HELP is it the FUEL injectors???

[91sleeper240]

Ok so my car is stumbling while accelerating and idleing pretty rough. I replaced a bad o2 sensor along with the coolant temp sensor just to be safe. I also ran some fuel injector cleaner which seemed to help some, but Its still hesitating while accelarating, it downshifts perfect though. I pull out the spark plug wires one by one, On the first 2 the car had major changes like its supposed to, but on the #3 and #4 the car did not change at all, So I'm assuming my fuel injectors are shot?

'91 s13148,xxx milesSome bolt ons

[lhoy12]

Swap coil packs from cyl 3/4 to cyl 1 or 2, if the coilpacks you swap cause problems on the formerly "good" cylinders then its your coil packs. If that doesn't change, pull your whole fuel rail, lay out a good sized towel and see if your injectors spray when you crank the motor. If you need injectors or coil packs, let me know, I have about 8 or so spare injectors and 6-8 coilpacks laying around.

[skrappy]

Like the above post says check the obvious stuff first. Also check your fuel. You might wana drain your fuel and throw some new fuel in it. I dont know if your runnin octane booster or not, but if so STOP!!! That stuff eats away at your injectors. Start with the coil packs then injectors. Also check to make sure your injectors are fully plugged in. A lot of times they tend to loosen and the plugs wear out over long periods of time. Do u have an ECU (aftermarket) ?