2000 Pontiac Bonneville vibration at 45-60 mph

2000 PONTIAC BONNEVILLE
138,000 MILES • 6 CYL • FWD • AUTOMATIC
Avatar
FREEMAN EATON
  • MEMBER
  • 1 POST
Motor seemed to be missing, like 1-2 plug wires off.
I started out with new plugs,then spark plug wires,
then three ognition coils service transmission,balanced all 4 wheels.Problem is still there. Acts like a wheel out of balance, in a pull uphill,
let off the gas,and it stops.
Sep 23, 2010 at 8:46 PM
Advertisement
Avatar
MHPAUTOS
  • ✓ASE Certified Mechanic
  • 31,937 POSTS
  • ASE Certified Mechanic
Hi there,

Go back and re check plugs leads and coil, this is sounding like an electrical system breakdown under load, start here.

mark (mhpautos)
Sep 24, 2010 at 4:29 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.