My Explorer 2000, has now 113,000 miles on it. The spark plug fouling started at about 60-70 thousand miles. I found that the first spark plug on the right side (driver side) fouled after 3-5 thousand miles of replacing. The engine would buck and act up (it only ran on 5 cylinders). After changing the plug 3 times, I explained the problem at a worker at an Auto Zone store and he recommended the Bosch #4304 no gap spark plugs ($4.00 each), I changed all of them and the problem was solved. I just changed them again and found that the plugs were in good shape. If you have the same problem you should try this fix.
My Explorer 2000, has now 113,000 miles on it. The spark plug fouling started at about 60-70 thousand miles. I found that the first spark plug on the right side (driver side) fouled after 3-5 thousand miles of replacing. The engine would buck and act up (it only ran on 5 cylinders). After changing the plug 3 times, I explained the problem at a worker at an Auto Zone store and he recommended the Bosch #4304 no gap spark plugs ($4.00 each), I changed all of them and the problem was solved. I just changed them again and found that the plugs were in good shape. If you have the same problem you should try this fix.
I bought the Explorer with 52K 6 years ago.
- raynj, Annandale, NJ, US