Misfire?

2002 FORD TAURUS
108,000 MILES • 3.0L • V6 • 2WD • AUTOMATIC
Avatar
MY02TAURUS
  • MEMBER
  • 4 POSTS
No codes on scanner however, I have a light misfire, rapid fire if I kick it down on a hill. but it's there but not constant. again, it's not throwing a code. Is this mainly a vacuum leak? I just got the car, and it appears it still has factory plugs and wires. any help would be great. I thought I had it when I replaced a vacuum hose yesterday. But it's back today. Thank you anyone and everyone. Chuck
Jun 23, 2023 at 3:41 AM
Advertisement
Avatar
MATHGEN
  • ✓Experienced Mechanic
  • 128 POSTS
I have experienced this issue many times. Here is an excerpt from a TSB. Even though the bulletin states the issue will occur above 3,000 RPMs, I have had it happen under medium to hard acceleration as low as 2,500 RPMs.

Some 2000-2003 Taurus, Sable, Ranger vehicles equipped with a 3.0L 2-valve gas or FFV engine may exhibit a buck/jerk/miss during drive cycles above 3,000 RPMs with no diagnostic trouble codes (DTC's). A possible cause is the camshaft synchronizer assembly. Since the camshaft position (CMP) fault monitor is not active above 2,500 RPMs, no diagnostic trouble code (P0340) is set during the drive concern, thus making it difficult to diagnose the root cause component.

The recommended repair is to replace the camshaft synchronizer.
Image (Click to enlarge)
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Jun 23, 2023 at 4:08 AM
Avatar
MY02TAURUS
  • MEMBER
  • 4 POSTS
Thank you..that will be my next repair..have a good day.
Jun 23, 2023 at 5:49 AM
Avatar
STRAILER
  • ✓Experienced Mechanic
  • 55,249 POSTS
MATHGEN is one of our best! You have a good day as well.
Jun 25, 2023 at 8:51 AM
Avatar
MY02TAURUS
  • MEMBER
  • 4 POSTS
Thank you.i got it fixed.
Jun 25, 2023 at 11:05 AM
Avatar
STRAILER
  • ✓Experienced Mechanic
  • 55,249 POSTS
Can we ask what the problem was?
Jun 25, 2023 at 11:05 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.