it seems ok when the engine is cold but when warm it idles ok, if i
am
sitting at a red light then the light turns green the suburban barely
crawls across the intersection. it will cruise on the highway ok but
when i go to pass another vehicle it lacks acceleration. The fuel
pump
was replaced a year ago. the fuel filter was replaced about 4  weeks
ago. the plugs and distributor cap were replaced a couple weeks ago.
the exhaust system was replaced from front to back a few days ago with
O2
sensor simulators and no catalytic convertors. the compression on the
number 1 cylinder is 120. i didn't check the rest. fuel injector
cleaner was added to fuel tank in the last month. the last garage
that
looked at it said the distributor was advanced 18 degrees. they set
it
for top dead center by pulling out the distributor and moving it over
one cog. the last garage wrote FUEL TRIM LEAN on the bill although he
said it was the cats.

tomorrow i am taking it to another garage. he suspects the fuel pump
or clogged injectors.

any ideas?