I have a 94 cavalier with a 2.2L. When i hold it at a constant speed 35-60mph, it with jerk back forth as if i were playing with the gas pedal. When i accelerate or decelerate it stops. I can hold it at 75mph. Not sure what would cause it.

Alan Conner

• 359 Answers
• Posted on Feb 25, 2009

SOURCE: Vibration on the floor underneath gas pedal

I would venture to say your exhaust is hitting your frame, or, you may need new motor mounts. The exhaust is what I would lean toward. If you can imagine your exhaust sitting under your vehicle, and the fact that the vehicle has a little age, the motor mounts probably give a little, causing the motor to move slightly on acceleration and deceleration, thus your exhaust is going to move, and may be vibrating on whatever its touching. Good luck.

SOURCE: Nasty vibration on the floor under the gas pedal

check the drive shaft between the intermediate transmission and the front transmission for miss alignement and defectivness of the telescopics system of this shaft. we had about the same problem on our 1996 same model...

SOURCE: car jerking at 45 mph

sounds like you might have a misfiring spark plug or faulty wire

SOURCE: Car jerks while driving at steady speeds

Did you have the wires replaced also?? If not I would replace both the plugs & the wires all at the same time.You may have carbon tracking on your wires & plugs.What Year is Saturn?? If it's a 91-94 You most likely have a EGR Valve floating due to a weak internal spring.It will cause a surge miss at constant throttle.Hope This Helps!!

SOURCE: 2004 PT Cruiser headlights and dash lights flicker

Your alternator is starting to show its age. If you get it tested you will likely find that under load it is not putting out 14+Volts. It is probably closer to 12 and it's time to retire it or get it rebuilt. If the battery is the same age as the alternator get it tested as well with a "load test" to make sure it is still healthy. Hope this helps.