2000 Other Hyundai Models Hyundai ATOZ 1.0i Auto

2000 HYUNDAI
38,000 MILES • 4 CYL • FWD • AUTOMATIC
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JBRIERS
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Hi

Hi-octane fuel was put into tank (6 months ago). Car ran ok, but developed 'knocking' noise from engine bloc. Power output was ok-no smoke. Knocking noise ceased after a while. Took car to Hyundai dealer, they could find no fault-would have to check timing & take it from there. Had timing checked by independant mechanic-all ok. Developed loss of power from standing start and uphills, increased fuel consumption. Have changed spark plugs to NGK's, changed oil & filter, changed air filter & checked fuel filter. Power loss is so severe that car will not make it up hills or reverse up incline.
Have been unable to locate a repair manual anywhere to check a possible blocked sensor. 4 different mechanics have 'looked' at the car and all stated different possible solutions. Have spent over £400 trying to get a diagnosis & still no joy.
Any experience of this particular problem and where to start fixing it would be greatfully appreciated.

Am willing to give donation for helpfull advice :-)
Mar 26, 2008 at 9:59 AM
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2CARPRO JACK
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Try loosening the exhaust before the cat converter, If it is partially plugged the car will run ok. Has anyone tried to run a diagnostic scan on the computer? Is the engine mechanically sound (compression)
Mar 27, 2008 at 7:50 AM