If the booster rubber diaphragm or system check valve are damaged this will provide an unwanted path for the engine vacuum to leak out. First make sure your 4 corner idle mixture screws and curb idle speed are set properly.
Why Does My Car Stall Occasionally Www Carsales Com Au
Engine stalls when braking hard. Stalling can also happen if there is a brake line obstruction either by a chunk of rust or a pinched brake line. Air in the brake fluid from a hole in the system can prevent proper pressure to the brakes. I have set the float level from bottom of the sight glass to 34 with no apparent change. Under hard braking revs would drop 4 500 rpm. I suspected fuel sloshing from the rear bowl and flooding the engine so i connected both bowl vents with a piece of fuel line. Then adjusted the primary float level up 2 flats loosen the locking screw and rotate the adjusting nut counter clockwise 2 flats this has significantly improved the situation.
During hard braking the rpm drops and stalls. Engine stalls when brakes are applied when the brake booster is failing it can draw excess vacuum from the engine. Engine stalling problems can be hard to find and are often sensor or temperature related. If it doesnt stall then its time for a new booster. If your brake pedal is stiff and it stalls when you apply the brakes it sounds like the diaphram in you brake booster may be ruptured. The car runs fantastic in all rpm ranges.
Chevy trailblazer stalls when stopping or braking hard refers to when the engine stops running as a result of applying the brakes and coming to a stop. The brakes are then pressed the engine feels like it will stall and the idle can drop. 274 0 0 0. Thus causing the same thing as an intake manifold leak. The car may also stall due to a vacuum leak in the anti lock brakes system. Common symptoms of stalling when stopping.
Do what steve said and pull the vacuum line to the booster and cap it off and see if it still stalls. Engine stalling is more likely to occur during cold weather or when starting a cold engine. This occurs when the diaphragm inside the brake booster fails and allows air to bypass the seal. So this kind of engine stalling problem often means the engine is not getting enough fuel andor too much air. The only issue is stalling.
Gallery of Engine Stalls When Braking Hard
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