[This followup was posted to alt.autos.ford and a copy was sent to the
cited author.]
In article ,
tmm.TakeThisOut@comcast.net says...
> Well, the car ran fine for a year, but the check engine light is on again
> and it blinks when idling for short periods. So, I took it to dealer #2 and
> they said the compression is low on cylinder #4 and that the Exhaust Valve
> is sticking or burnt and it needs head work. They would need the car for
> three days and it would cost well over $1,000.
>
> Anyone know what is going on here and what I should do?
>
> Is it dangerous to drive the car with the check engine light on or blinking?
If it is a valve problem, the spark plug is fouling, although it could
also be the other way around. You can probably see about cleaning and/or
replacing it often as a temporary measure, but as others posted, it may
damage the catalytic converter over time. You may also want to have
somebody double-check both the wires and the coilpack to make certain
you have good spark, as it's possible ignition problems have fouled the
valve. Adding a gas additive that cleans valves may or may not help,
although I tend to believe not.
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