VAC pump question

[Powerstroke 81]

I just noticed my vac pump (i think) on the passanger side finder well, it starts running as soon as i turn the key on and wont shut off, is this normal ???

[petec83]

I just went through that adventure myself except mine wouldn't turn on. It was toast, Im thinking for the same reason you have. What my pump controls that I have found is my automatic locking hubs and the front vents on my dash. Im thinking you might have a leak. If you notice there is a reservoir that the pump is attached to right in front of it. If I had to guess Id say you have a leak in the Pulse vacuum valve for your front hubs.

[Powerstroke 81]

Thanks for the info, on your pump does it have a open port?
Mine does and if i put my finger over it it will shut off for a couple seconds then start running again.

[petec83]

Yeah it does. Its a little white one with a tube coming out the neck. I went ahead and replaced the Pulse hub vacuum solenoid as well. Just to make sure I don't burn another pump.

[Powerstroke 81]

were is the solenoid located?
was the parts expensive?

[petec83]

Its right beside the pump more towards the headlight, its bolted to the fender. Im new to the forum but have been reading it for about 3 to 4 months. I took pics of them but cant figure out how to upload them to show you. How did you get the big picture of your truck on here?

[Powerstroke 81]

get a photpbucket account (free) once you upload your pics it will give you codes for each pic, take the code and copy it into you sig. on your profile.

[petec83]

So you mean I just upgraded my account for nothing?

[petec83]

Hey made the account in photobucket. Which code is the one I need? HTML or which?

[kinghawg98]

it means you have a leak somewhere. Mine did the same, then I found a line disconnected on the heater control valve (or something..)