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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Cobb Sport Map Studdering Hard



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      06-11-2013, 10:54 PM   #1
AZBimmer
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Newbie here. When running sport map I get a bad Studdering and power loss when I put my foot in it. I am at 94 octane as I mixed Torco Accelerator with Arizona's 91. No codes and no issues in drive map. Would the DTC do this or is it another issue. Any suggestions appreciated. 09 e90 with 40,000 miles and plugs changed last week.
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      06-11-2013, 11:00 PM   #2
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Quote:
Originally Posted by AZBimmer View Post
Newbie here. When running sport map I get a bad Studdering and power loss when I put my foot in it. I am at 94 octane as I mixed Torco Accelerator with Arizona's 91. No codes and no issues in drive map. Would the DTC do this or is it another issue. Any suggestions appreciated. 09 e90 with 40,000 miles and plugs changed last week.
Your best bet is to contact our customer service so we can go through some data logging with you. There are a ton of things that can cause issues and we'll be able to determine the cause a lot better with some logs.

-Josh
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      06-11-2013, 11:01 PM   #3
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Missfire would be my guess but logs may help...
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      06-11-2013, 11:03 PM   #4
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Thanks. I will follow up tomorrow.
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      06-11-2013, 11:13 PM   #5
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Edit: reading fail on my part.
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      06-12-2013, 12:33 AM   #6
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I am running sport map (Cobb) on my 335i aswell using shell 91 Arizona piss gas, so far no issues. I had issues at the beginning though, i had my fuel injectors replaced, spark plugs and chemical treatment done, the car is running much better now. Did you check if there are any codes?
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      06-12-2013, 01:23 AM   #7
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No codes. I will run some logs and send to Cobb. It was originally pulling hard for about 3 days and then started shuddering during wot around 4k rpm's today. since my op I went wot in drive map and noticed slight shudder around 6k RPM. Just want to get fixed as I just received my cobb fmic and am ready to get installed.
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      06-12-2013, 08:13 AM   #8
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Are you still on original plugs? If so, this is most likely your issue.
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      06-12-2013, 10:18 AM   #9
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Same thing happened to me. Similar mileage and issues. It was my injectors. Unistall the Cobb AP and go to the dealer and get you warranty work done. Could be the coil packs as well but it's all under warranty. They replaced all six of my injectors and I didn't pay a cent.
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      06-12-2013, 10:25 AM   #10
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My warranty ended in Feb. as that was the end of the original 4 years. Plugs are new, just replaced last week. Probably looking at coils or injectors based on the responses.
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      06-12-2013, 10:50 AM   #11
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Quote:
Originally Posted by AZBimmer View Post
My warranty ended in Feb. as that was the end of the original 4 years. Plugs are new, just replaced last week. Probably looking at coils or injectors based on the responses.
Those would be the next two things to check if plugs are fine. However, I have had 3 or 4 bad coils since owning the car and each time it threw a Service Engine Soon Light and the misfire code was present.

EDIT: Sorry that I didn't see that you mentioned you replaced plugs last week.
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