i had this posted in the 2g section but haven't gotten any recent responses there lately. I have a 1990 NA with no major mods to the car. all i have in/on it is a new clutch, exhaust, and a wideband i had laying around. One morning i tried to start the car and it didn't sound right and had a severe lack of power. once the wideband kicked on it showed that it was running REALLY lean. here is a video i took once i got it warmmed up:
http://www.youtube.com/watch?v=w5CWjdWquJ0
I pulled the codes and the TPS came up so a few days later i had a replacement an and got rid of those codes but then the MAF code came up so i borrowed one and got that code taken care of. the car STILL wont run properly and now the idle has gotten worse to the point of really not even being able to hold an idle. I was told that the injectors could possibly be stuck closed so after tearing the manifold off i pulled out the primaries and tried to see if they would open with a 12v source being passed through them. both primaries would click and the ends didn't seem very clogged at all, i even cleaned them off a bit before putting them back in. after replacing all the cracking vacuum lines i put everything back the way its supposed to go, tried to start the car and i still have the same problem, the car will not hold an idle and it shows that its running lean. any ideas guys? i still don't have any codes showing up. what could be causing this fuel issue?

 

Have you run a compression test? Engine sounds like it's running on 1 rotor. If the comp test is good, check the ignition, plugs and plug wires. Odd thing is if the plugs aren't firing or comp is down, it should be running rich. Inspecting the injectors really isn't reliable. The FSM says to wire them to the fuel rail, jumper the pump relay and pressurize the fuel rail to check the injectors for flow.

When's the last time the fuel filter was changed?

 

fuel filter was changed a few months ago. the only compression test ive done is pulling out the plugs and listening to the pulses and they sound good on both sides. plus like i said, its running lean so it has to be a fuel issue somewhere. since there are no codes popping up i would think that it could be something like the fuel pump, fuel pressure, or clogged injector.