MAFS sensor leak

RaymondNguyen · 12-22-2010, 10:54 AM

i think my MAFS sensor leak because i crack the O Ring on MAFS sensor last time i install the charge pipe(bov)..but my engine light not on...my question is if my MAFS sensor leak the engine light will be on or off?...and i have the boost gauge and my vacuum before is -20 and after i install the charge pipe(bov) it's still -20 ...it's mean i have no boost leak?

Penn999 · 12-22-2010, 11:00 AM

Quote:

Originally Posted by RaymondNguyen

i think my MAFS sensor leak because i crack the O Ring on MAFS sensor last time i install the charge pipe(bov)..but my engine light not on...my question is if my MAFS sensor leak the engine light will be on or off?...and i have the boost gauge and my vacuum before is -20 and after i install the charge pipe(bov) it's still -20 ...it's mean i have no boost leak?

335 doesnt use a maf, they use a map sensor. Do some researching and find out how that relates to you rproblem. If it is damaged it should throw a code, do you have a boost gauge? what chargepipe?

M3 Eater · 12-22-2010, 11:16 AM

if vac is 20 and you have not light... there shouldn't be a significant leak. You can grab some o rings at any auto store or hardware store. Replace that o ring for a peice of mind. I also replaced the o ring that connects aftermarket pipe to the throttle body. A BMW oil change kit o ring is the same size as the charge pipe o ring.

RaymondNguyen · 12-22-2010, 03:07 PM

Quote:

Originally Posted by Penn999

335 doesnt use a maf, they use a map sensor. Do some researching and find out how that relates to you rproblem. If it is damaged it should throw a code, do you have a boost gauge? what chargepipe?

yes i have boost gauge and synapse charge pipe

RaymondNguyen · 12-22-2010, 03:08 PM

Quote:

Originally Posted by M3 Eater

if vac is 20 and you have not light... there shouldn't be a significant leak. You can grab some o rings at any auto store or hardware store. Replace that o ring for a peice of mind. I also replaced the o ring that connects aftermarket pipe to the throttle body. A BMW oil change kit o ring is the same size as the charge pipe o ring.

ok let me try going to pepboy or autozone tonight thx

12-22-2010, 10:54 AM	#1
RaymondNguyen Private First Class 6 Rep 100 Posts Drives: 335xi 2008 Join Date: May 2010 Location: philadelphia iTrader: (6)	MAFS sensor leak i think my MAFS sensor leak because i crack the O Ring on MAFS sensor last time i install the charge pipe(bov)..but my engine light not on...my question is if my MAFS sensor leak the engine light will be on or off?...and i have the boost gauge and my vacuum before is -20 and after i install the charge pipe(bov) it's still -20 ...it's mean i have no boost leak?
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12-22-2010, 11:16 AM	#3
M3 Eater Major 36 Rep 1,054 Posts Drives: 335i Sedan Join Date: May 2010 Location: Unknown iTrader: (3) Garage List 2007 335i [0.00]	if vac is 20 and you have not light... there shouldn't be a significant leak. You can grab some o rings at any auto store or hardware store. Replace that o ring for a peice of mind. I also replaced the o ring that connects aftermarket pipe to the throttle body. A BMW oil change kit o ring is the same size as the charge pipe o ring. __________________ JB4 beta 15 ohms FSB,AEM inline filter/ CM 10, ETS fmic, ER custom made charge pipe,TSW Donnington 18's,Simitumo HTRZ3, Injen DCI, AR DPs, Forge DVs, AA SLD, Koni FSD, ZSP springs.
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