What causes a MAF to blow??

BKBMW335I · 06-07-2018, 01:46 PM

My MAF Blew so I ordered a new one, 4 days later that one blew too.

Is my Air flow too rich/,too lean??

What causes these things to go out besides old age/regular use??

I'm about to order a new one, I can't do logs because my AP3 is busted.

Help please!!

PS: My 2nd gear is slipping, has a long/high stall as though it doesn't want to shift, I have to let up off the accelerator.

I bought a new trans valve module, what else do I need (please don't say new trans), all other gears work fine, only 2nd is jacked.

Thanks in advance.

SnapCoupe · 06-07-2018, 04:26 PM

What do you mean by "blew"? Typically BMW MAFs are pretty robust and while people always suggest replacing them when they throw a code, most of the time they can be cleaned to extend their life a little. Was the new MAF you replaced it with an OEM part or was it aftermarket? From what I have experienced, typically these cars do not do well with an aftermarket MAF and they will throw codes.

BKBMW335I · 06-08-2018, 08:43 AM

Quote:

Originally Posted by SnapCoupe

What do you mean by "blew"? Typically BMW MAFs are pretty robust and while people always suggest replacing them when they throw a code, most of the time they can be cleaned to extend their life a little. Was the new MAF you replaced it with an OEM part or was it aftermarket? From what I have experienced, typically these cars do not do well with an aftermarket MAF and they will throw codes.

Well what I meant was basically not working. Yes, it was cleaned (the old one) but that didn't work, so I ordered a new one (original_stock) and it worked for a couple days then went out too.

Thanks for responding.

weehe126 · 06-08-2018, 01:11 PM

How did you determine it is not working?

SnapCoupe · 06-08-2018, 04:05 PM

Quote:

Originally Posted by BKBMW335I

Well what I meant was basically not working. Yes, it was cleaned (the old one) but that didn't work, so I ordered a new one (original_stock) and it worked for a couple days then went out too.

Thanks for responding.

The new one could have been a dud? Typically MAFs get gunked up by oil from aftermarket filters/intakes, so that could've been the cause for the first one going out.

06-07-2018, 01:46 PM	#1
BKBMW335I Captain 157 Rep 772 Posts Drives: '11 E93 335I Join Date: Aug 2015 Location: Land of OZ, Kansas iTrader: (0)	What causes a MAF to blow?? My MAF Blew so I ordered a new one, 4 days later that one blew too. Is my Air flow too rich/,too lean?? What causes these things to go out besides old age/regular use?? I'm about to order a new one, I can't do logs because my AP3 is busted. Help please!! PS: My 2nd gear is slipping, has a long/high stall as though it doesn't want to shift, I have to let up off the accelerator. I bought a new trans valve module, what else do I need (please don't say new trans), all other gears work fine, only 2nd is jacked. Thanks in advance. __________________ Mods: MHD Stg 2, xHP Flashtool Stage 3, VRSF 3" Chargepipe, Megan 4" Downpipes, Pure N55 Inlet, Outlet, VSRF 5" Stepped Intercooler, GFB Diverter, BMS N55 Intake, Michelin Pilot Super Sport Tires, BMS Sport Oil Cooler Valve, CF Spoiler, CF Kidney Grille, CF Mirror Covers, CF Eyelids, CF Wheel Hub Covers, CF Diffuser, M Sport Racing Strip, 20% Tints, and Golf Tee Mod
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06-07-2018, 04:26 PM	#2
SnapCoupe BMW Portland 224 Rep 524 Posts Drives: Z4M Coupe/E90 335i Join Date: May 2015 Location: Portland, OR iTrader: (0)	What do you mean by "blew"? Typically BMW MAFs are pretty robust and while people always suggest replacing them when they throw a code, most of the time they can be cleaned to extend their life a little. Was the new MAF you replaced it with an OEM part or was it aftermarket? From what I have experienced, typically these cars do not do well with an aftermarket MAF and they will throw codes. __________________ 2011 335i N55/6MT/M-Sport MHD Stage 2+, VRSF Downpipe, VRSF 7" FMIC, BMS Intake, BMS Chargepipe, Performance Exhaust Mod, F10 550i Clutch, BMS CDV, BMW Performance SSK, M3 Control Arms, ST Coilovers, Apex ARC-8 wheels, Michelin PS4S
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06-08-2018, 01:11 PM	#4
weehe126 Brigadier General 1161 Rep 3,189 Posts Drives: 2017 340i Join Date: Apr 2014 Location: San Antonio iTrader: (2)	How did you determine it is not working?
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