1999 Hyundai Starex Engine Cool Drive Nice Once Heat Make Car Move Verry Slow

1999 HYUNDAI STAREX
140,079 MILES
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why is it when the engine is cool i drive it nice..but once the engine was in heat it make the car move verry slow about 20km/h..then the smoke was verry black..i really need an answer..please help me..
Apr 5, 2013 at 6:27 AM
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HMAC300
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scan for codes and check fuel pressure first
Apr 5, 2013 at 2:11 PM
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