09-30-2010, 01:18 AM
Hey all my dads 06 has decided to throw only defrost with heat (its almost October in Montana and we are dieing for AC still). From going through articles from a year ago i remember the fail safe for a super duty was defrost and heat. We are still looking for a fuse for the vacuum pump because when you unplug the lines you can not feel a vacuum anywhere. I was wondering next if the 4wd and brakes were on the same pump still or if they use a different pump because they still work. Any ideas?
09-30-2010, 01:37 AM
Get a meter/ test light and check for power. Pumps going out are not uncommon but also check the lines for leaks etc once you get it opperational.
09-30-2010, 01:51 AM
Just got in. I got voltage to the pump, i dont hear the pump running or feel it, i probed it and got no continuity in the pump. Im betting its the pump now. Know the best replacement pump?
09-30-2010, 01:52 AM
ford factory pumps.... easy to replace...
09-30-2010, 11:52 PM
ya easy to replace and common.
10-03-2010, 04:30 PM
well i got one from napa because they were the only one within 100 miles with one in stock. I put it in and nothing. not till this morning did it work. I used a hand pump and got the vacuum down to 10 and the vents started working. I pulled the napa pump apart and the pump wont even pull enough vacuum to shut its self off. Also the diaphragm for the the cut out leaks like a son of a gun. At least it has a year warranty and they can have one in a week. Ill let it run and see if it does burn out in a week. if this one fails i think im gonna call george at the stealership and get an OEM one coming. Tired of the NAPA b.s. Also where is the vacuum controled heater control. It is fed by a translucent grey line and it is just dangling by the oil fill. It doesnt seem like anything is loosing vacuum there but other posts said they have knocked it off before. I still cant find where it goes.
10-03-2010, 07:24 PM
There is a diaphragm valve on top of the right valve cover, that runs in line with one of the two heater core hoses. That is where the grey vacuum line goes. It turns off coolant flow to the heater core for Max A/C.
10-04-2010, 12:40 AM
This way?? i hope
10-04-2010, 02:46 AM
How to: Replace your electric vacuum pump - Powerstroke Nation (http://powerstrokenation.com/forums/showthread.php?t=27533)
10-04-2010, 02:49 AM
Yep, you got her.
This way?? i hope
10-04-2010, 03:19 AM
Thanks Jeremy! well got that issue solved. just gonna get an oem electric pump now to replace the napa POS that cant even pull enough vacuum to shut itself off. (i plugged the pump to itself and it pulls 12.5 and the shut off is 13. fords could pull 17 i was told and the burnt out one tested is shutoff at 14.) Im thinking this summer since we ran Max AC a ton and that line was disconnected that maybe it killed the pump.