Turns over but will not start

2003 MERCURY MARQUIS
130,000 MILES • 4.6L • V8 • 2WD • AUTOMATIC
Avatar
CHRISTOPHER LEE SIMPSON
  • MEMBER
  • 1 POST
Car turns over but will not start when cold out (2003 Lincoln town car).
Jan 20, 2021 at 1:24 AM
Advertisement
Avatar
JACOBANDNICKOLAS
  • Experienced Mechanic
  • 110,240 POSTS
Chris,

Will it start using starting fluid regardless of temperature? If so, either we have a weak fuel pump or there is an issue with the engine coolant temperature sensor.

Do me a favor. Let me know if you have access to a live data scan tool. If you do, compare the ECT signal to the actual temperature. If it is okay, then check fuel pressure. Here is a link you may find helpful:

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Let me know.

Joe
Jan 20, 2021 at 12:43 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.