Rich fuel mixture

Hello,

I have a 1992 nissan maxima

I had 4 clogged fuel injectors, witch i replaced.

But the cause of that was a rich fuel mixture.

What causes this?
o2 sensor?
computer?

any help would be great!

Thanks alot
Blake

...What causes this?
o2 sensor?
computer?...

Answer can be yes or no - as there are myriad possibilities... If u have VGE, first thing to check is plugs/cap/wires (VE coilpacks).

What else: Air leak(s), O2, MAF, TPS, harness, contacts ... go through all link pages below. After correctin what u find, run self diag.