1992 Chevy Cavalier how to pull codes?

Tiny
SMOKINNPHX
  • MEMBER
  • 1992 CHEVROLET CAVALIER
  • 4 CYL
  • FWD
  • MANUAL
  • 220,000 MILES
I have a major hesitation in the motor especially when accelerating it loses power runs really rough replaced the coils, spark plugs wondering if the check engine light has something to do with it. Too old for standard code reader was wondering if I can use a paperclip or something like that and where to use it at
Saturday, October 31st, 2009 AT 5:23 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Jumper A to B


https://www.2carpros.com/forum/automotive_pictures/12900_GM_ALCL_44.jpg



Possibilities:

Oxygen sensor
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, October 31st, 2009 AT 5:48 PM

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