1994 Cadillac STS acceleration

1994 CADILLAC STS
190,141 MILES • V8 • FWD • AUTOMATIC
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USAFITALY
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  • 1 POST
It only happens right after being refueled and in between refueling but not all the time. I try to accelerate and the car sputters and bucks like its not getting any gas..it even sometimes dies after a couple of episodes of it sputtering and dying I replaced the alternator and battery I also treated my gas tank and injectors with a deposit solution but it didn’t get any better the only thing I can think of is either the spark plugs fuel injectors or the gas pump isn’t working right it’s like it has a mind of its own when it wants to cause problems because one day it will be fine the next it goes crazy or it is running great but if I turn off the car or I'm driving and start to accelerate it does it again and I have to slowly accelerate but that doesn’t always work. What do you think?
May 8, 2009 at 2:39 PM
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RASMATAZ
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  • 75,992 POSTS
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
May 9, 2009 at 6:27 AM