Any new info on this one?

My father's 96 E300D (w210 non turbo 606) has a CEL that comes on for the throttle position sensor. I replaced the unit up there by the brake booster (throttle wire, a linkage and an electric circuit all attach to this $355 part), but then the light came back.

Originally it seemed to be caused by using the cruise, but now its come back without cruise usage. I have to guess that its something to do with the wiring, as I can't imagine the MB part was bad (maybe not the old part either).

I really need to get this TPS code to stop coming on, so thaqt I can get the car inspected (code=automatic fail, and I cant get it from home to the station without a code coming on).

We have no surging, but maybe the resonance flaps are sticking (I took the intake off and there was a LOT of gunk in the ports, and since Ive cleaned it all out, probably loosening some of it, now the egr valve sets a code, which it never did before, telling me that is probably a bit clogged). Would a sticking resonance flap cause a CEL for the TPS?

Oram I looking at a pump problem that will require a pump adjustment or replacement?

Any help would be most appreciated. The car really needs to be inspected, I cant and Im at my wit's end for fixing this thing.

Thanks,

JMH

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Current Diesels:
1981 240D (73K)
1982 300CD (169k)
1985 190D (169k)
1991 350SD (116k)
1991 350SD (206k)
1991 300D (228k)
2008 ML320 CDI (199k)
1996 Dodge Ram CTD (442k)
1996 Dodge Ram CTD (267k)

Past Diesels:
1983 300D (228K), 1985 300D (233K), 1993 300D 2.5T (338k), 1993 300SD (291k)