2000 Pontiac Bonneville

2000 PONTIAC BONNEVILLE
Avatar
TALOSHASMITH
  • MEMBER
  • 2 POSTS
Shakes or Wobbles problem
2000 Pontiac Bonneville 6 cyl Automatic 140000 miles

my car was recentlly put on a tester and one code said replace throttle sensor which i did another said misfire in cylinder 4 i replace sparkpleg and wires and notice the old one on 4 was burned after all that it still shakes and runs rough what do i do now
Aug 19, 2010 at 7:49 PM
Advertisement
Avatar
RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Engine running rough or misfiring can be cause by the following: Inspect and test

1.Defective spark plug
2.Inadequate spark/coil,defective spark plug wire.
3.Lack of compression
4.False air leakage.
5.Faulty fuel injectors.
6.Insufficient fuel pressure.
7.Contaminated fuel.
8.EGR valve that is leaking.
9.Oxygen sensors.
10.Throttle position sensor.
11.Idle air control valve.
Aug 19, 2010 at 9:13 PM
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.