johnny89345

iTrader: (1)

i have willwood brakes all around on my dd 99 camaro ss. in the rain the brake pedal gets rock hard and the car will not stop. what could this be.

VandykeT/A

Are the pads almost wore out? My cobalts brakes done that when they were about gone.

johnny89345

iTrader: (1)

not worn at all

jam01

that would be your brake booster, check hose's and such to make sure there isnt a leak if none then replace booster.

mbaker3

Question for Jam01... why would that be affected when it rained? I'm asking because I really don't know,...........not being a smart ***.

the impaler

Don't know about the pedal pressure, but some pad compounds work very poorly in the rain. This could cause the car to not stop. The pedal pressure, I dunno, makes no sense to be rain related.

johnny89345

iTrader: (1)

i was wondering the same. how would the rain affect the booster. i was thinking it could be a short somewhere screwing the braking up

mbaker3

I can't help you out because I don't have a clue about this one either. I was following this because I wanted the answer too, just in case it happened to me. Good luck with this and if you find out please post the answer on what is causing this!

jam01

it probably has nothing to do with rain, i forgot our cars have abs while it sounds like a booster to me, i could be wrong. maybe your getting moisture in a sensor or connector for the abs and it is causing it to trigger on, like your in low traction. are any of the dash warning lights coming on when this happens? i have done hundreds of brake jobs, a vacuum leak on the booster either through the unit itself or a vacuum line will cause a hard pedal. as will the abs module kick back making the pedal feel the same way, which is why it could be the problem. check all connections and wires to all the wheels.

johnny89345

iTrader: (1)

crazy right only these unheard of problems happen in my cars and it definitly is only in the rain, never once has i acted up on any day. but literally everysingle time it rains rock hard and i cannot stop. it feels exaxtly like it would if i pulled the vacume line off the booster, and no lights come on when this happens.

kerr8806

Did you ever find the problem? I have a Jaguar XF that does the same thing.