1998 Ford Expedition Noise from engine area

1998 FORD EXPEDITION
226,834 MILES • V8 • 2WD • AUTOMATIC
Avatar
WLDANGL79
  • MEMBER
  • 2 POSTS
My expedition is making a popping sound from the engine area. It only makes the sound when it is first started. The best description of the sound is a back-fire. I have been told to change the plugs, but wanted another opinion first.
Jul 5, 2010 at 1:01 PM
Advertisement
Avatar
JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
Has the check engine light come on?
Jul 6, 2010 at 4:11 PM
Avatar
WLDANGL79
  • MEMBER
  • 2 POSTS
No, the check engine light isn't on.
Jul 6, 2010 at 8:30 PM
Avatar
JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
If the plugs were bad and causing a misfire, the check engine light would have come on and told you what cylender is causing the problem. I need you to check for vacuum leaks on the engine, Remove the EGR and make sure it isn't carboned and it is working properly, and if all that is okay, we will need to check fuel pump pressure. I will provide directions when we get to that point.

Let me know what you find. PLEASE NOTE: The computer will identify a misfire. However, if it only lasts a few seconds, it will not set a code. If you haven't replaced the plugs in a long time, it won't hurt. It is just at this point, I don't think that is where the problem is coming from.

Joe
Jul 7, 2010 at 10:41 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.