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Dave Nova
Dave Nova, Buick Technician
Category: Buick
Satisfied Customers: 1808
Experience:  ASE Master Certification. GM World Class Certification
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Buick Le Sabre: We have a 2003 Buick Lesabre with 62k on it.

Customer Question

We have a 2003 Buick Lesabre with 62k on it. Replaced 2 motor mounts at recommendation of mechanic a couple of months ago. Noticed some vibration after work was completed. Just replaced 2 more motor mounts and now car vibrates like crazy & idles rough. Mechanic says only one way to install motor mounts -we know there's a problem--car never acted this way before--any ideas?? Thanks!
Submitted: 2 years ago.
Category: Buick
Expert:  jazzmaster replied 2 years ago.
the issue may be the coils and causing it to also feel like a vibration .there are 3 coils on this which sit on top of the icm -ignition control module first need to make sure there are no vacuum leaks and then check for spark from each coil tower you can also, use an ohmmeter to check each coil using each lead from the meter and touching them to the 2 coil towers of each coil.the ohm meter should show 5.7 -6.2 ohms if that is good but you still have an rough idle the icm may be at fault .this part can be checked at many auto parts stores
Customer: replied 2 years ago.
I don't understand what this has to do with the motor mounts. Please explain.
Expert:  jazzmaster replied 2 years ago.
what I am trying to say is that the way the motor is running that may be felt as a vibration or enhance the effect of the vibration .
I would get the motor running good so you don't have a rough idle .
let me ask you this .
does the motor run smooth driving down the road ?
or does it seem to run rough from when you first take off or going up inclines /hills ?
The motor mounts do only fit one way .
do you feel a vibration in the steering wheel ?
Customer: replied 2 years ago.
It sounds like a tank & yes there is vibration in to steering wheel-
Expert:  jazzmaster replied 2 years ago.
so does it feel like it is misfiring ?
Customer: replied 2 years ago.
No, it doesn't seem to be misfiring, although they did do a tune up when they replaced the last 2 motor mounts.
Expert:  jazzmaster replied 2 years ago.
does it kind of chug a little when you first start going with it ?
I would check for any vacuum hoses/lines being broken or have fallen off if it isn't misfiring ,although the way these ignition systems are designed it can be misfiring and feel just like a rough idle .
Customer: replied 2 years ago.
No, it's not chugging on start up.
Expert:  jazzmaster replied 2 years ago.
it runs fine going down the road and yet it vibrates through the steering wheel .
does it vibrate going slow or fast or both ?
Customer: replied 2 years ago.
vibrates both - more noticeable at slow speeds
Expert:  jazzmaster replied 2 years ago.
when you say it is running rough at idle ,can you see the motor shaking when you have it in park or in gear with it idling ?
Expert:  jazzmaster replied 2 years ago.
DO you still need help with the question on J,A