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Originally Posted by mykg4orce
Ok today car was running fine, then when I parked at a parking lot then started up again the car started right up but was continuously shaking (not vibrating). And if I gave it gas the shakes interval became shorter and the car shook according to rpms.
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I assume this happens in neutral.
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Originally Posted by sbourg
Whereas a misfire would cause the engine to 'shake', this should not normally be transmitted to the frame/body to make the car shake.
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Our 1994 Grand Marquis (207k miles) would shudder and vibrate quite noticeably, especially with increasing throttle at low speed with the torque converter locked into direct drive.
My daughter and I changed the old plugs (100+k miles on them) which improved the vibration, but did not eliminate it. We then changed the plug wires (207k miles on them) and finally, the vibration is gone. Smooth as silk.
That was my experience. Of course, it could also be the motor mounts.
I believe that a 'weak' cylinder will introduce enough disturbance into the normally smooth engine so that it becomes noticeable, even with good motor mounts.
My bet is still the problem is ignition related, but I am not betting the farm...
I hope we find out.
Best Regards,
Jim