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2000 Kia Sephia

Tiny
JSATTERLY
  • MEMBER
  • 2000 KIA SEPHIA
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 96,000 MILES
Engine bogs down. Can not build rp m's. Does not matter if in gear or not. Can floor it and r p m' will not go over 1000. Can eventualy build up and generate speed and power but when you stop or slow way down problem starts over again. Have replaced massair flow sensor and fuel filter. Have had to shop, dianostics showed cam shaft sensor bad they replaced and problem still exsits, they also unhooked exhaust with same results.
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Monday, July 12th, 2010 AT 8:13 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Possibilities: Inspect and test all the following listed below:

Oxygen sensor.
Catalytic converter.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position sensor.
Crankshaft position sensor
Manifold absolute pressure sensor.
EGR Valve
Fuel pressure regulator leaking or defective fuel pump.
False air leakage.
Fuel contamination.
Foul/defective spark plugs.
Open spark plug wires.
Ignition coil/Coil packs defective.
Incorrect ignition timing.
Cap and rotor.

Note:If it doesn't apply disregard it.
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Monday, July 12th, 2010 AT 9:10 PM

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