So this problem seems to not want to go away, started yesterday. I start accelerating and releasing the clutch right and it sputters, the engine. I manage to get into gear but any time I press the petal down more than 1/4 it sputters and hesitates, puts out very little power.
Yesterday I got an oil change from a place (tried to do my own but the bastards who did my oil last impacted my oil drain nut on), they over filled it by about a quart because they looked my engine up as a ******* V6. I did a SeaFoam yesterday. All of this did not seem to effect my engine.
But I washed my engine bay yesterday-- Purple Powered everything. I was somewhat careful as to what I washed and didnt but not to the extreme or anything.... Its been a day now and everything seems dry in there. My ECU box never got wet, its bone dry inside.. Is there anything I might have gotten wet that would cause this???

UPDATE: ECU Codes;
P0300 Random multi misfire
p0302,3,4 Cyl misfire 2,3,4
P1250 Manf Cont Fuel Air Metering

Now I have a blinking CEL (blinks under acceleration) and constant misfire under load, when cruising at next to no gas input theres no sputtering though.

 

Helps us help you if you mention what year, etc. you have...
If you put seafoam through the intake manifold then it's likely your plugs got fouled/soaked. Take them out and check them out. If you put seafoam in the crank case then hopefuly it was before the oil change.

A bad maf can cause misfires, but it's rare. Was the engine running while you cleaned it? If so take out your maf and make sure the element is dry. It's either that or if you have pre 2000 your ICM might be toast.

 

I've heard that after you seafoam it causes some trouble codes just because of the process of doing it, but once you erase them they don't come back. Your misfires were likely caused by that soaking he mentioned of the spark plugs. That peoblem will clear naturally as the seafoam is evaporated from the system. As far as your hesitation problem, if you're positive it's not your clutch or transmission (which is sounds like it could be) then you might want to try looking at your vac lines and EGR system... MAP sensor?... all of that.

Yeah, don't put seafoam directly into your oil unless you're planning to change it immediately after.

On a side note, has anyone tried seafoam on a 2000 4.2L? I'm thinking about doing it just because I got some vac line trouble codes and I'm looking to clean out my lines before I try to replace them.