Just picked up a 94 4 door 16V auto..  trying to figure out the issue its having..  it seems to start and idle just fine..  but it rev's extremely slow and lacks power untill about 4500 rpm.. it seemed like the cat was plugged so i unbolted that.. it was fine.. checked timing, it was good too..  compression is good.. airfilter clean.. plugs good...  any idea's?    im thinking the timing belt may have jumped a tooth ?

oh and also its not flashing any codes..  just 12

replace the fuel filter Trev

yep thats what ive narrowed it down to today i think... did a bunch of sensor testing.. took off the timing belt cover all was good.. time to toss in a new fuel filter.. cap rotor and plugs and it "should" run great

changed the fuel filter today.. along with cap rotor and plugs ...  still no change..  so i checked even more sensors and found nothing wrong.. all with in spec ( intake are temp, MAF, coolent temp, 02 ect..  )  so now the only thing left i can think would be maybe bad injectors or low fuel pressure...  and if all that looks good, maybe bad gas??? or even the comp

hmm still no luck....  tryed seafoam today...  made a big cloud of smoke.. thats bout it..  i also ordered a fuel pressure tester     any one have any more idea's??   it makes good power from 4500 up and revs normally.. below that it revs very slow.. and if you mat it off idle it strugles and doesnt rev up

Have you checked the timing? One other thought came to mind, did you run it with the cat out or just look at it? I had one that the muffler collapsed internally and restricted the exhaust causing problems.

yea i checked the timing..  pulled the cover off to look at the belt and make sure its all lined up... each plug is firing doesnt seem to miss a beat on the timing light.. i ran it with open exaust.. didnt make a difference.. im starting to think it might have a weak fuel pump, i ordered a fuel pressure tester at lordco should be here on tuesday..  but if i pinch off the return that comes off the regulator it doesnt seem to make a difference how it runs

When you mat it from idle, does it belch black smoke?(rich condition)
What about dizzy timing? You say you put a timing light on it, should be about 8 degrees. Sounds to me like its way retarded, timing wise. Just my guess.

hmm so it finally flashed me some codes.. one for the TPS and one for the MAF...  so i cleared the codes and tryed again.. TPS came up.. but no MAF...  i put the ohm meter on both sensors .. the MAF reads just fine.. but i cant seem to get the TPS to adjust to where it needs to be set ...  my fuel pressure tester finally came in so ill be checking that tomorrow.. i also ordered a TPS today to concidering it was alot cheaper then i thought it would be  ($60)

TPS problem would be my guess.
Fuel pressure is not likely the problem.  If it was a fuel pressure issue, I would suspect it would run better on the lower end, than on the top end.....less fuel needed at low RPM than at higher RPM.
16Vs are usually spec'd at 5* for timing.

replaced the TPS , checked fuel pressure, and volume.. and still cant figure out the problem...  also pulled the valve cover off to see if maybe theres a stuck valve but they all look normal..  im running out of idea's... starting to think maybe the computer is bad?

Did you change the spark plug wires?  I have seen a bad one make it run crappy while accelerating.
What was the timing set at, when you checked it?
Could be a bad ECM.  Only way to know for sure is to swap in a known good one.
Did you adjust/check the valves, to make sure they are set correctly?

my thought is that they are slow until upper rpm range anyways usually a motor that is slow to build rpm is a bit tired in my opinion

this things still got me stumped... im almost tempted to take it to a shop and let them deal with it...   and that would be a first ever for me!