1994 Chevy Blazer help

Tiny
JSRROWSEY
  • MEMBER
  • 1994 CHEVROLET BLAZER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 105,365 MILES
I have a 1994 Chevy Blazer 4X4, automatic, 4 Door, 4.3 Vortec V6(remaufactured, with 40, 00 miles) When I drive, or idle, park or in drive. At 2500 rpm, my engine starts bogging out, like its running out of gas. Any help would be greatful. Thank you. J.S.R
Wednesday, October 14th, 2009 AT 3:02 PM

1 Reply

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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Wednesday, October 14th, 2009 AT 5:21 PM

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