1998 Chevy Tahoe

Tiny
MRCJF1
  • MEMBER
  • 1998 CHEVROLET TAHOE
  • V8
  • 4WD
  • AUTOMATIC
  • 244,000 MILES
When I press the gas pedal, the engine bogs down sometimes. Sometimes on the highway, when I press the gas pedal to pass the truck sputters as if it's not getting enough fuel. I replaced the fuel pump about 6 years ago, and change the fuel filter every oil change (around every 3000 miles). What could be the problem?
Friday, February 12th, 2010 AT 6:05 PM

2 Replies

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

Oxygen sensor
Catalytic converter
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)
Dirty or worn spark plugs
Bad plug wires
Weak ignition coil
Cap and rotor

Note:If it doesn't apply disregard.
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Saturday, February 13th, 2010 AT 3:20 AM
Tiny
JEFFRO35
  • MEMBER
  • 4 POSTS
Does it happen to shift out of gear also? I am having a similar problem but in addition to what you mentioned, my tranny is slipping.
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Sunday, February 14th, 2010 AT 8:00 PM

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