Hard Brake Air goes to defrost

[Uhohspaghettios]

I changed the coils in an 06 Limited and immediately following that the brakes are very hard and the air comes out of the defrost vents. That's got to be some sort of a vacuum screw up on my part but I have no clue what. Looks like all the hoses got plugged back up the way they should be. Had my dad look it over to see if I missed anything and we are stumped. Any ideas?

 

[Aspen03]

Like you said it has to be vacuum, assuming hooked up correctly the next step is to find the leak, or crack that was created while messing with them. These old trucks don't like to be touched. I have 2 2nd gens. Our navigator has this issue but it occurs at part throttle while cruising and my Expedition just did it today while having the cruise set on 71 on the hwy and a slight uphill grade. I'll be purchasing a smoke machine to track these down. Easiest way to pinpoint a leak.

 

[Uhohspaghettios]

Thanks for the reply! I decided to step away for a day and see if I got lucky on the internet, back at it tomorrow

 

[Hamfisted]

Can you post pics of the engine bay of your Expy ? Particularly the throttle body area where vacuum hoses run. The hot water valve also. Are you getting a check engine light, or any DTC codes ?






.

 

[Uhohspaghettios]

301 and 308 before I changed the coils, nothing since. Will get pictures within the next hour- thanks much!

 

[Uhohspaghettios]

 

[Uhohspaghettios]

 

[Uhohspaghettios]

 

[Uhohspaghettios]

 

[Uhohspaghettios]