I had my car tuned-up last year and she ran pretty good but is still a gas hog
6-8 mpg in city. i decided to look at the plugs and I found the following plugs
on the car, w8dco, wr9dpx,w8dc,w9dc and w7dc. I replaced all of the plugs with Champion plugs yuk-yuk the car sounded yuk-yuk. I then replaced the plugs with some used Bosch supers Ihad laying around. The car is not sounding happy nor am I.
Can someone explain how the spark plug mixture could work. I also noticed my ignition cables shielded end to the plug is marked 1 ohm. I thouht platinum plugs were a no-no thanks