I haven't followed this thread at all but if you have a wbx check the electrical
connections on your fuel injection system.  Mine had some of the same problems
you described a while ago and my (fantastic) mechanic spotted the problem right
off- a loose electrical connection on #3 injector.

Chad wrote:

> thanks to everyone for all the help so far. I still have a problem with a
> stumbling idle and engine hesitation and complete lack of power during
> acceleration. It does run ok when up to speed (ie. RPM's >3000).  I've
> checked for vacuum leaks at the inlet manifold. I repaired the air intake
> boot making sure there wasn't any air being sucked in. I tore apart the
> distributor/plugs/wires making sure there wasn't moisture in them. I cleaned
> out the AFM and replaced the airfilter. I guess my next step would be to
> replace the temp 2 sensor. Am I correct in thinking (with some advice from
> other) that this could be the culprit???? Also, where is it located ('85
> 1.9l) and is it a difficult task??
> thanks,
> Chad