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Ron
Ron, ASE Certified Technician
Category: Hyundai
Satisfied Customers: 33443
Experience:  35 year in the Auto repiar business ASE Certified
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I drive a 2004 Hyundai Elantra, my car drives great! New

Customer Question

Hello , I drive a 2004 Hyundai Elantra, my car drives great! New breaks fresh oil change , once in a while my car brake becomes very stiff and then won't accelerate past 20mph, I'll turn the car off & on, then it's back good as new, I am extremely nervous that this problem will happen on the highway, and I could get in an accident . Please help :((
Submitted: 9 months ago.
Category: Hyundai
Expert:  Ron replied 9 months ago.

Hello and thank you for your question,

The problem you are describing can be caused by any of the following, with a misadjusted brake booster push rod being being the most common.

  • Brake Booster
  • Brake Booster Pushrod
  • Hydraulic Brake Fluid
  • Master Cylinder

    In order to determine which on is causing the problem have you mechanic do the testing I have enclosed in the link below. Copy and paste the link to your browser to open and view it.

    https://dl.dropboxusercontent.com/u/104923897/Break%20Mar%208.pdf