Intermittent and Inconsistent rough idling, stalling, and smoke

[shredsobad]

hi everyone.
i've searched hi and low in this forum and others for the problem i'm having. i've found a few of the same scenarios but no solutions or answers. please help if you can.

the car is a 1993 camry v6. everything was running just fine until after i took apart the intake plenum to change the valve cover gaskets. while in the process, i changed the spark plugs, cleaned the cold start injector, and cleaned the throttle body (attached to the plenum). i washed the engine and surrounding areas after the job was done.

the problem:
the car started and ran fine that day after the job was completed. a few days later after being driven a few miles, the car began to run roughly and there was a presence of raw fuel smell and white smoke (not vapor) associated with all the happenings. the car was parked and rested then started back up and driven back home with no problems or smoke.

i changed the dist cap and rotor, which didn't help, and i checked all the connections as best as i could. i pulled the three front spark plugs to check condition. besides the # 4 plug being wet with fuel, they all looked new still with no other signs of contaminants. now currently, the raw fuel smell is gone but the car still smokes and runs rough but not at all times during the duration of the engine being run.

the car will run fine on the first start of the day then will start having problems as it is driven. if the car is shut down and restarted after some time, it will be fine and then get worse over time.

as soon as there's a hint of roughness and as it progresses, the smoke gets worse. if the problem goes away, so does the smoke.

i'm still doubtful that oil is the cause of the smoke because the car can be a chimney and die and then after a while of rest and started, the smoke is gone. there should be residual oil if so. to me, the car acts like its being flooded but i expect fuel smoke to be brownish/black it the mixture is too rich.

i'll start with that and i'll give any other info as needed.

all you help is very much appreciated!