Just finished an EGR delete oil cooler replacement.

Video of my problem

2004 6.OL diesel Excursion. No Mods

Car started after long cranking. More exhaust smoke than previously.

Seemed to run fine. Took it for a drive. When I really stepped on the gas the engine died and I pulled over. Started up again just fine.

I did notice this vaccum type device on the passenger side which now runs as soon as I turn on the key.

There was a vaccum line that went into the top of the intake manifold passenger side. The end of it was slightly cracked when I reinstalled it.

Could the two be related?

 

If your MAP sensor tube has a crack that needs to be replaced and could be the cause of it dieing

Its a boosted moter so its has pressure

 

the pump that runs is a vacum pump

You have a vacum leak somewhere and its not relaited to the map sensor

checj the heater control for VACUM LINE

I will post a pic

 

Its the circled one that VAC line

 

BLADE thanks so much. Checked that. didn't seem to be the issue. Is there a schematic of all the vacuum lines that i could look at?

 

that Vac pump works the heater and 4wd
it goes to the 4X4 hubs and

I will see if I saved that link for the troble shoot vac lines I couldnt find a vac diagram
this from the spreadsheet



How to check for 4x4 auto lock inoperable (OR heat stuck on defrost)
"First locate the vacuum pump on the passenger side fender well. make sure it works by listening with the key on should be vibrating. Next unplug the vacuum harness at the resevoir an cover with a finger to make sure it turns off. Install a vacuum pump into the hose (the pump should pull 25+ "" of vacuum within seconds). If that is ok, then reconnect the pump line to resevoir inlet and vacuum pump to outlet to make sure the resivoir will hold vacuum. If thats good, follow lines to the ""tee"" were they split. You will see two lines ..... one goes to the front end and the other to the dash. Disconnect the lines and hook up the vacuum pump to each line, one at a time. Pump the gun to 20 "" or so and monitor for 5 minutes to insure they do not drop vacuum. 90 percent of the time the problem is the line going to the front end. If the front end is causing the problem, then jack up the front end disconnect the vacuum lines to front knuckles. Pump to around 20"" of vacuum while spinning tires to see if it drops vacuum. If either one does, then add 3-5 psi of air to the knuckle and spray with soapy water to find the leak. You can either fix the leak or cap off the line up top and run your hubs manually.
If the dash and the front end lines hold vacuum, then cap both lines off with a golf tee or equivlant.
Pump the line from resevoir to vacuum control solenoid to find the problem.
Also if the grey vacuum line that goes either to the hot water shut off in the heater hose or to the evaporator
case is hanging loose,
it should only cause a problem in max a/c.
If the problem is in the dash just keep unhooking vacuum lines and plug one end and pump the other until you find the leak."

 

I disconnected the 90 degreee at the pump, plugged it and the pump stopped.

While the pump is running I disconnected the grey line you have circled above and there is no suction on it. Having a hard time tracking where the line goes.

Any suggestions.

 

definatly have a leak somewhere

does that line get suction if you turn on the heater?? the valve should open up when you turn on the heater

I know theres a reservoir and some other stuff to it a diagram would be he ticket hopefulley someone has a link to one

 

No suction when heater on. Does truck have to be warmed up.

Would any of this make the truck die when I take it for a test run?

 

just the cracked MAP sensor line would make it not run right so far the one comiong off the intakemanafold to sensor

vac has nothing to do with why its dieing that I know of

so the defost dont work either

 

So it sniped off the cracked end of the MAP hose and reconnected it. Just took it for a test drive. Ran great and I couldn't get it to die.

Now just need to figure out this vacuum pump thing.

 

The heater and the defrost will blow air. haven't checked to see if it is actually hot.

 

cool I knew it wasnt to serious




It sounds like the vac pump is doing what it should if it will go to defrost

but make shure it gets hot that what the valve in the circled pic does lets the flow of hot coolant into the heater core in the cab

So I take it the vac pump just wont shut off now right???
could it have been a preexisting condition????

 

Look this over:

Ford Truck Enthusiasts Forums - bismic's Album: Vacuum system

 

Very professional Mark I like how you had the lines labeled