YotaTech Forums  

Go Back   YotaTech Forums > Toyota SUV & Truck Tech > Newbie Tech Section
Sign in using an external account
Register Forgot Password?
Search


Newbie Tech Section Often asked technical questions can be asked here

Welcome to Yotatech!
Welcome to Yotatech,

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!


Reply
 
LinkBack Thread Tools Search this Thread
Old 03-25-2012, 04:50 PM   #1
Registered User
Personal Sales Rating: (0)
 
Join Date: Mar 2012
Posts: 3
94 4runner stopped running while driving

my fiance recently bought a 94 yota 4runner...he was driving home the other day and it just stopped running on him while going down the road. He's ASE certified but this truck is frustrating him because he can't seem to figure out what is wrong with it. Did an OBD2 test on it pulled up code 24 (intake air temp signal fault), 31 (air flow meter circuit or vaccum fault) & 52 (knock sensor fault). He has replaced the MAF sensor and it's still not running. It's turning over it just will not run...any advice is greatly welcome at this point...
This ad is not displayed to registered members.
Register your free account today and become a member on Yotatech!
Miss12052 is offline   Reply With Quote
Old 03-25-2012, 10:08 PM   #2
Contributing Member
Personal Sales Rating: (0)
 
wyoming9's Avatar
 
Join Date: Apr 2009
Location: I live in New Tripoli Pa out in the woods
Posts: 6,443
Red face

Did the check engine light come on when it quit or did he pull up old codes that were never cleared??

there is it just quit

as just slowly had a loss of power

then it quit just like you turned off the key.

How about the simple things did he run out of gas??

Is he the type that drives around with the gas gauge between 1/4 and empty ?? Even knowing better!!

Did the timing belt break? the woodruff key shear off on the crank pulley.

Pretty much comes down to a fuel problem electrical or mechanical

If you can`t plug a tool into the engine to tell you what is wrong it can be repaired.

Back to the basics Good luck:jessica:
wyoming9 is offline   Reply With Quote
Old 03-25-2012, 11:02 PM   #3
Registered User
Personal Sales Rating: (0)
 
OverTheEdge's Avatar
 
Join Date: Mar 2012
Location: Washington
Posts: 24
Has he been able to confirm good spark, fuel and compression? Also, ran into a proplem of my own that sounds similiar. Malfuntion in theft deterant system Disabled the ignition system (spark) also affected the starting system threw the starter interupter cicuit. Good luck!
OverTheEdge is offline   Reply With Quote
Old 03-26-2012, 02:27 PM   #4
Registered User
Personal Sales Rating: (0)
Threadstarter [OP]
 
Join Date: Mar 2012
Posts: 3
in answer to both replies: it was running & then lost all engine power like instantly, check engine light never came on & still isn't on...dunno if it was old codes that weren't cleared, we just bought it about a week ago, gas tank was full, he hates driving below half a tank...timing belt looks like it was recently replaced (no visible wear &/or tear) has good spark, fuel & compression..pulled out the viper anti-theft system and still nothing...

Last edited by Miss12052; 03-26-2012 at 02:41 PM.
Miss12052 is offline   Reply With Quote
Old 03-26-2012, 03:07 PM   #5
Registered User
Personal Sales Rating: (0)
 
OverTheEdge's Avatar
 
Join Date: Mar 2012
Location: Washington
Posts: 24
This is interesting, an engine needs four things to run
1. Spark
2. Fuel
3. Compression
4. Air
If you have these then the engine will run, with all due respect this is fact.
Now on the other hand if all are present but one or more are weak(spark) or low(fuel/air flow) then it could prevent it from running. I would verify good numbers on all. also would check all grounds for clean tight connections. Please keep us updated on diagnosis and repair.
OverTheEdge is offline   Reply With Quote
Old 03-26-2012, 03:42 PM   #6
Registered User
Personal Sales Rating: (0)
 
OverTheEdge's Avatar
 
Join Date: Mar 2012
Location: Washington
Posts: 24
The above post was based on the assumption that the injectors are indeed allowing fuel into the combustion chamber.
I do not recommend this to anybody reading because of the potential of grave harm. But You say that your fiance is ASE CERT as am I. Therefore, in a situation like this I myself would give the engine a quick burst of starting fluid threw the thottle body, re install the air intake, to act as a spark arrest and see if the motor will fire. If so this would tell me that there is a fuel delivery problem. If it does not fire. it would lead me to the ignition system(Spark)
[B]DO NOT TRY TO USE GASOLINE FOR THIS TEST![/B] Had a fellow co worker set himself and the customers car on fire a few years back. It was not a good situation.
OverTheEdge is offline   Reply With Quote
Old 03-26-2012, 06:00 PM   #7
totally a bro
Personal Sales Rating: (2)
Staff
 
vital22re's Avatar
 
Join Date: Feb 2006
Location: kick yer face
Posts: 7,885
Send a message via AIM to vital22re
ASE and its running yet? 94 did not have obd2. Obd2 came out in 96, 95.5 for the tacoma's. Has he checked any of the fuses ? The code 52 will not prevent it from starting but rather how it runs. The other codes for the AFM will though. Did he replace the AFM with a used unit? or was it new? The AFM sends a signal to the COR(circuit opening relay) that energizes and sends power to the fuel pump.

Does he have spark?
If he sprays some starter fluid in it does it run for a second or two?
__________________
92 toyota truck sc'd 3.4, URD 7th injector kit, 2.1 URD pulley, 5spd, 4.30 gears, E locker rear, magna flow cat and muffler, 2 1/2 pipe, isr mod, 1" BL, trail gear sliders, 1.5 bjs front, sway away torsion bars, add a leafs and 2inch lift shackles rear, rancho 5000 265/75/r16 nitto terra grapplers, xrc8 winch in front bumper, rhino lined bed.
RB4R- SA

Quote:
Originally Posted by 92 TOY View Post
you're gonna have so much money, you're gonna have to set it on fire to make room for more
Quote:
Originally Posted by BigBluePile View Post
I NEVER have problems getting my crank off....
.....not sure why so many people have problems.
Forum Rules
TREADLIGHTLY
Possibly end your existance for a dollar?
vital22re is offline   Reply With Quote
Old 03-26-2012, 06:24 PM   #8
Contributing Member
Personal Sales Rating: (1)
 
James Woods's Avatar
 
Join Date: Oct 2010
Location: Beav-Town, OR
Posts: 1,579
ASE just means that you can pass a test, doesn't mean you can fix anything. I have seen some darn good techs fail some ASE tests and some guys that can't do an oil change right pass the test. Last time I took the test I had just left the bar and didn't care if I passed or not, took it in 15 minutes and passed. Nothing against your Fiance as I don't know what kind of a tech he is, but why are you here asking questions and not him?

Getting that out of the way, has he checked the FSM or have access to Alldata? Has he checked any of the above yet?
__________________
1988 Pickup dubbed -Bucket-Build-
Ongoing garage queen project at the moment
Trail Gear 4.7 T-Case gears, Dana 60 front axle, 14 Bolt FF rear axle, All-Pro T-case parking brake,
Dents and Stickers and now with lots more dents.


1998 Toyota 4runner Limited-
4wd, Automatic, 3.4 5vze and Rear E-Locker Daily Driver.

James Woods is offline   Reply With Quote
Old 03-26-2012, 08:40 PM   #9
Registered User
Personal Sales Rating: (0)
 
OverTheEdge's Avatar
 
Join Date: Mar 2012
Location: Washington
Posts: 24
Direct and to the point JW.

Last edited by OverTheEdge; 03-27-2012 at 07:47 AM. Reason: Side tracked from the point
OverTheEdge is offline   Reply With Quote
Old 03-26-2012, 08:57 PM   #10
Registered User
Personal Sales Rating: (0)
 
OverTheEdge's Avatar
 
Join Date: Mar 2012
Location: Washington
Posts: 24
http://www.ncttora.com/fsm/1990-1995_4Rnr/Toyota.4Runner.1990.1995/contents.htm[/URL]
OverTheEdge is offline   Reply With Quote
Old 03-27-2012, 07:12 PM   #11
Registered User
Personal Sales Rating: (0)
 
Join Date: Mar 2012
Posts: 1
Smile

Howdie, I am new to Yota tech site. Just read about your dilema. If after you have checked out all the good advice from all the replys to your S.O.S. and if nothing seems to resolve your problem. I had an experience years ago with a
new buick and while driving on the highway on a business trip my perfectly running vehicle suddenly
just up and quit and would not start. After an expensive tow to the nearest G.M. dealership and
3 days in the shop Voila! Mystery solved. The distributor shaft gear was completely stripped balder than a chicken in a tornado.You might want to pull the distributor and check the gears. And like
i said it may be a long shot but it is easy enough to check out. Hope your problem is solved soon,good luck.I know 4-Runners can be mysterious. I own a 92 Runner Medalist Limited nice rig just mischevious thats all.
Prairie Dog is offline   Reply With Quote
Old 03-27-2012, 07:30 PM   #12
Registered User
Personal Sales Rating: (0)
 
OverTheEdge's Avatar
 
Join Date: Mar 2012
Location: Washington
Posts: 24
Very Good advise that i overlooked. To expand on Prairie Dogs input, simply remove cap rotate engine and see if rotor turns. Nice P.D. See Ya!
OverTheEdge is offline   Reply With Quote
Old 03-28-2012, 10:48 AM   #13
Registered User
Personal Sales Rating: (0)
Threadstarter [OP]
 
Join Date: Mar 2012
Posts: 3
figured it out...when previous owners replaced timing belt they didn't bother resetting the timing so he reset the timing & replaced the old belt with a new one...running like a champ now & thanks for all the input...i was asking simply because i'm more pc literate w/ forums & what not...plus he was literally banging his head against the wall in frustration as to what the problem could have been...
Miss12052 is offline   Reply With Quote
Old 03-28-2012, 03:41 PM   #14
Registered User
Personal Sales Rating: (0)
 
OverTheEdge's Avatar
 
Join Date: Mar 2012
Location: Washington
Posts: 24
Back on the road again, excellent!
OverTheEdge is offline   Reply With Quote
Old 03-28-2012, 04:26 PM   #15
totally a bro
Personal Sales Rating: (2)
Staff
 
vital22re's Avatar
 
Join Date: Feb 2006
Location: kick yer face
Posts: 7,885
Send a message via AIM to vital22re
Quote:
Originally Posted by Miss12052 View Post
figured it out...when previous owners replaced timing belt they didn't bother resetting the timing so he reset the timing & replaced the old belt with a new one...running like a champ now & thanks for all the input...i was asking simply because i'm more pc literate w/ forums & what not...plus he was literally banging his head against the wall in frustration as to what the problem could have been...
That doesn't sound right. You mean the timing belt jumped a couple teeth?

That does happen as timing belts get worn out in time.
__________________
92 toyota truck sc'd 3.4, URD 7th injector kit, 2.1 URD pulley, 5spd, 4.30 gears, E locker rear, magna flow cat and muffler, 2 1/2 pipe, isr mod, 1" BL, trail gear sliders, 1.5 bjs front, sway away torsion bars, add a leafs and 2inch lift shackles rear, rancho 5000 265/75/r16 nitto terra grapplers, xrc8 winch in front bumper, rhino lined bed.
RB4R- SA

Quote:
Originally Posted by 92 TOY View Post
you're gonna have so much money, you're gonna have to set it on fire to make room for more
Quote:
Originally Posted by BigBluePile View Post
I NEVER have problems getting my crank off....
.....not sure why so many people have problems.
Forum Rules
TREADLIGHTLY
Possibly end your existance for a dollar?
vital22re is offline   Reply With Quote
Old 04-01-2012, 04:30 PM   #16
Registered User
Personal Sales Rating: (0)
 
Join Date: Dec 2011
Posts: 68
Same thing happened to mine but i'm still banging my head against the wall.
AZSPEED is offline   Reply With Quote
Old 04-01-2012, 04:30 PM
Yotatech
4WD Truck




Paid Advertisement
Reply

Tags
4runner, 92, 94, april2012, car, driving, forerunner, off, runs, start, stop, stopped, toyota, toyoto, wont, wrong

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -8. The time now is 05:03 AM.


2010 InternetBrands, Inc.