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1991 Chevy Blazer

Tiny
SKATES09
  • MEMBER
  • 1991 CHEVROLET BLAZER
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 177,000 MILES
What is making my truck bog out when I give it gas? I think it might be the oil sending unit, but im not sure. Also sometimes the oil pressure gage is sky high and then it can be dirt low. Can someone help me please?
Saturday, April 18th, 2009 AT 8:27 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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Saturday, April 18th, 2009 AT 9:37 PM

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