08-16-2014, 01:40 PM
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#1
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Senior Member
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What is the stock MAF tube diameter?
My '99 5vzfe has the type of MAF sensor that bolts into the pipe (instead of the housing and pipe being all one assembly like on the '96-'98 models).
What is the inside diameter of the MAF tube? I tried to measure it with my dial calipers, but at one end of the pipe, the opening is larger, and transitions to a slightly smaller diameter closer to the MAF. My dial calipers couldn't reach down the pipe far enough to measure the smaller diameter.
I'm thinking the diameter is anywhere between 2 5/8" and 2 7/8". Does anyone know exactly what it is?
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1999 Toyota 4Runner Limited 4x4 - Turbocharged GTX3071 - uaEFI Standalone ECU - DW255 fuel pump - 550cc fuel injectors - Rear Elocker Retrofit w/ 4.30 gears - 2wd Low (2Lo) On Demand - 231mm Tundra Brake Upgrade - Hayden 699 Transmission Cooler - Monitoring ATF Temps w/ My iPhone - DIY Projector Headlight Retrofit - Backup Camera Retrofit - 265/75/R16 Cooper Discoverer AT3 - OME 906 Rear Coils
2000 Yamaha XR1800 Jet Boat - MR1 4-Stroke Engine Swap
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08-17-2014, 11:39 AM
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#2
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Join Date: Nov 2013
Location: Memphis, TN
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Join Date: Nov 2013
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Not sure why you ask, but my best guess is the o-ring is a piece of crap right now and needs to be replaced. I just replaced mine, but I went to the parts store and they took one off the shelf to find the right size for me.
I don't know the size, but offering a way to find out easily at the parts store. Good luck.
Dave
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SHEBA - My 1999 4R, 3.4L, Manual, 4WD, 2.5" EMU suspension.
BEST truck ever!!!!!!
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08-17-2014, 01:39 PM
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#3
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Senior Member
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Join Date: Jun 2011
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Senior Member
Join Date: Jun 2011
Location: Chattanooga, TN
Age: 39
Posts: 1,086
Real Name: Robert
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Quote:
Originally Posted by DocW8494
Not sure why you ask, but my best guess is the o-ring is a piece of crap right now and needs to be replaced. I just replaced mine, but I went to the parts store and they took one off the shelf to find the right size for me.
I don't know the size, but offering a way to find out easily at the parts store. Good luck.
Dave
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Huh? What o-ring? I'm not sure I understand what you're saying. If I go to the parts store and ask for a MAF sensor, they'll just hand me the sensor piece that drops into the tube. I'm wanting to know what the diameter of that tube is.
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1999 Toyota 4Runner Limited 4x4 - Turbocharged GTX3071 - uaEFI Standalone ECU - DW255 fuel pump - 550cc fuel injectors - Rear Elocker Retrofit w/ 4.30 gears - 2wd Low (2Lo) On Demand - 231mm Tundra Brake Upgrade - Hayden 699 Transmission Cooler - Monitoring ATF Temps w/ My iPhone - DIY Projector Headlight Retrofit - Backup Camera Retrofit - 265/75/R16 Cooper Discoverer AT3 - OME 906 Rear Coils
2000 Yamaha XR1800 Jet Boat - MR1 4-Stroke Engine Swap
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08-17-2014, 08:40 PM
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#4
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Join Date: Nov 2013
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Member
Join Date: Nov 2013
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I'm thinking I got a different setup or something. Anyways, the MAF I have is right behind the cruise control right after the air filter assembly. Held by 2 screws. O-ring but is a whole assembly all together.
I'm not sure of the diameter for the tube.
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SHEBA - My 1999 4R, 3.4L, Manual, 4WD, 2.5" EMU suspension.
BEST truck ever!!!!!!
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08-17-2014, 09:13 PM
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#5
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Elite Member
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Join Date: Nov 2006
Location: Pocono Mountains
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Also, that assembly includes TWO sensors: The MAF (two wires inside small tube) and the Intake AirTemp sensor (bulb on outside of tube). If you are trying to build your own MAF sensor assembly, I applaud your initiative but I think it is more effort than it is worth. Rockauto sells off-brand sensors for like $50. Has to be better than a homebuilt.
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'99 4Runner SR5 5spd 3.4L V6 4WD(U.S), original '99 Talls in front, OME 906s in back, Hella fogs, Trekmaster shocks in front, Billy in back, no running boards, FIAMM horns, Alpine sound, Michelin LTX M/S2's, owned since new.
'97 HiLux SW4 5spd 4WD(Japan model bought in Brazil assembled in Argentina, very close to a 3.0 4Runner/Surf)
'71 FordWillys Jeep CJ5 (with straight six Ford Maverick 3.0 liter engine--lives in the mountains north of Sao Paulo Brazil)
My Backyard Frame Swap
Last edited by TheDurk; 08-17-2014 at 09:29 PM.
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08-18-2014, 06:06 AM
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#6
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Senior Member
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Join Date: Jun 2011
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Senior Member
Join Date: Jun 2011
Location: Chattanooga, TN
Age: 39
Posts: 1,086
Real Name: Robert
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Quote:
Originally Posted by TheDurk
Also, that assembly includes TWO sensors: The MAF (two wires inside small tube) and the Intake AirTemp sensor (bulb on outside of tube). If you are trying to build your own MAF sensor assembly, I applaud your initiative but I think it is more effort than it is worth. Rockauto sells off-brand sensors for like $50. Has to be better than a homebuilt.
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Lol, I'm not building my own sensor. Do people actually do that? And yeah, I know the IAT is integrated into the unit.
I'm going to give CX's turbo manifolds and downpipe a go, and I need to build my own intake from the turbo to the throttle body. I need to maintain the same MAF tube diameter so to not throw the ECU off. Build thread to come soon.
__________________
1999 Toyota 4Runner Limited 4x4 - Turbocharged GTX3071 - uaEFI Standalone ECU - DW255 fuel pump - 550cc fuel injectors - Rear Elocker Retrofit w/ 4.30 gears - 2wd Low (2Lo) On Demand - 231mm Tundra Brake Upgrade - Hayden 699 Transmission Cooler - Monitoring ATF Temps w/ My iPhone - DIY Projector Headlight Retrofit - Backup Camera Retrofit - 265/75/R16 Cooper Discoverer AT3 - OME 906 Rear Coils
2000 Yamaha XR1800 Jet Boat - MR1 4-Stroke Engine Swap
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08-18-2014, 01:42 PM
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#7
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Quote:
Originally Posted by Robb235
Lol, I'm not building my own sensor. Do people actually do that? And yeah, I know the IAT is integrated into the unit.
I'm going to give CX's turbo manifolds and downpipe a go, and I need to build my own intake from the turbo to the throttle body. I need to maintain the same MAF tube diameter so to not throw the ECU off. Build thread to come soon.
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Ahhh, it would be better to explain what you are up to. We get as many nitwits as geniuses on here. Sorry, I don't have that dimension for you.
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'99 4Runner SR5 5spd 3.4L V6 4WD(U.S), original '99 Talls in front, OME 906s in back, Hella fogs, Trekmaster shocks in front, Billy in back, no running boards, FIAMM horns, Alpine sound, Michelin LTX M/S2's, owned since new.
'97 HiLux SW4 5spd 4WD(Japan model bought in Brazil assembled in Argentina, very close to a 3.0 4Runner/Surf)
'71 FordWillys Jeep CJ5 (with straight six Ford Maverick 3.0 liter engine--lives in the mountains north of Sao Paulo Brazil)
My Backyard Frame Swap
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