1997 Saturn SC2 hesation between 3000 to 4000rpm?

Tiny
TNTTWISTED
  • MEMBER
  • 1997 SATURN SC2
  • 4 CYL
  • FWD
  • MANUAL
  • 140,000 MILES
I changed the fuel filter, put in bousch platiam 4's sparkplugs, and power max plug wire's, plus a AEM cold air intake. I had it put on diagnostics and it said everythings fine. Do you think it could be my coil pack?
Friday, January 9th, 2009 AT 7:34 AM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Possible causes for hesitation

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, January 9th, 2009 AT 1:48 PM

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