I have a 1994 gmc safari van.not every time but often when i release gas pedal and apply brakes specially to a full stop my engine stalls.but when at park idling seems fine.changed spark plugs ang adjust timing.
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Better have the fuel pressure checked for starters. Even though the pump comes on, your fuel pressure might be too low. Lots of GM vehicles are finicky about proper fuel pressure, especially at start up. It could be a weak pump or failed fuel pressure regulator-a pressure test will sort it all out.
see when you say you step on it, and the vehicle stalls, it sounds as if it bein starved of fuel...you step on it, and therefore the demand is there, but not the supply. to prevent itself from over heating, the fuel pump shuts off...after a moment of cooling off, it fires right back up...get it checked at your mechanic...do the strainer on the bottom of the pump, and fuel filter as well...is it time for a tune up yet?
By "sticking" I am assuming that you mean that the brakes are staying applied (calipers are not releasing)and burning the brake pads and rotors up.
The most common cause of this is brake hoses.
The hoses that connect your calipers to the steel brake lines have an inner lining and a reinforced outer "shell". sometimes the inner lining tears loose from the outer shell inside the hose. (It cannot be seen by "looking" at the hose.) The inner lining then starts to act similar to a "heart valve" where it allows fluid to be pushed down into the caliper, then collapses inside the hose, blocking the fluid from returning to the master cylinder when the pedal is released. This can happen just because of the age of the hose, but is more commonly caused by someone allowing the caliper to hang by the hose while replacing the brake pads without using anything to support the weight of the caliper.
To diagnose this condition, raise and support the vehicle and remove the wheels. Make sure that the transmission is in "Park" (Automatic Transmission) or "Neutral" (Manual Transmission) and apply the parking brake. Then start the engine and apply the service brake. (Press HARD on the pedal) Shut the engine off, release the service brake and open the bleeder screws on the calipers. If brake fluid squirts out of the bleeder screw under pressure, then the hoses are the cause of the calipers not releasing.
check Brake line above Gas tank i own a 1993 Gmc van to brakes were doing same thing didnt appear to be fluid on grown but when lifting it up and sticking hand up on tank you could feeel the line rusted threw Gmcs Are known to leak rite above gas tank