Question about 1991 GMC Sonoma

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Stiff brake pedal

I just installed a 3 in lift and now i have stiff brakes and idles funny{high}

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  • Jason Dejager
    Jason Dejager Mar 21, 2014

    Hi Nick Schneider, I want to help you with your problem, but I need more information from you. Can you please add details in the comment box?

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Sounds like there is a vacuum leak, a vacuum leak will cause your engine to run lean, that may cause your idle speed to increase, , check the vacuum line that goes from the rear of the engine to the power brake booster, it may be the brake booster as well, ether of these will cause hard braking, hope this helps.

Posted on Mar 31, 2014

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6ya6ya
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Posted on Jan 02, 2017

yotaguy
  • 232 Answers

SOURCE: Power brakes feel stiff like manual

Your having a problem with the vacuum booster,check the hose connection at the booster,if the hose is fine the diaphram in the booster is leaking and about to fail.

Posted on Apr 20, 2009

  • 116 Answers

SOURCE: Vacuum line leak

sounds like cruise control cutout switch but dont give me bad rap if i didnt have enough info.

Posted on May 20, 2009

HellPoolHall
  • 74 Answers

SOURCE: brakes just dont seem right..

If the vehicle has rear drum brakes, I would check the adjustment on them, if they are too loose, this will cause the brake pedal to go down low.

Posted on Aug 07, 2008

  • 1 Answer

SOURCE: trailer brake controller problem

I found the problem. Talking with a technician from the controller company, we determined that it was a fuse problem. I found that the fuse to the CHMSL was blown.


Posted on Jun 30, 2009

litoshop
  • 298 Answers

SOURCE: brake pedal goes down to far abs brakes

Hi I'm litoshop if you bled the system and get no results then your brake pump needs to be replaced now before replacing make sure your pads are installed correctly because if there not this to can cause this problem good luck. if this information has been useful please let us know thank you.

Posted on Aug 11, 2009

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IMPORTANT NOTE: You need using diagnostic equipment connected to the data link connector of the car in order to bleed the ABS block. Follow instructions by scantool equipment for bleeding the ABS block.


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7. Push the brake pedal firmly for 4 - 5 times to the floor, and maintain the brake pedal pushed to the floor, engine idling.
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IMPORTANT NOTE: All the time check the brake fluid level in the brake system reservoir, and fill up if necessary!

10. Push the brake pedal firmly for 4 - 5 times to the floor, and maintain the brake pedal pushed to the floor, engine idling.
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