Vacuum pump & intercooler connectors ?s - Ford Powerstroke Diesel Forum
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Old 10-30-2007, 03:18 PM
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Vacuum pump & intercooler connectors ?s

Howdy guys,

1st I'd like to thank Andy for the site-great lay out and friendly. Way to go!


Truck is an early '99, actually built Dec. '98, 153K miles.

Vacuum pump? AC/heater has only been blowing out the defrost for quite some time. Is that the vac. pump and is that the small pump on passenger side with 1 electrical connection and a dual tube vac. connection?

Also, my rubber/silicone intercooler connections seem to be either leaking from loose clamps or they're shot. Do you guys replace these rubber boots or just clean up the area and tighten the clamps?

I bought this truck 5 years ago with 90K, from a Ford dealer, so I'm just getting into the maintenance stuff other than fluids/filters.

TIA


Bottom entry for update on new part #s for vax pump....

Last edited by jackpine savages; 11-02-2007 at 02:55 PM. Reason: Update on $$$ savings for you!
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Old 10-30-2007, 03:30 PM
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The intercooler boots will have oil seepage thats normal as the crank case is vented to the intake side of the turbo. It wouldn't hurt to snug them down. I can't help on your first question. Welcome to powerstroke.org!
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Old 11-01-2007, 10:12 AM
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Quote:
Originally Posted by vitalidle View Post
The intercooler boots will have oil seepage thats normal as the crank case is vented to the intake side of the turbo. It wouldn't hurt to snug them down. I can't help on your first question. Welcome to powerstroke.org!

Howdy vital. Thanks for the welcome. I'll tighten the clamps on the boots and keep researching the vac pump, I guess. Am I looking in the wrong area here in the Forums?
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Old 11-01-2007, 10:19 AM
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Pull the glove box out and check all of the vacuum connections under the dash. I found two hoses hanging loose and it caused the defrost only to work. I had to play with where to plug them in but I got it. I can't tell you much more, that was 5 years ago.





Keep Strokin'
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Old 11-01-2007, 12:03 PM
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It sounds like the vacuum pump in question. It should run to maintain a specific vacuum level in the reservoir (nearby black plastic container looking thing) next to the battery. It should run periodically to maintain vacuum levels for operation. Sounds like you have a vacuum leak (ventilation defaults to defrost with no vacuum). If the pump is running then you have a leak and it can't keep up. If it's not running then you either have a bad pump or fried the pump with it trying to keep up with a leak.

Hopefully this helps a little.
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Old 11-02-2007, 11:55 AM
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Ok, thanks for all the replies and assist..

Dropped g-box;everything's hooked up that I could lay eyes on.


Vac Pump is not running at all; checked electrical connection and it's solid, but I can't pull the vac. line off the unit? Part #s on the pump are

8TO 003 953-10

ANd F81H ZA451-AC Hella

Fuses all good. All vac lines I can see are good with no holes. I'd go for a new pump but I can't get that one connection off. Hmmmm...at least elimination process is further along-Thanks all.
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Old 11-02-2007, 03:01 PM
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Vac pump Part #s' for $50 savings!!!

Powerstrokeshop.com


That's the 5x updated part #, from Ford dealer, I paid $148 and PSShop has it for $98. Part # was not listed at PSShop, as parts counter guy said, Ford has changed this part # 5x.

Installed new pump and still a "no go" on getting air to work at feet, and new pump doesn't seem to be working either. Change the resistor too?

Part #/description on receipt; Pump Asy 6C3Z*2A451*A

Onward to PSSHop.com to look for a new resistor...
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Old 11-06-2007, 06:06 PM
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Vacumn problem

I'd put money on the vacumn sending unit just right of the vacumn pump, on the fender right behind the battery ,it controls the 'Auto Hub feature, I have replaced 3 of then. the last was a updated version in 2007. Ford cost about 42.75 if your lucky. It is an OEM part. When it stops working the defrosters go to defalut mode and none of the switches will change that.
Good luck.
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Old 11-07-2007, 09:02 AM
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Quote:
Originally Posted by rsecondchance1 View Post
I'd put money on the vacumn sending unit just right of the vacumn pump, on the fender right behind the battery ,it controls the 'Auto Hub feature, I have replaced 3 of then. the last was a updated version in 2007. Ford cost about 42.75 if your lucky. It is an OEM part. When it stops working the defrosters go to defalut mode and none of the switches will change that.
Good luck.
Thanks secondchance, I'll eliminate that possibility next with an order through PSShop. You've replaced THREE of em?! Holy canoli.

When I asked about a resistor, that was incorrect as I was thinking of the Chilton's manual I was looking at, and the resistor for the blower motor which is in the firewall. (The blower works just fine.) All the fuses looked good-funny how when one thing goes you end up doing a check to take a closer look at EVERYthing in the truck.

On the bright side; Trucks only got 150K on her, but I plan on having her at least another 350K. So far I have a spare/rebuilt alternator and now probably a good vacuum pump that I replaced with the new one. Spares are good for the road dog's soul, eh?
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Old 11-15-2007, 11:00 AM
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Well, the vacuum solenoid wasn't the fix either. Thanks anyway to Ben at PSShop for the effort. Now, I guess try the actual blend actuator mechanism itself? Anybody have one of THESE go out? Onward...full o joy.
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