What are symtoms of a bad coil?
I have heard coil failures are not uncommon. My vehicle is a 98 and so far, the coils have been fine. had plugs replaced at 75000 miles (feb 05), and was wondering what to expect or how to recognize a bad coil.
my engine runs great other than a few occassional episodes (5.4liter) whereby the rpms go erratic, dropping off to near stall before resuming normal idle. The other thing is, sometimes, though not commonly, the motor runs very rough and lacks power. this is only temporary as well and the computer or motor adjust and resumes power, smoothness and acceleration. not sure what causes any of this.