I doubt its a tank pickup problem cause there should be enough fuel in the float bowl to get you through the braking. If you're using a Q-jet do you have that plastic baffle/spacer that drops into the front of the bowl? If you do then I'd recommend checking your float setting. I think the fuel is sloshing to far foreward and letting the jets suck air making it lean out and stall.
just for the hey of it.....I had a ford Ltd use to do that constantly ...use 2 play with it always,could never figure it out........had a smart guy figure out it was the brake booster with a vacume leak problem...
On the q-jets I've seen there is a black, hard, plastic part that drops into the front of the bowl where the float sits in the fuel. It helps to keep the fuel from moving around to much so if the car is braked hard the fuel doesn't run to the front and leave the jets, which are at the rear of the float bowl, open to the air. Or if the float is too low it could be doing the same thing just because there isn't enough fuel in the bowl to keep them covered. Unfortunately you have to take off the air horn to check this stuff which may seem a little daunting if someone isn't very knowlegable about q-jets as you've described yourself.
Yea, that does sound a little daunting steve. :error: That sounds right up my alley as I don't have much vacuum to play with to begin with with this cam.
Naaaaah! Easy as pie...unhook the choke rod at it's top from the choke butterfly, get a finishing nail, and drive the accelerator pump pin towards the middle of the carb until it's not quite touching the airhorn behind it, move the accel pump arm out of the way, unscrew the air cleaner hold-down threaded rod, then remove the front carb-to-manifold bolts and the 7 (I think) screws holding the airhorn onto the main body, and GENTLY lift the airhorn up until everything clears, then you'll have to rotate it to unhood the link to the secondary butterfly. Installation is reverse of the above. I've got the same problem, but I KNOW my float height is right, etc. There are different shaped floats, I need to get one with more float "flotation" material at the front to fix mine. At least, that's my next step...
