Wont Stay Idle/Running

[414toyz]

Please help.
This happened this morning and for the past few days.
The vehicle starts up fine but when I press on the brake pedal the vehicle shuts off.
A day ago I let the truck warm up for about 30 mins. press the brake pedal the vehicle sputters(almost shutsdown) but keeps running. Since stayed running I drove it but during the drive the vehicle restarted again.
What could be causing this?

 

[sgtpoliteness]

Sounds like maybe the brake booster is leaking internally. When you go to hit the brakes it'll cause a big vacuum leak and cause the engine to stumble and die. While idling can you slowly depress it and hear any kind of hissing
from inside the cab?

 

[414toyz]

Ill check for the hissing this evening and report back.

 

[sgtpoliteness]

Even if you can't hear it, my guess is that's what's going on. Unless someone here is aware of a more common problem on these trucks with those symptoms.

 

[414toyz]

Does the brakes need to be bleed after a brake booster change?

 

[sgtpoliteness]

If you don't disconnect any fluid lines, then no. Sometimes you can unbolt the master from the booster and sneak the booster out.


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[sgtpoliteness]

Did you hear the hissing?


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[rabbiporkchop]

Does the brakes need to be bleed after a brake booster change?

Not necessary to bleed the brakes as long as no hydraulic fittings were disconnected