Car will not accelerate properly

2005 HYUNDAI TUCSON
200,000 MILES • 6 CYL • 2WD • AUTOMATIC
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TBCSCOACHC
  • MEMBER
  • 1 POST
Only a slow acceleration is possible as the car bucks in first gear. At high speed the vehicle, will bog down going from fourth to fifth gear and feels as though I have flooded the carburetor. If I carefully bring the car up to speed, it will perform very well until any upward incline.
Thanks
Jun 13, 2019 at 7:57 AM
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ASEMASTER6371
  • ✓ASE Certified Mechanic
  • 52,796 POSTS
  • ASE Certified Mechanic
Good morning,

This sounds like you have a clogged catalytic converter not allowing the engine to breathe.

https://www.2carpros.com/articles/bad-catalytic-converter-symptoms

You need to have the back pressure tested to be sure. That is when they remove an O2 sensor and insert a gauge to measure the back pressure.

https://www.2carpros.com/articles/symptoms-of-low-engine-power

Roy
Jun 13, 2019 at 8:06 AM
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