Have you tried running the car without the vacuum shutoff valve plugged in?

I highly doubt it would be the injector IP pump wax theory. These arent 30PSI gasser injectors, these are 1600PSI steel injectors with a powerful spring AND their screwed into a hot head. Unless actual particulates got stirred up I doubt some varnish would really affect them.


Check for actual air pressure blowing out of the line going to the alda when your revving it. Inspect the old hardline for cracks

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1981 300SD 512k OM603