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Engine losing power especially when going uphill

Tiny
MASON21
  • MEMBER
  • 2003 KIA SPECTRA
  • 140,000 MILES
My car is a KIA spectra 2003 a couple of months ago it started loosing power going up hills and moving slower, then it started revving up every time I pressed harder in the gas peddle so I readjusted the timing belt and changed the spark plugs and put a new throttle positioning sensor in but still now luck today I tightened the throttle cable and that didn't seam to work so im asking you guys what you think.
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Friday, November 25th, 2011 AT 11:59 PM

1 Reply

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Scan for codes and check fuel pressure. If that's ok then attach vacuum gauge to inlet and if reading at 15' or below suspect a plugged catalytic converter. Fuel pressure 46-48 psi and 26 psi 5 minutes after shutting engine off.
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Saturday, November 26th, 2011 AT 12:17 AM

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