engine losing power especially when going uphill

2003 KIA SPECTRA
140,000 MILES
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MASON21
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  • 1 POST
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.....
Nov 25, 2011 at 11:59 PM
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HMAC300
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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.
Nov 26, 2011 at 12:17 AM