a vacume leak, spray carb cleaner around the eng while running to locate the leak, may even be the booster itself
One possiblity could be the power brake booster is shot. When you apply the brakes it creates a large vacuum leak, enough to stall engine.
It could be a leaking vacuum hose to the power brake booster or the membrane in the booster could have a hole. When the brakes are applied, the booster is opened to the engine vacuum via the hose. The vacuum leak would then increase, causing the engine to stall.
It is impossible to give error free diagnosis online but your power brake booster or check valve could be defective It is impossible to give error free diagnosis online but your power brake booster or check valve could be defective. This will casce engine vaccuum to drop when brakes are applied causing the engine to run lean. This causes rough idle and stalling. Car should run ok until brake are applied
This sounds like vacuum leak in the braking system. Check for disconnected or cracked hose from the engine to the brake booster in the engine compartment.
Need to know the year and what it is in.
Does this happen when you come to a complete stop or while you are coming to a stop? Is this Truck Automatic or Standard? Brake booster could be something, Torque Converter Clutch Valve not disengaging(Automatic).
The EGR valve on a 1994 Chevy 1500 is located on the top of the engine. If the valve becomes stopped, the engine could idle rough or stall.
Need to know the year and make, It would help answer.
how to in stall a Quarter Window in a 98 Chevy blazer
Stalling at idle? Immediately after starting? While driving? While stopping? Cold or hot engine? What engine do you have?
The power brake vacuum booster is failing.
because they dont big enough anti-freeze tanks