last edited by lowrydr310; 02-15-2024 at 03:15 AM.. |
|
Appreciate
0
|
Bookmarks |
|
|