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 4, 2013 at 11:27 PM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
scan for codes and check fuel pressure first
Apr 5, 2013 at 7:11 AM
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