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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > Wastegate problems?



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      11-24-2011, 08:53 PM   #23
stevem17500
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Originally Posted by shockin330i View Post
Yeah. Its just a bitch having to take off the downpipe and procede everytime this thing goes into limp mode.
Is it limp mode or no boost....does feel like u floor the car and u hear like a cliking noise coming from engine bay kinda like its power is being cut off...do u hear anything......during fhe full throttle
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      11-25-2011, 12:28 AM   #24
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its a half engine light and little to no boost. I floor it and even dodge caravan's pass me..
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      11-25-2011, 02:10 AM   #25
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T[quote=shockin330i;10866339]its a half engine light and little to no boost. I floor it and even dodge caravan's pass me.. [/QU
Try to turn of ur procede and see what codes pop up.....also I told u I to had a throtlle
Body code stating that it was remaining closed.... n 55 have a throttle body issue. Maybe....I reset the system and took of charge pipe cleaned inside of throttle bidy...put it back on lowered the boost it was ok......theme added some octane booster and raised the boost to 14 pounds holding no problems twinning get a check engine light every now and then but I just reset it
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      11-25-2011, 02:21 AM   #26
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I'll try that this week. I think the tb is only some 200 bucks. I might order one just in case see what happens.
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      11-25-2011, 06:15 PM   #27
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I'll try that this week. I think the tb is only some 200 bucks. I might order one just in case see what happens.
What exact codes do you have now? Is there still boost faults WITH the throttle valve faults?

Technicians commonly MIS-diagnose throttle valve replacements on N55s. Because when there is a vacuum leak, or boost fault, it usually sets a throttle valve fault with it. Most people assume there is an issue with the throttle valve which there is not. The throttle valve fault is there because it is seeing a different mass air flow rate most likely because of a leak. I wouldnt go and spend any money on a Throttle Valve just yet, its most likely not your problem.
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      11-25-2011, 10:23 PM   #28
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The codes i was getting were dealing with the throttle body, saying that it was in a sense stuck. They replaced a sensor on the charge pipe and then the boost solenoid.
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      11-27-2011, 02:07 PM   #29
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The codes i was getting were dealing with the throttle body, saying that it was in a sense stuck. They replaced a sensor on the charge pipe and then the boost solenoid.
Im assuming you had a sluggish movement fault for the Throttle valve originally?

What exact codes do you have now when it came back on?
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