Hi all.

My Jetta ABA 2.0 OBD1 conversion *was* running crappy. TPS and ECT
weren't grounded. (D-oh!) Grounded them, engine runs better, but I
still get error codes for TPS, ECT, and CMP.

I conveniently wired the TPS, ECT, and CMP to share the same physical
ground location.

But..... Bentley shows them using grounds at (presumably) different locals.

i.e. "Sensor ground", "MFI Motronic Multiport Fuel Injection"

In archives, I read of Vanagon O2 sensor issues related to shield on
coax and ground wire sharing the same physical ground location. This
tipped me off.

So.....

If TPS, CMP, and ECT share the same ground connection (location),
would this cause these error codes? Would sharing the same physical
ground connection hinder performance and/or damage these parts?

If I can leave it as is, I will. I don't understand what/where Bentley
is referring to when using the various terms for different ground
locations.

"Fussy" questions, but it would be nice to get this "right".

FWIW,  these are the only 3 error codes (so far --- ;^)

Many thanks,

Neil.

--
Neil Nicholson '81 JettaWesty "Jaco
http://groups.google.com/group/vanagons-with-vw-inline-4-cylinder-gas-engines
http://web.mac.com/tubaneil
http://tubaneil.googlepages.com/