Old Goat
Full Access Member
I went through the same thing on my 86.
Checked vacuum with a gauge, and checked out fine.
Push peddle and vac would drop, release and hit again and
really dropped.
Took Pump a while to build back up.
Driving the truck and one application and she would slow down, 2nd time and like no vac.
or like pushing on a brick.
next time would be kind of ok.
Took it to a shop. they went through everything, Pads, Rotors, Drums, shoes etc....
Pick up truck and said they could not find anything wrong...good Vacuum etc...
leave shop, at corner intersection...no vac assist...
Things narrowed down to the Pump, so replaced it. I did keep it just incase that was not it. I have a shop full of just in case parts... still the same thing.
I did notice a HISSS from under the dash when pushing peddle in slightly, and was told it was normal to do that.
I finally replaced the Brake Booster, and that was the problem. They have never worked this good in the 131K miles and almost 8 yrs of care giving her.
I think this is the 4th one that has been replaced. Finally have one that will just about put my nose on the Windshield.
These so called Rebuilds from O`Rielly`s are a crap shoot,
Goat
Checked vacuum with a gauge, and checked out fine.
Push peddle and vac would drop, release and hit again and
really dropped.
Took Pump a while to build back up.
Driving the truck and one application and she would slow down, 2nd time and like no vac.
or like pushing on a brick.
next time would be kind of ok.
Took it to a shop. they went through everything, Pads, Rotors, Drums, shoes etc....
Pick up truck and said they could not find anything wrong...good Vacuum etc...
leave shop, at corner intersection...no vac assist...
Things narrowed down to the Pump, so replaced it. I did keep it just incase that was not it. I have a shop full of just in case parts... still the same thing.
I did notice a HISSS from under the dash when pushing peddle in slightly, and was told it was normal to do that.
I finally replaced the Brake Booster, and that was the problem. They have never worked this good in the 131K miles and almost 8 yrs of care giving her.
I think this is the 4th one that has been replaced. Finally have one that will just about put my nose on the Windshield.
These so called Rebuilds from O`Rielly`s are a crap shoot,
Goat