Engine Performance problem
2001 Hyundai Elantra 4 cyl Front Wheel Drive Manual 201000 miles
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MY CAR IS LOOSING POWER WHEN I PULL AWAY BUT I HAVE SERVICED THE CAR. ON LONG DISTANSES GETING TO HE STOP STREET MY VEHICLES REFS IS JUMPING UP AND DOWN. HAT SOULD I BE LOOKING AT

Check for vacuum issue first w/a little starter fluid, but be very carefull it's flammable. Next I'd check the tps for possible movment and clean connection contacts. I would then check the idle air control ( iac) the same way. Hopes this cuts your diagnostic time down.