Compression Ignition Addict
Join Date: Mar 2008
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Vacuum Pump? Vacuum Distribution Block?
So here is whats going on. Brakes pedal is hard to press once the truck is started, it returns to normal after 30+ seconds or a short distance of driving. I immediately thought it was the vacuum pump but I replaced it last week for a brand new one before this issue even started. Maybe I got a bad vacuum pump?
My next two guesses are either the brake booster is going bad or the vacuum distribution block is clogged, cracked etc.
Can the vacuum pump be tested and if so what kind of numbers should I be seeing? I took the hose off of it and stuck my finger on it and it seemed fine.
Any thoughts or has this happened to anyone before?
04 F350 With all the mods.