Cleaned HFAMM (MAF) and TMAP sensors

gclions · 03-02-2016, 03:16 PM

Guys,

Just wanted to drop this here. I've been having progressively worse stumbles at idle, and overall the car just didn't feel right. Figured it was time to clean my HFAMM (MAF) sensors. I used the CRC MAF and throttle body cleaner, as it came pretty well recommended on various forums. Cleaning was straight forward: unplug the MAF, remove two torx screws, remove MAF, spray liberally, reinstall MAF. Repeat on the other side.

It helped a lot, but I have a large aerosol can that I needed to put to use, so I cleaned the TMAP sensors on the front of the intercoolers as well. After that it was a noticeable difference. The way I drive fuel economy won't improve, but boy it feels refreshed. Getting the TMAP sensors out is kind of a pain, mainly because it's tight there at the bottom of the intercoolers. I removed the radiator supports/strut bars and the plastic air ducts that go to the front of the car. Same thing though, unplug them and remove the two torx screws to get each sensor out. Careful on the way out and in, to avoid damaging the o-ring. If that fails you'll have a boost leak on that side.

Hope this helps someone, it was easy to do. My intakes have been in and out so many times it's really easy to disassemble, but in any case you should be able to clean and reinstall all four sensors in under an hour.

- Grant

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Name: 7070079_crc_05110_pri_larg.jpg
Views: 1616
Size: 15.7 KB

Bmw doubles · 03-04-2016, 01:38 PM

I'm experiencing the same, a slight unstable idle at times. I know where the maf is don't know where the tmaps are.

gclions · 03-04-2016, 02:25 PM

TMAPs are on the front of each intercooler, for those with BMS Stage 1, it is where you connect the two connectors.

Bmw doubles · 03-04-2016, 02:29 PM

Quote:

Originally Posted by gclions

TMAPs are on the front of each intercooler, for those with BMS Stage 1, it is where you connect the two connectors.

I'll shall find and destroy, I mean clean.

belal242 · 03-16-2016, 10:10 AM

sounds like what I am dealing with. My car threw a fault code, apparently 2 of them were fried. I still have a slight shutter, so I'll check the other two sensors.

550Reasons · 03-16-2016, 10:24 AM

Im going to clean the sensors on the intakes when I replace them next week.

03-02-2016, 03:16 PM	#1
gclions Second Lieutenant 78 Rep 249 Posts Drives: 2011 550i Join Date: Feb 2014 Location: Chesapeake, VA iTrader: (0)	Cleaned HFAMM (MAF) and TMAP sensors Guys, Just wanted to drop this here. I've been having progressively worse stumbles at idle, and overall the car just didn't feel right. Figured it was time to clean my HFAMM (MAF) sensors. I used the CRC MAF and throttle body cleaner, as it came pretty well recommended on various forums. Cleaning was straight forward: unplug the MAF, remove two torx screws, remove MAF, spray liberally, reinstall MAF. Repeat on the other side. It helped a lot, but I have a large aerosol can that I needed to put to use, so I cleaned the TMAP sensors on the front of the intercoolers as well. After that it was a noticeable difference. The way I drive fuel economy won't improve, but boy it feels refreshed. Getting the TMAP sensors out is kind of a pain, mainly because it's tight there at the bottom of the intercoolers. I removed the radiator supports/strut bars and the plastic air ducts that go to the front of the car. Same thing though, unplug them and remove the two torx screws to get each sensor out. Careful on the way out and in, to avoid damaging the o-ring. If that fails you'll have a boost leak on that side. Hope this helps someone, it was easy to do. My intakes have been in and out so many times it's really easy to disassemble, but in any case you should be able to clean and reinstall all four sensors in under an hour. - Grant __________________ 2011 BMW 550 i / Sophisto Grey / BMS Stage 2
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03-04-2016, 01:38 PM	#2
Bmw doubles Dream crusher 984 Rep 2,421 Posts Drives: Fast Join Date: Mar 2015 Location: westside iTrader: (0) Garage List 2011 535 [0.00]	I'm experiencing the same, a slight unstable idle at times. I know where the maf is don't know where the tmaps are. __________________ 535i MIssion Performance, PS2, Helix HPFP Kit, Wagner FMIC, Spec 3 clutch, Steel SMF, Wolf Racing CP, UUC SSK, GFB dv, SprintBooster, Custom Dynomax Exhaust, M5 Sways, Eibach OE Springs, Koni Sports Adjustable, Custom Short Ram CAI IG: @bmwdoubles
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03-04-2016, 02:25 PM	#3
gclions Second Lieutenant 78 Rep 249 Posts Drives: 2011 550i Join Date: Feb 2014 Location: Chesapeake, VA iTrader: (0)	TMAPs are on the front of each intercooler, for those with BMS Stage 1, it is where you connect the two connectors.
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03-16-2016, 10:10 AM	#5
belal242 Lieutenant 32 Rep 479 Posts Drives: 11 F10 550xi Join Date: Jun 2009 Location: Northern VA iTrader: (2) Garage List 2011 550xi [0.00]	sounds like what I am dealing with. My car threw a fault code, apparently 2 of them were fried. I still have a slight shutter, so I'll check the other two sensors.
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03-16-2016, 10:24 AM	#6
550Reasons Captain 150 Rep 738 Posts Drives: F10 550i Join Date: Aug 2014 Location: South Florida iTrader: (1)	Im going to clean the sensors on the intakes when I replace them next week. __________________ 2011 550i 2013 M5 2014 M5 CP 2016 550i
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