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 Another Old Iron performance Issue
#828025
08/01/07 02:32 PM
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Joined: Jan 2000
Posts: 8,160
OP
Web Wheeler
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1.5 Years ago I had a terrible engine rebuild, just no power. And that lack of power kept getting worse until the truck would hardly run. What my mechanic discovered was the thin wire in the MAF(Mass air flow sensor) was caked in gunk. Simply cleaning that wire(not buying a new sensor) breathed new life into the rig. Will be interesting to see what happens to fuel economy. Also got rid of an early morning extremely high idle. So if your 3.0 is 15-20 years old, you might want to inspect that sensor the next time you are out cleaning your IAC motor.
1996 SR From the Area 51 Skunk Works. 37"BFG Tires, 5" lift, Rock Track 4:1 Case, Tom Woods Drive Shafts, Oasis Air, Front ARB, lifted gas tank, T-max winch and lots of stuff that cost too much.
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Re: Another Old Iron performance Issue
[Re: Lloyd Swartz]
#828026
08/01/07 06:54 PM
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Joined: Jan 2001
Posts: 3,876
Roll Me Over
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So if your 3.0 is 15-20 years old, you might want to inspect that sensor the next time you are out cleaning your IAC motor.
I thought our MAF was located on the airfilter housing where the wire hooks up on its lid. If I am correct what does it have to do with cleaning the IAC motor? Unless that is just the suggested interval.
89 2dr 3.0 AT, manual hubs. 33x12.5 MT gen 2 coils,Cranked front tbars Dons rocker protection, Front/Rear Bumpers. ARB rear locker, 2" BL, Beefed up skid plates/trailing arms. Gen II uca, 2 Bouncy seats www.youtube.com/TagGeorge
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Re: Another Old Iron performance Issue
[Re: Tag]
#828027
08/01/07 08:52 PM
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Joined: Mar 2007
Posts: 950
Rock Warrior
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So if your 3.0 is 15-20 years old, you might want to inspect that sensor the next time you are out cleaning your IAC motor.
I thought our MAF was located on the airfilter housing where the wire hooks up on its lid. If I am correct what does it have to do with cleaning the IAC motor? Unless that is just the suggested interval. Yes MAF is located on the airfilter housing. It is a thin wire. Like IAC cleaning it is a maintenance item. he's preaching to me... this is the list of my sins. what product do you clean the MAF with? what will work? Is is a wire or film type maf on the montero?
1989 5 door montero 3.0 auto
stock original Japanese
about 200k miles
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Re: Another Old Iron performance Issue
[Re: generation_one]
#828028
08/01/07 10:35 PM
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Joined: Feb 2000
Posts: 3,269
Roll Me Over
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Thin wire? pics? I thought the maf looked like honeycomb..
99 Gen 2.5, fixing blown head gasket
89 SWB- 33's, ARB Front locker, SR rear locker/axle, SR F brakes, winch, WST Offroad Armor all Around, 2.85 Aussie T-case Gears (SOLD)
Sold: (2) 95 SR's, 86 SWB, 90LWB, 91 LWB
-Can Change a timing belt in my sleep..
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Re: Another Old Iron performance Issue
[Re: justice]
#828029
08/01/07 11:37 PM
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Joined: Mar 2007
Posts: 950
Rock Warrior
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Thin wire? pics? I thought the maf looked like honeycomb.. Amen Brutha Justice ... Glory Hal-alou-ya ! that seems right. Specifically how to clean it? I think frankR said he removed the "noise filter" thing . that was a few months ago, I dont really remember. Judging by the dirt on my noise filter, I would guess the sensor is filthy too
1989 5 door montero 3.0 auto
stock original Japanese
about 200k miles
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Re: Another Old Iron performance Issue
[Re: generation_one]
#828030
08/02/07 12:02 AM
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Joined: Feb 2000
Posts: 3,269
Roll Me Over
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Maybe I'm thinking of my 95SR..I'll poke around on my 89 tonight..
99 Gen 2.5, fixing blown head gasket
89 SWB- 33's, ARB Front locker, SR rear locker/axle, SR F brakes, winch, WST Offroad Armor all Around, 2.85 Aussie T-case Gears (SOLD)
Sold: (2) 95 SR's, 86 SWB, 90LWB, 91 LWB
-Can Change a timing belt in my sleep..
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Re: Another Old Iron performance Issue
[Re: generation_one]
#828031
08/02/07 03:15 AM
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Joined: Feb 2004
Posts: 10,238
Web Wheeler
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I think frankR said he removed the "noise filter" thing . No, not me - as long as the filter element is clean, it passes plenty air for my blower, so it should for any N/A 3.0L SOHC truck engine. It is a good idea to check it and/or replace it if it's dirty... they're fairly inexpensive IIRC. I will be removing it when I install the MegaSquirt ECU and change to a MAP system to replace the MAF system. The MAF sensor will be removed also, but that's not something you can do unless you're changing engine computers to a MAP system. Frank
'89 [color:"white"]G-Raider[color:"white"] [color:"black"]Supercharged 3.0L, MegaSquirt 2, lockup A/T, 2.5" exhaust, 172k, Cibie H4s/Oscar SCs, Hella Micro DE fogs, Cobra CB, Superwinch hubs, LSD rear/Aussie Locker front, Bilsteins, Lifeline AGM, Rust-Oleum
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Re: Another Old Iron performance Issue
[Re: FrankR]
#828032
08/02/07 03:43 AM
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Joined: Feb 2000
Posts: 3,269
Roll Me Over
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OK I think I spotted the wire that Lloyd was refering to..if you look at the "honecomb" portion of the sensor there's what looks like a bare copper wire between two terminals. Mine looked clean and new so I left it alone. Must sense air temp or something. I could see how it might get dirty...
Last edited by justice; 08/02/07 03:44 AM.
99 Gen 2.5, fixing blown head gasket
89 SWB- 33's, ARB Front locker, SR rear locker/axle, SR F brakes, winch, WST Offroad Armor all Around, 2.85 Aussie T-case Gears (SOLD)
Sold: (2) 95 SR's, 86 SWB, 90LWB, 91 LWB
-Can Change a timing belt in my sleep..
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Re: Another Old Iron performance Issue
[Re: FrankR]
#828033
08/02/07 04:01 AM
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Joined: Mar 2007
Posts: 950
Rock Warrior
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1989 5 door montero 3.0 auto
stock original Japanese
about 200k miles
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Re: Another Old Iron performance Issue
[Re: justice]
#828034
08/02/07 08:07 AM
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Joined: Nov 2001
Posts: 3,272
Roll Me Over
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MAFs on most cars are a single (or couple/few wires) positioned vertically between the air filter housing and intake. There's always a plug that usually has one or two wires coming off of it. The wire has current running through it to maintain a constant temp. When air flow across, it raises or lowers the temp of the wire causing a change in the amount of current required to maintain constant temp. ECU senses change and regulates injector fuel input accordingly. Here is a brief article...
73 -Jon KJ6GVM As seen on Expedition with TX plates: VEGETARIAN - An old Indian word for poor hunter Grampa's Trooper 1974 FJ40 1987 FJ60
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