JAMMAN
Owns A Torsen
Joined: Mon Sep 18th, 2017
Posts: 6342
Name: Jim Occupation: 5 axis cnc programmer Interests: RBV's
Reputation Points: 10226
|
I put this in a separate thread but is in response to a members questions on his 98 ranger 4WD with a 4.0. These pictures are from a 2000 which should be similar if not exact EXCEPT for the fact that this particular 2000 was made after they stopped the Vacuum pulse hubs for the front wheels.
***SUB NOTE***
Rumor is that a 2000 made in late 99 had the vacuum hubs and anything made in 2000 did not. I personally own a 2000 made in February 2000 and it does not have PVH. I have never worked on or owned a 4WD Ranger made in 99 that was a 2000 so I call it a rumor till I see it.
First off, this is where most of the vacuum comes off the plenum.
This is on the driver side by the firewall, the electrical connection you see on the right is the wiper motor:
There is another line hooked to the throttle body that comes from somewhere under the intake plenum but it is irrelevant to this routing. I have a plenum in a crate in the garage, when I dig it out eventually I will add that connection to this post.
This is another angle of above:
The big hose goes to the power assist for the brakes. The fitting on the right has 3 plastic tubes coming from it.
2 go into a plastic loom and around the back of the plenum to the driver side.
The single one goes to the evap service port.
Here you can see the lines and how they split up:
The single line from the left split goes to the evap service port which is under the ABS unit.
You can see the cream yellow line taped to the larger black line, it goes under the service port and connects with a 90 to the bottom:
Now to the other side of the engine, passenger side. This is from the thicker portion of the split from the plenum that goes behind it. It contains 2 plastic lines, both red on this ranger. One goes to the injector damper on the fuel rail as covered by 410customs in another thread:
BUT the second line comes toward the fender and connects to the vacuum accumulator that looks like a ball in a ranger:
The position of the lines is important because the vacuum accumulator has a built in check valve on the top port where the line goes to. The bottom line continues to the firewall about where the blower motor and box for the AC is.
It is the dark black smaller horizontal(ish) plastic tube, the pic was taken from the passenger side right above the blower motor:
The firewall connector on the outside I could not get a good picture of, but the connector under the dash on passenger side is right above the fuel cutoff inertia switch. It splits off in a few directions and looks like this:
It feeds all of the internal vacuum stuff like heater control doors and blend doors.
The control for the blend doors and such is the right of the 3 knobs on your HVAC control panel and is a vacuum switch as well as an electrical switch. Those colored plastic lines going into the gray foam wrap are vacuum lines:
So if your blend doors or AC starts blowing warm when you accelerate it is probably a leak somewhere after the vacuum accumulator.
If you can't find a leak after the accumulator you can check the accumulator itself by letting the truck idle with AC off for a few seconds... turn the truck off, pull the top line off the accumulator. You should hear nothing since the check valve is on the top port. If you hear vacuum sucking in for a second then the check valve is bad but it can't be replaced as it is molded in to the accumulator.
BUT you can buy a check valve! One common one is a Dorman Part # 47149 as of this post still available all over the place for less than 6 bucks in most cases. Put it in line with the top port of the accumulator and things should start working.
If pulling the top hose nets no noise meaning the check valve is working, pull the bottom hose. You should hear a sucking noise for a couple seconds. Reminder: this needs to be done soon after turning the engine off.
If no sucking noise pulling the top hose (normal condition when things are working properly) and no sucking noise when pulling the bottom hose... there is a leak somewhere in the system beyond the check valve. It could still be a cracked accumulator but it is rare unless your truck was in an accident.
Mine still made the sucking noise several minutes after turning the truck off but my hoses are healthy for the most part and I have had no issues.
Reminder this is on a 2000 4WD Ranger with a 4.0 but the 99 and 98 with a 4.0 should be almost identical with the exception of the extra line going to the PVH solenoid and from it to the front wheel hubs.
____________________
00 XLT 4WD RCSB 3.GO! Jalapeño
01 XLT 2WD RC Steppie 3.0 auto Silver
The future belongs to those who show up.
|
