2002 Mercury Marquis fuel problem

2002 MERCURY MARQUIS
112,000 MILES
Avatar
FUQUA51
  • MEMBER
  • 7 POSTS
I have a 2002 mercury grand marquis and it runs good except when I am up to around 50 mph at a steady speed it goes to jerking like I am running out of gas and I let up off the gas a little it stops and when I hold that speed again it repeats its self
Aug 18, 2013 at 8:35 AM
Advertisement
Avatar
SATURNTECH9
  • ✓Experienced Mechanic
  • 30,869 POSTS
Have you tried unhooking the egr valve to see if the problem goes away?
Aug 18, 2013 at 8:41 AM
Avatar
FUQUA51
  • MEMBER
  • 7 POSTS
I have not just unhook it ,but I replace it with a new one and the same results occurred. I replace fuel filter it stop for a couple days and started back
Aug 18, 2013 at 9:48 PM
Avatar
SATURNTECH9
  • ✓Experienced Mechanic
  • 30,869 POSTS
Try just hooking the egr valve leaving it in place and see how it runs?Also is it worse with the ac on?Any codes in the computer?
Aug 19, 2013 at 3:14 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.