Overboost Help

Iwantm3 · 03-27-2011, 10:31 PM

At high boost getting an overboost, car hesitates until it goes into limp mode , I'm pretty sure it's a vacuum leak, checked both bov and stock diverter valves looks OK to me, but happens with both sometime after 11 psi , is there anyway to do a vacuum leak test in the shop ? besides just looking at the hoses ? Maybe it's my wastegate actuators ? How can I check ? This drives me fucking crazy !!!!!

possible335i2008 · 03-27-2011, 10:41 PM

Did you check your intercooler piping? Especially at the c clips look for any oil

Iwantm3 · 03-27-2011, 11:22 PM

Quote:

Originally Posted by possible335i2008

Did you check your intercooler piping? Especially at the c clips look for any oil

there was oil on my charge pipe inside of the throttle body connector where the c clip goes on top ,

Iwantm3 · 03-27-2011, 11:29 PM

could it be the o ring is lose already ?

Iwantm3 · 03-28-2011, 12:11 AM

need help !!!

Overboost · 03-28-2011, 07:50 AM

Thought u were asking for my help

But I would think overboosts would have something to do with wastegate actuation. See if u can check the hoses going to the actuators. Don't quote me on this but if one of the hoses are off or leaking then the actuator may keep the wastegate closed.

Iwantm3 · 03-28-2011, 07:51 AM

Quote:

Originally Posted by Overboost

Thought u were asking for my help

But I would think overboosts would have something to do with wastegate actuation. See if u can check the hoses going to the actuators. Don't quote me on this but if one of the hoses are off or leaking then the actuator may keep the wastegate closed.

where are those ?

MKE_M3 · 03-28-2011, 07:52 AM

Quote:

Originally Posted by Overboost

Thought u were asking for my help

Very funny!

enrita · 03-28-2011, 07:55 AM

Quote:

Originally Posted by Iwantm3

where are those ?

check all the small hoses from the 2 canister of the boost control . those are located on passenger side . is basically where you attach the AR oil catch can.

possible335i2008 · 03-28-2011, 08:01 AM

I mean check the fmic connections...that's what used to cause my issues

Irishace · 03-28-2011, 08:39 AM

Cold side FMIC connector was my issue as well when I had overboost codes.

03-27-2011, 10:31 PM	#1
Iwantm3 Banned 34 Rep 1,284 Posts Drives: 335i M sport Join Date: Mar 2009 Location: US AND A I likeeeee iTrader: (1)	Overboost Help At high boost getting an overboost, car hesitates until it goes into limp mode , I'm pretty sure it's a vacuum leak, checked both bov and stock diverter valves looks OK to me, but happens with both sometime after 11 psi , is there anyway to do a vacuum leak test in the shop ? besides just looking at the hoses ? Maybe it's my wastegate actuators ? How can I check ? This drives me fucking crazy !!!!!
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03-27-2011, 10:41 PM	#2
possible335i2008 Major 167 Rep 1,222 Posts Drives: 335i Join Date: Mar 2008 Location: united states iTrader: (10)	Did you check your intercooler piping? Especially at the c clips look for any oil
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03-27-2011, 11:29 PM	#4
Iwantm3 Banned 34 Rep 1,284 Posts Drives: 335i M sport Join Date: Mar 2009 Location: US AND A I likeeeee iTrader: (1)	could it be the o ring is lose already ?
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03-28-2011, 12:11 AM	#5
Iwantm3 Banned 34 Rep 1,284 Posts Drives: 335i M sport Join Date: Mar 2009 Location: US AND A I likeeeee iTrader: (1)	need help !!!
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03-28-2011, 07:50 AM	#6
Overboost Second Lieutenant 14 Rep 284 Posts Drives: Monaco Blue 335i Join Date: Mar 2010 Location: Kentucky iTrader: (0)	Thought u were asking for my help But I would think overboosts would have something to do with wastegate actuation. See if u can check the hoses going to the actuators. Don't quote me on this but if one of the hoses are off or leaking then the actuator may keep the wastegate closed. __________________ PROCEDE V5, AR CATLESS DP's, HELIX FMIC, ER CHARGE PIPE AND TIAL BOV, OHLINS ROAD AND TRACK COILOVERS, INJEN INTAKE, AWD TURBO UPGRADE, VISHNU PWM METHANOL INJECTION, AMS CATBACK EXHAUST, M3 FRONT SUSPENSION COMPONENTS,VOLK RE30 19X9F 19X10R W/ YOKOHAMA ADVAN AD08 265/275
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03-28-2011, 08:01 AM	#10
possible335i2008 Major 167 Rep 1,222 Posts Drives: 335i Join Date: Mar 2008 Location: united states iTrader: (10)	I mean check the fmic connections...that's what used to cause my issues
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03-28-2011, 08:39 AM	#11
Irishace ElevenPointFive 327 Rep 2,450 Posts Drives: E90 335 Join Date: Oct 2009 Location: Toronto iTrader: (1)	Cold side FMIC connector was my issue as well when I had overboost codes. __________________ 2008 E90 335xi - N54 Daily Driver MHD Stage 2+ ~ CPE DPs ~ BMS Intake ~ AMS FMIC
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