The Engine and other mechanicals 53 Spark plugs
80 Citroen XM Internet Reference Version 1.0
3/3/99
53 Spark plugs
My former XM2.0i failed after fitting Bosch F7D plugs instead of F7DCOR. This was the day before I
wanted to leave for the 10th ICCCR. I was desperate. I checked all electric equipment etcetera as you
described.
Finally my dealer told me to fit original spark plugs. The car started right away.
Last week I changed spark plugs in my XM 2.0I Turbo.
Guess what..... The plugs of a V6 came out.
No wonder my engine got too hot and I had low power despite of the turbo.
I suggest one should always get plugs from the dealer and ask them to show you that they are the right
plugs.
Apparently one can never be too careful.
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A spark plug is just a pair of electrodes and the only variable is the gap.............I wonder therefore if your
problem was that the gap on the old plugs was so high that a very large voltage was required to jump it
and the subsequent interference and induced voltages elsewhere were the cause of the problem.
*** If it was that simple.....Unfortunately not ! Many other plugs are tested. Not only by us but by the
Citroen distributor and the factory. The problem is only cured with the Bosch plugs FR8LDC. Problems
are back the moment you put other plugs in. I figure it has something to do with the insulation or a better
earth than other plugs.
CITROEN ANDRE // CXA // ANDRE POL
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