Hard Brake, Engine Stops

stall
engines
brakes
#1

Hi Everyone,



I have a 2003 Ford Escort, that’s not the problem…the problem is when I’m going around 40-45 miles on a surface street and when I step on the brakes really hard for a hard stop, the car engine dies. It happens about twice a week. The engine starts off fine when I try to restart it. Do you know the cost of this? My Air Filter was just replaced a month ago, had an oil change at the same time. I was having trouble with a hole in my Master Cylinder but that was replaced also about 9 months ago. Any ideas?

#2

Does the engine run OK otherwise? Does it idle smoothly? Any other symptoms?

#3

If it does run fine otherwise, then there’s a good chance you’ll be moving from the master cylinder, now to the brake booster.

Although, what is the significance of the 40-45mph? Does it not do it if you are up well over 40-45? Or is it really just a matter of hard braking?

#4

Thanks for the reply!

Yes it does run smoothly, there is no other symptons that i can tell, just that it stops, the battery’s fine also. The radio stays on and the lights too.

#5

Thanks for the reply!

It was just an example, but at any speed when I do have to brake hard the engine does stop. It’s just the hard braking.

#6

Given that, there is a good chance that your brake booster is failing. The car uses engine vacuum to help the brakes work - when you hit the brakes hard it is likely opening up a rather sudden and massive vacuum leak.

Check this out:

#7

I once drove a Ford van that would die under hard acceleration. Turned out to be a loose electrical connector.

#8

Thanks to everyone! I’m gonna have my mechanic fix this problem.