This thread hasn't seen updates in over two years but if anyone is listening, I am looking for some help with a D7, new-to-me, that I simply cannot get started. I haven't performed any disassembly yet but i figure there is nothing more I can do on the exterior of the engine.

The venturi seems really wide to me, but I didn't question it. There was mention above of venturis being so big they don't create enough suction - that got my attention.

Next stop is checking out the NVA which seems to work just fine but I won't know unless I check it out.