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1996 stumbling engine

Tiny
WHY2K6
  • MEMBER
  • 1996 CHEVROLET CAMARO
Engine Performance problem
1996 6 cyl Two Wheel Drive Automatic 144k miles

My 96 camaro keeps stumbling or missing when I reach between 1000 rpm and 1500 rpm. As soon as I hit a higher rpm the car steadies out with no more further issues. Also when I start the car in the morning it sputters when I hit the gas pedal. I replaced bank 1 and bank 2 O2 sensors because of a dtc shown. EGR pistle valve problem and P1413 are also shown. I replaced the EGR but that didnt help either. I Want to go to the chevy dealership and get a diagnosis but am afriad they will give the wrong info to repair the car. What would you suggest to do or check?
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Sunday, August 17th, 2008 AT 6:43 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
The following below will cause the engine to hesitate and stumble

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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Sunday, August 24th, 2008 AT 5:56 PM

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