1993 Mercury Cougar bad vibration?

1993 MERCURY COUGAR
Avatar
TRUCKER1
  • MEMBER
  • 1 POST
Engine Performance problem
1993 Mercury Cougar 6 cyl Two Wheel Drive Automatic

As soon as the car is started it starts to shake and vibrate until you start to accelerate. Fuel mileager has dropped from 22 to 15. Have tuned it up with new plugs and no improvement. As soon as you slow back down the vibration returns.
Mar 4, 2010 at 12:56 PM
Advertisement
Avatar
ERNEST CLARK
  • ✓Experienced Mechanic
  • 1,730 POSTS
Check all of your vacuum lines and fittings for leaks. Also, check your fuel pressure regulator. Pull off the vacuum line and check for the presence of fuel. If there's any, replace it.
Mar 7, 2010 at 1:23 PM
🔧 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.

Ask a new question

Frequently Asked Problems for This Vehicle