2007 335i no boost, no CEL.

Kangarooski · 12-29-2014, 11:55 AM

Not sure if this is the right place or not, so sorry if it's not.

I have a 2007 335i. I installed a jb4 several months ago and everything was great. There was one time when making a pull that the half engine light came on but everything still ran fine. After that the light went away and it wouldn't make full boost.

I pulled the jb4 as I am thinking about selling the car. So now it is obvious there is no boost at all and no CEL or codes come up. I'm a bit new to the 335 world so I'm not sure what to be looking for.

Any help is much appreciated.

egregor · 12-31-2014, 12:20 PM

FWIW i had a very similar issue.. CEL one time when WOT in 4th.. but generally no light, and no/low boost. Poked around a bit, found bad vacuum lines to be the culprit. I spent a day replacing all of them, problem solved. If you haven't replaced them yet I'd at least inspect, and if you're higher mileage, definitely replace them as a first step.. it's a super cheap fix.

djkevinnn · 12-31-2014, 12:29 PM

I would check all of your pipes from the intercooler to the CP to the throttle body. Afterwards, I'd look at all the vacuum lines.

Kangarooski · 12-31-2014, 03:23 PM

cool, thanks for the responses, The charge pipes seem to look fine as that's what I initially though, I will have to look further into the vacuum lines, the visible ones are fine but need to look at the rest of them.

I just wanted to make sure there wasn't something obvious I was missing. I miss boost.

Kangarooski · 01-05-2015, 11:07 PM

Just ordered some replacement hoses as nobody in town had the correct size, keeping my fingers crossed.

Should I have any concern of turbo failure or anything? Pretty sure I am just worrying myself at this point.

mrtt · 01-06-2015, 01:18 AM

Quote:

Originally Posted by Kangarooski

Just ordered some replacement hoses as nobody in town had the correct size, keeping my fingers crossed.

Should I have any concern of turbo failure or anything? Pretty sure I am just worrying myself at this point.

Don't worry, take one step at a time, check/replace your vacuum lines first since they cost the least.

Vizina560 · 01-08-2015, 12:23 PM

This thread helped me with the exact same issue: http://www.e90post.com/forums/showthread.php?t=546560

Kangarooski · 01-08-2015, 05:31 PM

Yeah, I had read through that before.

I ordered and replaced all the hose, one to rear wastegate looked damaged but not sure if that happened during removal or not.

Anyways, went for a run and the car has plenty of power, unfortunately its plenty of N/A power. No action from the turbo whatsoever. Still no CEL as well.

Whats next?

12-29-2014, 11:55 AM	#1
Kangarooski Private First Class 4 Rep 122 Posts Drives: 07 335i Join Date: Dec 2013 Location: Chicago iTrader: (3)	2007 335i no boost, no CEL. Not sure if this is the right place or not, so sorry if it's not. I have a 2007 335i. I installed a jb4 several months ago and everything was great. There was one time when making a pull that the half engine light came on but everything still ran fine. After that the light went away and it wouldn't make full boost. I pulled the jb4 as I am thinking about selling the car. So now it is obvious there is no boost at all and no CEL or codes come up. I'm a bit new to the 335 world so I'm not sure what to be looking for. Any help is much appreciated.
	Appreciate 0 Tweet Quote

12-31-2014, 12:20 PM	#2
egregor Private 5 Rep 67 Posts Drives: 2007 335i sedan Join Date: May 2012 Location: United States iTrader: (0)	FWIW i had a very similar issue.. CEL one time when WOT in 4th.. but generally no light, and no/low boost. Poked around a bit, found bad vacuum lines to be the culprit. I spent a day replacing all of them, problem solved. If you haven't replaced them yet I'd at least inspect, and if you're higher mileage, definitely replace them as a first step.. it's a super cheap fix.
	Appreciate 0 Quote

12-31-2014, 12:29 PM	#3
djkevinnn Lieutenant 75 Rep 407 Posts Drives: 2008 335i FBO Join Date: Oct 2012 Location: Queens, NY iTrader: (2)	I would check all of your pipes from the intercooler to the CP to the throttle body. Afterwards, I'd look at all the vacuum lines. __________________ e90 jet black on terra//pure stage 2//fuel-it stage 3 lpfp & pi w. return//motiv tuned//vrsf dps//vtt inlets & outlets//helix fmic // er w. hks bov // bms dcis // spec stage 3+ w. mfactory smfw // cdv delete // clutch stopper // kw v1 // m3 control arms // whiteline fsb // cic\|combox\|backup camera retrofit // m3 headliner retrofit
	Appreciate 0 Quote

12-31-2014, 03:23 PM	#4
Kangarooski Private First Class 4 Rep 122 Posts Drives: 07 335i Join Date: Dec 2013 Location: Chicago iTrader: (3)	cool, thanks for the responses, The charge pipes seem to look fine as that's what I initially though, I will have to look further into the vacuum lines, the visible ones are fine but need to look at the rest of them. I just wanted to make sure there wasn't something obvious I was missing. I miss boost.
	Appreciate 0 Quote

01-05-2015, 11:07 PM	#5
Kangarooski Private First Class 4 Rep 122 Posts Drives: 07 335i Join Date: Dec 2013 Location: Chicago iTrader: (3)	Just ordered some replacement hoses as nobody in town had the correct size, keeping my fingers crossed. Should I have any concern of turbo failure or anything? Pretty sure I am just worrying myself at this point.
	Appreciate 0 Quote

01-08-2015, 12:23 PM	#7
Vizina560 TheVizness 0 Rep 19 Posts Drives: 15 328ix M-Sport Join Date: Jan 2013 Location: Richmond, VA iTrader: (0) Garage List 2008 BMW 335xi [0.00]	This thread helped me with the exact same issue: http://www.e90post.com/forums/showthread.php?t=546560
	Appreciate 0 Quote

01-08-2015, 05:31 PM	#8
Kangarooski Private First Class 4 Rep 122 Posts Drives: 07 335i Join Date: Dec 2013 Location: Chicago iTrader: (3)	Yeah, I had read through that before. I ordered and replaced all the hose, one to rear wastegate looked damaged but not sure if that happened during removal or not. Anyways, went for a run and the car has plenty of power, unfortunately its plenty of N/A power. No action from the turbo whatsoever. Still no CEL as well. Whats next?
	Appreciate 0 Quote