Another 4wd not working thread
#1
Another 4wd not working thread
Hey guys, new to the forum here, and I just bought a manual 1996 4runner sr5 with 280k km's. So far this site has helped me out a lot in trying to get this truck working properly. One thing I'm still having issues with is the 4wd.
When I first bought the truck, it needed a battery and every time I would boost it the 4wd would work. However, ever since I put the new battery in, the 4wd is acting up, to the point where it wouldn't engage anymore. So the first thing I did is to swap the VSV hoses on the driver side fender and the 4wd seemed to work again. While driving with the 4wd on, I saw the light go off on the dash. When I try to get it back into 4hi,it wouldn't engage and the light would appear then disappear right away. Any ideas?
One thing I did notice is that if I'm driving and put it into 4hi, it will work,light comes on, but as soon as I let go of the gas the light will go away.
When I first bought the truck, it needed a battery and every time I would boost it the 4wd would work. However, ever since I put the new battery in, the 4wd is acting up, to the point where it wouldn't engage anymore. So the first thing I did is to swap the VSV hoses on the driver side fender and the 4wd seemed to work again. While driving with the 4wd on, I saw the light go off on the dash. When I try to get it back into 4hi,it wouldn't engage and the light would appear then disappear right away. Any ideas?
One thing I did notice is that if I'm driving and put it into 4hi, it will work,light comes on, but as soon as I let go of the gas the light will go away.
#2
Registered User
Hey guys, new to the forum here, and I just bought a manual 1996 4runner sr5 with 280k km's. So far this site has helped me out a lot in trying to get this truck working properly. One thing I'm still having issues with is the 4wd.
When I first bought the truck, it needed a battery and every time I would boost it the 4wd would work. However, ever since I put the new battery in, the 4wd is acting up, to the point where it wouldn't engage anymore. So the first thing I did is to swap the VSV hoses on the driver side fender and the 4wd seemed to work again. While driving with the 4wd on, I saw the light go off on the dash. When I try to get it back into 4hi,it wouldn't engage and the light would appear then disappear right away. Any ideas?
One thing I did notice is that if I'm driving and put it into 4hi, it will work,light comes on, but as soon as I let go of the gas the light will go away.
When I first bought the truck, it needed a battery and every time I would boost it the 4wd would work. However, ever since I put the new battery in, the 4wd is acting up, to the point where it wouldn't engage anymore. So the first thing I did is to swap the VSV hoses on the driver side fender and the 4wd seemed to work again. While driving with the 4wd on, I saw the light go off on the dash. When I try to get it back into 4hi,it wouldn't engage and the light would appear then disappear right away. Any ideas?
One thing I did notice is that if I'm driving and put it into 4hi, it will work,light comes on, but as soon as I let go of the gas the light will go away.
The swap hose technique is just a test--you don't want to leave it that way. You got that, right?
Last edited by TheDurk; 01-07-2014 at 10:38 AM.
#3
Thanks durk, I'll take a look at the check valve this weekend and post what I find. I know the swapping hoses is just a test, but my car got stuck and I had to leave them swapped. Does swapping these have any negative impacts on the truck?
#4
Registered User
Did the vacuum stay on one side of the VSV's regardless of 2H or 4h or 4L?
Or did it switch back and forth?
Last edited by TheDurk; 01-07-2014 at 05:14 PM.
#6
Registered User
EDIT: Found a pic:
I had a 1985 BMW e23 735i that had vacuum powered AC controls. Whenever you let off the gas, the A/C would get turned into heat. The issue turned out to be the $3 check valve.
Last edited by TheDurk; 01-08-2014 at 11:57 AM.
#7
Registered User
To piggy back on this topic, my 4x4 engages and then takes forever for it to disengage. To the point I have to stop and mess with my 4wd lever. What part or parts could this be?
Thanks
Thanks
Trending Topics
#8
Registered User
The front diff uses a vacuum actuator to both engage and disengage the right side CV shaft. There is one vac line feed to the electrically activated air valves on the left side fender, then two lines (one from each valve) down to the actuator. It's possible that the one that engages is fine, no leaks, but the one that disengages has some leaks (splits at either end, holes in the middle) and isn't able to pull the actuator very well. Or the solenoid air valve itself is sticking and not opening very well.
#10
theres a good chance your 4wd indicator switch is going bad. If it doesn't work properly it won't send current to the vsv's to actuate the front diff. In the front diff itself is another sensor that will light up the dash when the diff is actuated. But they all tie together so if one switch isn't working 4wd won't light up even if the transfer case is is spinning the front drive shaft.
Thread
Thread Starter
Forum
Replies
Last Post
RedRunner_87
95.5-2004 Tacomas & 96-2002 4Runners (Build-Up Section)
84
06-01-2021 01:51 PM
bowhunter1640
95.5-2004 Tacomas & 96-2002 4Runners
18
07-05-2015 03:30 PM
TheManOutside
95.5-2004 Tacomas & 96-2002 4Runners
0
06-18-2015 03:32 PM