Thanks Larry, this is why I am considering using biodiesel, it is a solvent . I have nothing to lose, and it can be a good experiment as to what does work.
I am willing to buy new injectors if this doesn't work.
F.

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Frankie
It never ends!
1985 300D Turbo 181K Anthracite grey, "SOPHIA"
1984 300 SD Turbo(sold)
2004 Subaru Forester XT,Cayenne red.