1994 Chevy Blazer

1994 CHEVROLET BLAZER
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RICHARD BABCOCK
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  • 1 POST
1994 Chevy Blazer Four Wheel Drive Automatic 100000 miles

1994 blazer, 4.3 vortex, replaced map sensor, throttle position sensor, smells rich, idols rough, when gas is applied it dies
Jul 27, 2010 at 12:02 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Probable causes of an engine running rich are as follows:

1.Fuel pressure not within specs.Can be cause by restricted fuel return line or defective fuel pressure regulator.
2.Defective Oxygen Sensors.
3.Leaking injectors.
4.Coolant temperature sensor out of calibration.
5.Restricted air intake system.
Jul 27, 2010 at 12:25 PM
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