themontajew

So my truck just sat for about 6 months without insurance (I'm in school, and don't need to daily drive so I didn't want to spend the money on insurance last winter) and did everything I thought I needed to keep the thing good (I'm also a huge tard so I'm not sure on that one) the only issue I'm having is now when I drive, the first time you put on the brakes, they feel fine, but if you let off and press down again they get hard as fawk to press down, like the brake booster has failed. The wierd thing is once you gas it for a bit again, you get 1 time of the booster working well, but when you go to like feather the brakes it feels like the booster goes out again. I don't know dick about it, other than it's a vacuum boost system, and literally everything but the booster is new.

Are these signs of a booster issue or like a power steering pump issue??

Thanks fore the help, I'm a total noob/ tard

infidel

The vacuum pumps on the vacuum assisted brake trucks like yours are notorious for not being able to keep up with repeated braking at idle.
Power steering has nothing to do with your brakes.
Could be your idle is too low or you have a vacuum leak that could be anywhere in the system.

Hodge

Mine does similar to that- as Infidel said, if I pump the brakes repeatedly, it takes a minute for the vacuum to build back up.
It doesn't sound like it did this before you parked it- you should probably trace and check all your vacuum lines. Sitting and lack of use could have agravated dry rotting hoses, varmints could have chewed a hole in a line, something could be loose. It's probably a good time to learn more about your truck.

themontajew

That sounds allot better than dealing with replacing the whole pump. I'm thinking I'm just going to go through and replace all the hoses for good measure.

Yea, this truck has been 1 big learning process for me. Basically figured out how to drop the motor in and get the NV4500 to work after having an auto, without much of any help. I just replaced a blown lift pump, and now it looks like it's time for vacuum line I guess.

SIXSLUG

Well then, you're not a total tard

joem

my 95 does the same with my low 500rpm idle, after pressing the brakes once at idle I loose my boost (man I had to re-word this three times to be G rated)
Makes it interesting when backing heavy loads...
Wowie, way to much pun

infidel

If you insist on braking a lot at idle you can install a vacuum reservoir tank to help.
Easy to make with some 4" PVC pipe with a cap glued on each end.
Just drill and tap one port on the pipe and connect it to any vacuum hose in the system.
Biggest hassle is finding a place to mount it.

Dodge used to sell a reservoir kit for these trucks for $150 that was just a flat plastic tank that attached to the radiator mount and one hose.
Total ripoff, it was worth $10 at the most.

SIXSLUG

^^^That's a great idea, the reservoir on my old Pontiac was a sealed coffee can with a port for inlet and outlet.

There's all kinds of room in front of the rear wheel wells, just need more hose.

toadfather

Same problem with my '95. Changed front rotors, disks, calipers and master cylinder, rear wheel cylinders. Vacuum pump pulls 22.5" at 750 rpm idle. Check valve tests good and booster resevoure seems to hold fine for 3 assisted applications of the pedal w/engine off as chrysler manual states. Hate when things won't work the way i believe they should!

infidel

It only needs one port. Under the truck is a good idea.
If you have 4wd you could just tee into the vacuum line going to the transfer case.

SIXSLUG

One port...that makes sense, must of remembered it wrong!

RoadDiesel

I come down a steep long hill in the black hills, just before the cabin..I will add the vacuum box like infelel commented..I need somthing! OK..here is what I do in the meantime..I take it out of gear and rev the engine up..that gives me the brakes I need for the down hill travel..anyone have a photo of the box infedal is talking about???

Don T

I have seen a lot of the older cars have an apple juice can mounted on the inner fender . have made up a couple myself.

infidel

Try this> http://www.amazon.com/Mota-Performan...sim_sbs_auto_1