Question about 2005 Hyundai Santa Fe

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Tach Stays @ zero.On occ.eng stumbles at 45-55 mph,Tack jumps then goes flat.starts OK. Eng codes:PO300 random MISFIRE.PO301-PO306, PO320 ign/Dist Eng.Speed circuit. What sensors/modules to look at?

All required & routine maintenance has been performed. Timing belt and the crankshaft position sensor was changed at 100,000 miles as a preventative measure. Our mileage now is 126,000.

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  • Hyundai Master
  • 2,422 Answers

Fuel pump or clogged fuel filter my first guess .
You say it dies at 45 to 50 mph and has 126 th miles .
But you do maintane the vehicle your getting PO300 codes witch are mis fire codes .
You need air gas and a spark for it to run witch one are you missing
Take out a few spark plugs see what they look like are they tan and dry that is good .If they are white dry that is to lean not enough fuel .If black and smell like gas to rich to much fuel .
Spark plugs tell the story of how an engine is running and what to look for it is a system and needs to work together.

Posted on Apr 27, 2015

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  • Hyundai Master
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4cyl or 6 cyl?

Posted on Apr 26, 2015

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