Ford 7.3L Power Stroke (1999-2003) :: ESOF Won't Engage - How To Diagnose Vacuum Leak
How to diagnose a vacuum leak without a vacuum leak diagnostic tool.
My ESOF won't engage, AC/heat blowers default to defrost - classic symptoms. And while we can leave without AC/heat, we really need the ability to engage 4x4 low, especially as we get higher into the Andes and the roads become rough.
Ford 7.3L Power Stroke (1999-2003) :: Vacuum Lines Sizes To 4WD?
Time to replace the aging vacuum lines to the 4wd and probably anywhere I can find the old rubber stuff.
What is the size of the lines and are they mostly the same?
I'd like to order a roll so I can make ones like the front hubs longer, stuff like that.
Ford 7.3L Power Stroke (1999-2003) :: Vacuum Shutoff For ESOF Hubs?
I am thinking on installing a shutoff in the vacuum line that supplies the hubs so I can use 4LO for backing uphill with a trailer without having the hubs engage. Its either that or a switch to disable the PVH solenoid.
View 12 RepliesFord 7.3L Power Stroke (1999-2003) :: Vacuum Pump Running Constantly?
My vacuum pump I noticed is running constantly and also my vents are stuck on defrost.
I narrowed it down by taking off the lines going from the tank to the 4x4 solenoid and the tank to the HVAC line. If I plug both lines I get pressure to both but it still won't shut the pump off. Why won't the pump shut off? Leaky tank?
If I plug the red line back into the solenoid I cannot get pressure to come out of the HVAC line. (Switch in cab set in 2wd)
I can make the pump shut off by plugging the main inlet to the pump.
I took the tank out and can't find any cracks or leaks. Could something inside the tank be broke?
Also why can't I get pressure when the red line is plugged into the selinoid?
I can't figure it out. Almost seems like the 4x4 solenoid and the tank are both the problem.
Subaru - Outback :: 1999 - Lights And Selection Won't Work Intermittently - Vacuum Leak?
My 99 Subaru Legacy Outback has an issue w/ the air/vent/defroster selections. The lights sometimes don't lite up and when that happens, the selection doesn't work. It sounds like the fan is working but the air is not coming out. If it's a vacuum leak, can I fix it by finding a leaky hose or is it an involved process?
View 1 RepliesFord 7.3L Power Stroke (1999-2003) :: 2002 - Vacuum Routing From Pump To Hubs?
I am in the process of replacing the complete front end on my 02 CC 4x4. Im replacing the hubs the lockers all seals and spindle axles. complete brakes with power stop and stainless brake lines ......I am going to switch back to the original automatic lockers. I am curious if has a simplified one line for the vacuum routing from the pump to the hubs?
View 7 RepliesFord 7.3L Power Stroke (1999-2003) :: PCM Gone Bad / Vacuum Pump Is Also Making A Loud Noise
I think my pcm has gone bad. My wait to start light won't come on an when I turn my key on I can't hear my fuel pump cut on anymore. My vacuum pump is also making a loud noise.
View 10 RepliesFord 7.3L Power Stroke (1999-2003) :: Backup Lights And Vacuum Pump Not Working
My 16 year old F250 4X4 diesel has developed a problem with no backup lights working, and the vacuum pump is not getting power. The fuse (#28) checks out OK, and I'm told to check for a broken wire on or near the backup switch. I don't know where to locate the backup switch. I have the huge Ford Service manuals, but they are written with the perspective that you should already know where the switches are. Where to find the switch?
View 4 RepliesFord 6.0L Power Stroke Diesel :: Vacuum Leak Under Dash?
I found out by accident that my vacuum pump is now running all the time. It's not the gray line to the heater valve and it's not the vacuum canister as I already checked the easy stuff. I need some direction where to start looking under the dash as I have never been under that part of my truck. Any common issues or where to look?
More information: The pump only runs all the time when the HVAC control is set to OFF or MAX AC.
Ford 6.7L Power Stroke Diesel :: Brake Vacuum Pump Oil Leak?
Haven't found any other useful info on this, but local dealer says that's where my truck is leaking oil from, and since it's considered brakes not powertrain the repair won't be covered under warranty ...
Backstory goes : dropped my truck off at local dealer Thursday to repair an oil leak from near front main seal area of the engine discovered while inspecting to initiate a bumper-to-bumper warranty through Ford ESP- their platinum warranty. I figured with all the electronic widgets and non-powertrain stuffs on this beast I wouldn't mind paying for 3yrs/36k miles of trouble-free motoring, y'know?
Apparently it's the O-ring on the brake vacuum pump that's allowing engine oil to leak. I can't even find this thing, just looking for some further explanation. I'm keeping an open mind so far, I don't suspect the dealer's just trying to get one over on me, just trying to be good and educated before I go plunk down for the repair.
Ford 7.3L Power Stroke (1999-2003) :: Will Cluster From 2003 6.0L Work In 2002 Model?
I have a 2002 7.3L Screw 4x4. Will a 03/04 6.0L instrument cluster work in this truck? The 2 clusters appear identical. I put the 6.0 cluster in and the trans temp, and coolant temp gauge will not work. All the gauges sweep when it is powered on, but the coolant and trans temp lay flat, and the check gauge light is on. All other gauges and functions work. When I put my other cluster in, all gauges work fine. Is there a difference in the VSM, PCM, or the SCP communication?
View 6 RepliesFord 7.3L Power Stroke (1999-2003) :: A/C Won't Work At Idle?
I have a 99 f350 and my a/c does not work at idle at highway rpm it blows cold. but once i let it sit and idle even on 1300rpm high idle it will now blow cold. it blows hot untill i rev it up aroung 2000rpm or drive down the road. I have charged the a/c system it has the proper about of refidgerant in it compressor gap is correct. Is it supposed to be like this? If not what are some things to check?
View 14 RepliesFord 7.3L Power Stroke (1999-2003) :: 2003 F350 - Oil Leak When Parked After Running
I have a 03 F-350, 7.3L. There is a slow oil leak that only leaks after I've run the truck. In other words, it doesn't just sit and leak overnight. I'll park it after running, and the next morning I'll notice a small pool of oil, approximately 2" in diameter. The leak appears to be coming from the oil pan area. I degreased the entire oil pan area to get a better visual of where the leak is coming from. I can see oil trailing down the front of the oil pan and the rear of the oil pan. Does this sound like the gasket? Or, what else could it be? I'm praying its not as bad as I think and need to replace the gasket.
View 3 RepliesFord 7.3L Power Stroke (1999-2003) :: 2002 - 305-75-20 Tires Work On 4x4?
I want to put 305-75-20 on my stock f250 4x4 will they work?
View 1 RepliesFord 7.3L Power Stroke (1999-2003) :: High Idle Won't Work?
I have a 99 f350 and I can't get my truck to kick up the idle when it's cold out. There have been mornings in the negatives and still nothing. I replaced my egr tube and cleaned the exhaust pressure sensor. My exhaust back pressure valve opens and shuts while driving at slow speeds but not while at idle, but I don't know if that's related. I replaced the oil temp sensor with a ford motorcraft one. And I plugged my intake air temperature sensor into a buddy's truck with the same motor and his truck still idled up no problem.
View 14 RepliesFord 7.3L Power Stroke (1999-2003) :: Boost Leak When Hit 24.5 Psi?
This was briefly discussed as part of another thread. It appears that I have a boost leak when I hit roughly 24.5 psi. The leak seems to stay for a few minutes after showing itself, but then I'm able to produce boosts up to 24.5 again. For example, on my 20-mile/30-minute drive to work, I can make this leak "appear" four or five times, maybe more if I try. Does this self-healing leak ring a bell? I haven't done a boost leak test yet, but I'm leaning towards the RTV sealant at the OEM plenums due to the self-healing attribute.
To add a little info to this thread, I recently installed an S&B intake, 4" exhaust, bellowed up-pipes, RR billet wheel, RR CAC intercooler boot kit with new clamps, RDP reinforcing plenum inserts, AIH delete plug, and I removed the wastegate solenoid along with the red and green tubes. I don't have any gauges, but I recently began monitoring the boost using FORScan. Before all of this, I don't think I was producing enough boost to cause this leak, and I had no way to monitor for this leak.
Ford 7.3L Power Stroke (1999-2003) :: Big Fuel Leak?
Brothers of fte. I reach out. Tonight it appears I had a fuel bomb under the hood.
I've been chasing a fuel leak. Replaced fuel drain orings but one screw seemed to not snug up. Also the plastic was so brittle I couldn't replace the inner oring. Installed new valve worked great. A week later noticed new slow drips. Replaced fuel filter. Again good for two weeks.
Tonight pulled into the driveway hopped out immediately smelled diesel. Steaming from under hood. Popped the hood and everything was wet. Moved her to the street and it clattered like I was running out of fuel. Still half a tank though. Hosed of the drive. Popped hood again fired it up easily. Started fine. No noticeable leak. But everything is wet from fuel. Insulation on hood was saturated. When I open the hood fuel ran out of the insulation into the air intake. Batteries were wet!
Alright what gives? Do I have to be under load to see this leak?
Ford 7.3L Power Stroke (1999-2003) :: Oil Leak In Valley - Fix?
I've developed a large oil leak in the valley. My guess is the EBPV. What's it take to fix the leak if I DONT remove the valve?
There's a good chance I'll just take it to my works fleet dept and tell them to fix it.
Ford 7.3L Power Stroke (1999-2003) :: HPOP Leak Repair?
Do I have to remove my fuel filter and bowl to attempt a repair on my HPOP leak?
View 6 Replies