carbon foul on plugs

HONDA ACCORD
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SBIALAS9
  • MEMBER
  • 1 POST
I have a 2002 Honda Accord SE with 74,159 miles. I have always felt like something was wrong with this car since I bought it two years ago. It has had choppy acceleration and horrible gas mileage. I recently went to change the plugs and wires and found real bad carbon foul on all four plugs. It was uniformed all the way across. I check the plugs after putting on the new wires and they fouled all the way across again. What can I start looking at to fix this problem. It runs pretty good except when you have to step on it , and I'd love to stretch that tank of gas back out.
Nov 26, 2006 at 1:11 AM
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BRUCE HUNT
  • ✓Experienced Mechanic
  • 3,754 POSTS
A few things to look at first:

- Check and/or replace the air filter
- Timing of the engine is possibly not set correctly
- Vacuum leaks cause the system to still function but not work at 100% efficiency
- O2 sensors can be failing, however, I would hope that the On Board Computer would pick that up

(check to make sure that the "Check engine light" works. It should come on when the car starts.)
Nov 26, 2006 at 1:53 AM
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