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I own a 1997 pontiac bonneville. Ever since ive been driving it, it makes a pulsing noise/feeling when I accelerate (for example: when I press on the gas whether its up hill or level) it does this anyway.
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So is it speed related( gets worse the faster the car goes) or is it engine RPM related(gets worse the harder you push the pedal down regardless of speed)?
when I speed up it does it until i put the pedal to the metal and then it stops pulsing. so the harder i press the accelorator the less i notice it, thats how i make it go away.
AnswerIts hard for me to answer questions about noises and the way it feels when you drive. Its something that I would have to drive to see exactly what you are talking about.
The best guess that I can give you with the info given to me by you is that you have a slight misfire under a load. The most common causes of this are partially clogged injectors or corroded coil terminals. If it is one of the three coil packs, the corroded one will need to be replaced and the plug wires will need to be relaced also.If it is clogged injectors, you will need to take it to a shop that can chemicaly clean the injectors.
Remember that this is just a guess because I am not exactly sure what you are hearing or feeling. Sorry if this is way off base, but I hope it helps you.
If you have any more questions, feel free to ask.
