Re: Questions on spark plug change for 04 sable 12V
Today I pulled out one spark plug to check how bad it may be
after 90,000. Surprisingly it looks in pretty condition, no heavy
carbon deposit nor other abnormalities. Yet it did look as if the
gap between the tip and ground is a little bigger. I use the gap scaler
to measure the gap, and it is 0.061", larger than 0.044", as indicated
by the manual.
Can this explain why my 04 sable vulcan gives a poor MPG (16/19)?
The spark plug is Motorcraft Platinum AGSF 32PM. I guess they are the
original ones from the manufacturer. Since this car was previously owned
by lease, I assume that these plugs have never been replaced . No idea
if the rental company would replace spark plugs as a normal maintenance.
Is 0.061" or 0.044" the correct gap for this spark plug? I'm confused.
If 0.044" is the right gap, I think probably the worker just installed them
as they were and omitted to readjust the gap.