2000 GMC Jimmy Hesitation

Tiny
SEACAT58
  • MEMBER
  • 2000 GMC JIMMY
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 110,560 MILES
C ar hesitataes between 15 anstaysd 25mph RPM GUAGE stays at 2 Already had computer part put in and programed and new battery.
Sunday, March 1st, 2009 AT 5:38 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Engine hesistation can be caused by the following:

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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Sunday, March 1st, 2009 AT 5:44 PM

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