Hi folks,
I'v read almost all the posts here regarding the code 43(engine
fuel supply) for my 1990 Accord(EX). About ~3000 miles ago, I
physcially removed my EGR, completely cleaned it, installed a new fuel
filter, and replaced my O2 sensor with a bosch replacement. When I
installed the last o2 sensor, there was oil surrounding(but not
penetrating) the plug. I cleaned it well with contact cleaner.

The code 43 went away until yesterday, when I was on some twisty
mountain roads.

The 'feel' of the car is exactly how it was when I first had the
problem. The car will begin to hesitate, for maybe 3-4seconds, the CEL
comes on, then power returns It *feels* like it is running rich(or in
'default/safety' mode), because the RPM's seem higher and it feels
peppier.

Any suggestions? My car is in great phyiscal shape, so I don't suspect
loose/bad connection at the ECU.