1998 GMC Jimmy Tune Up?

Tiny
2YNG2BTHSOLD
  • MEMBER
  • 1998 GMC JIMMY
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 106,000 MILES
I have owned this car since 2003; it has been great with very few issues. I have the oil changed every 3-4000 miles and once a year I have all the fluids changed. Have had one complete brake job and need to charge the AC once a year. But my question is:

Shouldn't I be doing more? I've noticed lately it isn't as quick to respond when I hit the gas pedal so was thinking maybe I need to have it 'tuned up". Being a woman, all I really know how to do is put gas in it and take it to the car wash.

Thanks.
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Monday, July 12th, 2010 AT 4:43 AM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Lack of acceleration, chugging, hesitating, bogging etc. Could be caused by one of the following below:

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 5:35 AM

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