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1999 Chevy Blazer Not sure what is wrong

Tiny
ANGELAWH
  • MEMBER
  • 1999 CHEVROLET BLAZER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 15,900 MILES
When accelerating to go faster or up a hill it will not go any faster. It feels like something is holding it back. Have noticed black box on left side of engine compartment where a lot of wires run into is getting extremely hot. What should I be looking at as possible problem? It has a newer fuel pump and fuel filter so I have ruled those out.
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Saturday, September 25th, 2010 AT 8:29 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Lack of acceleration, chugging, hesitating, jerking, bogging, misfiring etc. Could be caused by one of the following below:

Oxygen sensor.
Catalytic converter.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position sensor.
Crankshaft position sensor
Knock sensor
Manifold absolute pressure sensor.
EGR Valve
Fuel pressure regulator leaking or defective fuel pump.
False air leakage.
Fuel contamination.
Foul/defective spark plugs.
Open spark plug wires.
Ignition coil/Coil packs defective.
Incorrect ignition timing.
Cap and rotor.

Note:If it doesn't apply disregard it.
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Sunday, September 26th, 2010 AT 9:32 AM

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