I need to replace the fuel sending unit on my 1991 940T due to rusting of the unit plate & connectors.
Two questions:
1. Are fuel sending units typically sold complete with component parts (pre-pump, sock filter, hose, connectors)?
2. I plan to replace the pre-pump at the same time. Catalog listings at IPD and other supplies show pre-pumps for both turbos & non-turbos, with significant price differential. (Ditto for the main fuel pump.) What are the functional/performance differences? Would it be possible/advisable to install a sending unit with a non-turbo 700/900 pre-pump? My basic automotive understanding is that what makes a turbo a turbo happens further "up front" in the fuel delivery system, but perhaps I'm wrong...
Thanks,
Peter A. Rogers
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