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!
Expedition Four Wheel LLS Load Leveling Suspension Help
I also posted this in a really old post. I have a 1999 Ford Expedition with 4 wheel air ride suspension and the rear suspension is completely flat and I have taken it to two garages and paid the $70.00 each to tell me what was wrong and so it appears they just want to throw parts at it because I replaced the compressor and drier per first garage then the rear flow sensor per the second place. so front air shocks are a year old and rear air bags are a few years old per previous owner so all that is left to replace is two more flow sensors, air lines and the relay. I am seeing things in this thread about a relay and a air suspension electrical variable orifice (evo) out of range where are these located and are there ways to test them.
rear ride height sensor is attached and when I move it the compressor does kick on.
I do know all about how you can replace the air ride with struts so please don't post letting me know about this option I am going to beat this thing and then when I go to the garages to get my money back I can tell them what was wrong since they couldn't figure it out.
I traced all the air lines from the compressor to the rear air bag and took them apart at each connection and used an air compressor to blow air through them to verify there are no plugged lines.
When you moved the rear ride height sensor, and the compressor kicked on did it lift the rear air bags? Or maybe check to see if air is coming out of the air lines in the rear while moving the rear ride height sensor ..
I traced all the air lines from the compressor to the rear air bag and took them apart at each connection and used an air compressor to blow air through them to verify there are no plugged lines.
If the front rises, I'd assume that the compressor is capable of pumping out air.
I'd be more concerned that there is a leak as opposed to a plugged line.
Did you sprits down all the lines, connectors, and the rear bags with soapy water to check for leaks? Especially the infamous connector/union located near/under the master cylinder area?
Did these two garages have a Ford specific scan tool? Are they capable of pulling "B" codes?
__________________
Jim in Central NY
'79 2WD F-150 Lariet w/302,4spd OD, 228,965 mi. (Original Owner!)
'02 4X4 Navigator w/5.4L DOHC 32v Intech V-8 (VIN R). http://www.fuelly.com/sig-us/50500.png
The first garage said they tested for leaks by smoking the lines. when I raise and lower the rear load leveling sensor it does not raise the rear suspension. I just got off the phone with Belle Tire (the second place I took it and it is there again) they said the air is getting back to the rear suspension and they could not find any leaks. They recommended switching over to coil springs because they are unsure if I put a low cost compressor in it which I did (good compressor just cheaper than they would charge) but it was the same as the one I took out. I don't know if the factory one says ford on it but this one says Gast and Arnott air systems. I guess I will take it to the Ford Dealer next.
They recommended switching over to coil springs because they are unsure if I put a low cost compressor in it which I did (good compressor just cheaper than they would charge) but it was the same as the one I took out.
I may have missed the point, but why did you change the compressor in the first place?
And if the current compressor can lift the front, why is the it suspect for the rear not rising?
__________________
Jim in Central NY
'79 2WD F-150 Lariet w/302,4spd OD, 228,965 mi. (Original Owner!)
'02 4X4 Navigator w/5.4L DOHC 32v Intech V-8 (VIN R). http://www.fuelly.com/sig-us/50500.png
I replaced the compressor because the first garage said it was leaking and they wanted $850.00 parts and labor it was leaking where the compressor dryer connects to the compressor but in hind sight I think all the leaking did is make the compressor run harder which in the end would have burnt it up so I thought replace it and rule it out but I would really like to know if there is a way to measure the PSI that it is pumping out
The lines coming out of the compressor dryer are slightly leaking. I just came from the Ford dealer asking questions and the mechanic came out and said the compressor was leaking enough to be a problem and he said the lines have to be perfect and he gave me a working compressor dryer for free and said try this as the connectors were in good condition. It is raining and I have to work outdoors so I will work on it tomorrow first I will trim up the lines and make them perfect then try the dryer if needed I will look at the union below the master cylinder for leaks also
Arnott makes OEM replacement parts so you are safe with that compressor.
Can you contact me by email? superdragpak-65f100 at yahoo dot com
__________________
1966 F250 Deluxe Camper Special "RANGER" Special Paint
1965 F250 Deluxe Camper Special Unrestored Original
1966 F100 powered by a 482" Dual Quad Side Oiler
1966 F100 Plain Jane AZ Grandpa Truck 352 3spd
1966 F250 Plain Jane Red/Red Long Bed 3.5L EcoBoost
02' PowerSmoke
as originally stated "I do know all about how you can replace the air ride with struts so please don't post letting me know about this option I am going to beat this thing" "NAILED IT" I cut back to new lines so the ends are straight and clean and I replaced the brand new compressor dryer (must have been a faulty rebuilt unit?) I think both helped but the one answer that I could not find out from two garages and the ford dealer is how much pressure should be blowing out the air line when you detach it from the rear air bag. I have the answer now... enough that you can hear it nice and loud over the engine running maybe even compares with a little pancake compressor's output. not so sure I needed these parts could have just needed the leaks fixed. anyhow new parts can't hurt and I got them at these .com's = resources buyautoparts for a compressor $190.00 and rockauto for the 3 air flow sensors @about $60.00 each versus dealer @ $100.00 each.
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company.
