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Why does the brake pedal on a Volvo 850 turbo go hard when coasting downhill in 'Drive' gear?
Simply put, most likely the brake booster is losing its vacuum for whatever reason.
On a turbo, this could be caused by lower intake vacuum as a result of high back-pressure from the idling turbo - which could be caused by a failing turbo or pressure regulator. Checking for boosting on lower-than-expected-loads would tell you if the boost regulator is to blame. Checking the turbo back-pressure is trickier, but you should notice lower fuel economy at lower loads.
However, you really should check the simple things first:
Jack the back of the car up as high as you can while it is running... check for vacuum problems at the brake booster - it is possible there is water in the line preventing vacuum from building up.
My Volvo 850 does this sometimes as well... and it is not a turbo.
Lastly, you could have the beginning of a brake booster failure as well... but then you should notice a hard pedal more often.. not just when going downhill.
What else can I help you with?
How do you fix a auto trans it go in drive and stuff its just like if you put it in Nutruel it still goes?
Its called coasting try using your brake
Does coasting downhill with the manual shift transmission cause any problems?
Coasting downhill in a manual transmission can lead to a few potential issues. Firstly, it may cause unnecessary wear on the clutch if it's disengaged for an extended period, as it can result in slipping. Secondly, coasting in neutral reduces engine braking, which can lead to decreased control and increased brake wear as you rely solely on brakes to slow down. Lastly, it may also reduce fuel efficiency benefits since many modern engines cut fuel to the injectors when in gear and engine braking is applied.
How do you brake safely while traveling downhill?
To brake safely while traveling downhill, apply steady pressure to the brake all the way down the grade.
When parking downhill its best to?
keep hand brake
When parking headed downhill its best to do what?
keep hand brake
When parked heading downhill it is best to?
keep hand brake
Where is the brake swith on a Volvo 940?
at the brake pedal behind or on top
What type of Brake Fluid in 81 Volvo?
My Chilton Volvo repair manual ( 1970 to 1983 ) shows ( DOT 4 brake fluid )
How do you get enough speed to brake the snowballs?
you slide downhill over the ice.
Where is the brake light relay located in a 1991 Volvo 240?
The 1991 Volvo brake light relay switch is located beneath the drivers side dashboard. The brake light relay switch will be above the brake pedal.
Changing brake pads and rotors on a 2000 Volvo v70 xc awd?
how do you remove the rear brake rotor on a 2000 Volvo v70 awd
How do you free stuck front brake on Volvo?
The best way to free a stuck brake on a Volvo is with a caliper spreader. You can find one at an autoparts store or dealer.
