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1993 Chevy Truck lack of power

Tiny
WACWAC422
  • MEMBER
  • 1993 CHEVROLET TRUCK
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 100,000 MILES
The c 1500, has no power , I checked the fuel pres. It is in spes, [9 to 13 lbs] the o2 sensors says it is running lean. New plugs, dist cap, fuel filter EGRvale, and fuel pump, and cat. Converter have been replaced. Guestion can the fuel reg. Be bad leting the fuel, under a load retrun to the fuel tank instead of suppling the two injectors in the t/b? P.S, driving the tuck it feels like it lacks fuel. HELP! This is my frist time using this site if it helps I will be willing to make a donation next time THANK YOU!
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Friday, November 27th, 2009 AT 7:59 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
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)

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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Friday, November 27th, 2009 AT 8:02 PM

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