☰
Login
Join
×
Ask a Question
Questions by Vehicle
Repair Topics
Testing / Diagnostics
Repair & Service Guides
Symptoms
Warning Lights
Trouble Codes
How It Works
Videos
Login
Become a Member
Home
Buick
Lesabre
General
Shakes
car shaking
2003 BUICK LESABRE
187,900 MILES • 6 CYL • FWD • AUTOMATIC
TINA HARRIS
MEMBER
3 POSTS
I the changed the plugs, wires, and coil pack. I checked engine light flashing on and off. Reading a PO300 code, Random misfire code?
May 17, 2016 at 2:40 AM
JOHNNYT73
✓
Experienced Mechanic
924 POSTS
okay. Was it doing the misfiring before you changed the parts?
May 17, 2016 at 3:03 AM
TINA HARRIS
MEMBER
3 POSTS
No, it was running fine. Then one morning it heard a squeaking sound and it started to shake and the check engine light started flashing.
May 17, 2016 at 5:50 AM
TINA HARRIS
MEMBER
3 POSTS
I am sorry, yes it was misfiring before we changed the parts.
May 17, 2016 at 5:51 AM
STRAILER
✓
Experienced Mechanic
55,554 POSTS
Hi Tina,
Does it misfire under power if so, then I would check the compression to see if all cylinders are okay it could be an injector,
here are two links that can help you
https://www.2carpros.com/articles/how-to-test-engine-compression
and
https://www.2carpros.com/articles/how-to-test-a-fuel-injector
let me know what you find
Best, Ken
May 21, 2016 at 6:10 AM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
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.
Add image or video
Ask a new question
Frequently Asked Problems for This Vehicle
Engine stalls while driving
→
Engine won't start
→