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I messed up my 4runner! Air Flow Meter Problem

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Old Mar 15, 2008 | 12:41 AM
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Unhappy I messed up my 4runner! Air Flow Meter Problem

95 4Runner 4X4 V6

About a week ago, i noticed she was running a little rough at idle, and my check engine light was on. Browsing through forums, i came across cleaning the maf sensor. So i went to what i thought was the maf to later find out i dont have one, and that i have a afm. I disconnected - battery, then the connection at the afm. I then unscrewed the 2 screws here...big mistake


Slightly pulled on it, and this aint right. So i connected everything back together. Tried starting her, and she went crazy. Idling mad, dash lights came on, black smoke out the exhaust tip, then eventually cut off. Took a razor blade and took off the top plate to take a look inside. I did not pull anything apart. Put the top back together and got the same thing.

I took a look at the connection and seen a piece had broken off, so i then had a loose connection. After numerous junk yards, found the connection piece and spliced it to connect to the afm, with the metal clip to hold it, Started her up and got the same thing, but not as bad. I then went to play with the connection a little bit while she was running. I noticed when i slightly lifted the connection, she was smooth, and the black smoke turned to white (she sat for 10 days). When i let go of the connection, she started going crazy again, back and fourth.

So i rigged a metal plate underneath the connection and zip tied it to keep it in place. She now idles good with check engine light on. Went to apply the gas, and white smoke. Im gonna try and drive her tomorrow to auto zone and have some codes pulled. Somewhere i seen on a forum, i can pull the codes myself? If someone has a link, that would be great. I dont know how safe it is to drive her .with this ghetto rig i did. There is no reason i should have to do this, but something is wrong. Everything is lined up, ok and connection is held together tight. What i should of done was leave it alone, and i would of never had this problem

Last edited by djrazr; Mar 15, 2008 at 12:45 AM.
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Old Mar 15, 2008 | 05:24 AM
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From: Wilkes Barre Pa.
I did the same thing many years ago and I had to solder everything in there back together nice and solid .GOOD LUCK if not a new one is like $250 or go to a salvage yard
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Old Mar 15, 2008 | 05:54 AM
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I got a few let me know if you need one
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Old Mar 15, 2008 | 08:56 AM
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From: maple ridge, British Columbia, Canada
Check the codes yourself. Autozone will not/ cannot check codes from our trucks.
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Old Mar 15, 2008 | 09:09 AM
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Originally Posted by ozzydg55
I did the same thing many years ago and I had to solder everything in there back together nice and solid .GOOD LUCK if not a new one is like $250 or go to a salvage yard
X2, been there done that. Why did Toyota engineers put those screws there?????? There is no reason to ever take those screws out. Edited: I didn't read it though good before I posted.

Last edited by mt_goat; Mar 15, 2008 at 09:15 AM.
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Old Mar 15, 2008 | 12:06 PM
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Originally Posted by Jay351
Check the codes yourself. Autozone will not/ cannot check codes from our trucks.
How do i check codes myself? Is there a link that tells you step for step?
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Old Mar 21, 2008 | 10:08 PM
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From: Wauconda, IL/Edwardsville, IL
I did the same damn thing a few months back. Just kept cranking and wouldn't start. Popped the cover off, small screwdriver in hand and get everything back to spec in 10 minutes, made it on time to my date too!

Do us a favor, put your camera in macro, and take a picture of the sensor with the black cover off.

As for the codes, there should be a DIAG. or DIAGNOSTICS connection on the left side of the engine. Using a paperclip short two terminals (brain fart)
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Old Mar 21, 2008 | 10:21 PM
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I think he needs to know which terminals... :-)
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Old Mar 21, 2008 | 10:31 PM
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Check this out
Jim

http://personal.utulsa.edu/~nathan-b...85diagnosi.pdf

Last edited by foot0069; Mar 21, 2008 at 10:33 PM.
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Old Mar 21, 2008 | 10:33 PM
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From: Wauconda, IL/Edwardsville, IL
Lol yea, I dudn;t remember but now I do!

Short terminals e1 & t1. Then turn the car to the on position, but don't start it. Count the flashes, then report it back here.
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Old Feb 26, 2018 | 04:33 PM
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sorry i am new to the forum i just pulled the 2 screws out of the afm. Any help on how to get the black cover off with out messing it up more and where each connector goes. I see i am not the first to do this so hoping someone might remember how they did it
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Old Feb 26, 2018 | 04:50 PM
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Originally Posted by Robert Mason
sorry i am new to the forum i just pulled the 2 screws out of the afm. Any help on how to get the black cover off with out messing it up more and where each connector goes. I see i am not the first to do this so hoping someone might remember how they did it
Have no ideas what screws you removed. To remove black square cover. Cut silicon and pry off. Don’t need to remove connector socket mounted to AFM. If your asking these questions you need to do more research or this could get really frustrated and possibly expensive
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Old Feb 26, 2018 | 10:36 PM
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Originally Posted by Robert Mason
sorry i am new to the forum i just pulled the 2 screws out of the afm. ...
Originally Posted by muddpigg
Have no ideas what screws you removed. ...
A picture paints a thousand words.
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Old Feb 27, 2018 | 06:45 AM
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Here is a photo of an 86 for reference..
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Old Feb 27, 2018 | 08:16 PM
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Thank you for the picture i am confident i can solder the 3 connectors back to the circuit board. i plan on after the rebuild trying it before i seal the top back on. Any recommendations on what silicone to use.
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Old Feb 28, 2018 | 06:33 AM
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From: Enterprise, AL
Originally Posted by Robert Mason
Thank you for the picture i am confident i can solder the 3 connectors back to the circuit board. i plan on after the rebuild trying it before i seal the top back on. Any recommendations on what silicone to use.
you can rebuild or adjust circuit board so you get slide has non worn material under it.

and why are you rebuilding AFM?
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Old Feb 28, 2018 | 09:11 AM
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was not intending to mess with part at all was removing everything from engine bay to rebuild engine due to coolant in number 5 spark plug hole. a new pressure plate for the clutch. the connector to the afm was a brain fart. Have done multiple head gaskets, motor swaps first time ruining an electrical component
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