Hey everyone,
Sorry I'm about to post a little essay. I have a '99 3.4L SR5 4WD 4Runner. A few months ago I discovered it wouldn't shift in 4hi and 4lo. When I pull the lever from 2hi to 4hi, I feel the usual resistance like something is engaging, but I don't get the dash light and I don't think I'm in 4hi because the steering isn't tighter like it usually is.
4WD fuse by driver side door is good.
Tried checking the VSV hoses today. There is vacuum after the check valve (from the intake) but it isn't particularly strong. Not sure how strong it needs to be. When I switch the hoses going to the diff, 4WD doesn't engage. I checked the hoses where they connect to the diff, and both seem to maintain (very low) suction (I tried both hooked up to the port on the VSV which has suction) so I don't believe there's a major leak in any of the hoses. When I switch to 4wd I don't get suction from the other port of the VSV.
Worth noting that a few months back I got stuck mudding and there was water pretty high up into the engine bay. That messed up a number of things including the ABS (replaced ABS module), starter, and gas gauge. So if there are components sensitive to water in the system, that's likely the issue, but as I understand there's no 4x4 computer/ecu in 3rd gen runners (vacuum actuated vs. electronically actuated). It's possible water got into the actuator even that's supposed to be sealed as I understand.
Any thoughts? Especially about the proper amount of vacuum/suction? The amount of suction felt pretty low to me, but I don't know what's normal.
Sorry I'm about to post a little essay. I have a '99 3.4L SR5 4WD 4Runner. A few months ago I discovered it wouldn't shift in 4hi and 4lo. When I pull the lever from 2hi to 4hi, I feel the usual resistance like something is engaging, but I don't get the dash light and I don't think I'm in 4hi because the steering isn't tighter like it usually is.
4WD fuse by driver side door is good.
Tried checking the VSV hoses today. There is vacuum after the check valve (from the intake) but it isn't particularly strong. Not sure how strong it needs to be. When I switch the hoses going to the diff, 4WD doesn't engage. I checked the hoses where they connect to the diff, and both seem to maintain (very low) suction (I tried both hooked up to the port on the VSV which has suction) so I don't believe there's a major leak in any of the hoses. When I switch to 4wd I don't get suction from the other port of the VSV.
Worth noting that a few months back I got stuck mudding and there was water pretty high up into the engine bay. That messed up a number of things including the ABS (replaced ABS module), starter, and gas gauge. So if there are components sensitive to water in the system, that's likely the issue, but as I understand there's no 4x4 computer/ecu in 3rd gen runners (vacuum actuated vs. electronically actuated). It's possible water got into the actuator even that's supposed to be sealed as I understand.
Any thoughts? Especially about the proper amount of vacuum/suction? The amount of suction felt pretty low to me, but I don't know what's normal.
