Nissan Repair: Unrelated issues?, radiator stop leak, head gasket stop leak

Question
-------------------------
Followup To
Question -
Hello again, I refilled the engine with an engine flush and used a bottle of BAR's Head gasket stop leak and a bottle of Heavy duty radiator stop leak and dissolved the pellets and poured it through the upper hose, after I flushed it (the rad was properly flushed the day befor the insident)  After I started the engine, Fuel was spewing out the exhaust for five min. the engine idled fine, but when I accelerated in park, it misfired.  There was so much fuel, my eyes were burning from the vapours! I'm not sure if there was any water also coming out, since I only used the BAR's leak and water and no green coolent. Is the fuel not being ignited and coming out the exhaust due to the coolent in the cylinder wetting the spark plugs? (the plugs are clean)  And when you are refering to damaged lowers, would that be like hydrolocking the motor? And have you had any prior experience with those BAR's products?  I just hope it can get me by till I can tear down the motor and build it with forged rods/pistins HP bearings etc. Thank you!

Answer
Chris,

You have a stuck injector or two if you are getting that much gas coming out the back.  I would check each sparkplug to find the one or two that are really black.  I think the headgasket issue is not a factor at this point.  You need to clear the fuel problem first and then when that is cleared up you should be fine.