2000 Hyundai H100 Engine Speed Revs Down Constantly Will Run Miles

2000 HYUNDAI H100
166,000 MILES
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Problem with engine speed, revs go up and then down but not constantly, will run ok for a few miles then starts again.No warning lights on, temp ok.
Apr 3, 2013 at 11:10 PM
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HMAC300
  • ✓ASE Certified Mechanic
  • 48,601 POSTS
  • ASE Certified Mechanic
scan for codes and check fuel pressure first. clean throttle plate on both sides with choke cleaner
Apr 4, 2013 at 1:49 PM
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