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2003 Ford Ranger jerking

Tiny
RARA
  • MEMBER
  • 2003 FORD RANGER
Engine Mechanical problem
2003 Ford Ranger 6 cyl Two Wheel Drive Automatic

driving on the road cant past 80 mph it jerks, cant drive with cruse control when it gives gas it jerks drives good when your on 70, when I need to past a car I give gas to boost it jerks any idea? I been told it was a spark plugs wiring and a relay on the top of the carb vents
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Saturday, July 25th, 2009 AT 11:21 PM

3 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Dirty fuel injectors (cleaning the injectors often fixes this).
Bad MAP (manifold absolute pressure) sensor
Bad TPS (throttle position) sensor
Bad or dirty MAF (mass airflow) sensor
Low fuel pressure (leaky fuel pressure regulator or weak fuel pump)
Vacuum leaks (intake manifold, vacuum hoses, throttle body, EGR valve)
Bad gasoline (fuel contaminated with water or too much alcohol)

Sometimes, what feels like a hesitation is actually ignition misfire rather than lean misfire. The causes of ignition misfire may include:

Dirty or worn spark plugs
Bad plug wires
Weak ignition coil
Wet plug wires
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Saturday, July 25th, 2009 AT 11:24 PM
Tiny
RARA
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New motor has been installed so basily everything else is in good working conditions?
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Saturday, July 25th, 2009 AT 11:29 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
New engine but is the engine management system in order. I recommend you check what I've gave you and comeback with some results before we move on.
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Sunday, July 26th, 2009 AT 1:54 AM

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