Hello. I read a post from Mobile Auto Repair that mentioned brake pedal hissing and engine stalling while stopping. I am experiencing those symptoms and I was wondering if someone could elaborate on the situation.

1990 B250 318 5.2L

here is the post

https://dodgeforum.com/forum/dodge-r...les-rough.html

Thanks in advance!
roberson

 

Hissing sound indicates an air leak, in the case of the power brake booster it would be a vacuum leak. Check for bad vacuum lines and fittings. The diaphragm in the booster unit could be bad, but these usually last a long time. A 1990 van with some miles on it could be a likely candidate for a new booster.

 

I had an issue with pulling to the left upon braking and a slightly hard pedal. Replaced the brake line and bled system. No more pulling to the left. Within 20 miles had no pedal at all! Put on a new, bench bled master cylinder, bled the the system. Perfect for 30 miles and then no pedal at all. Re-bled the system. Perfect pedal. 40 miles later no medal at all. Is that the booster?