Running rough after manifold r&r

Hi guys I've replaced a coolant union under the manifold on the crosspipe...that was corroded in half...luckily found it while I was cleaning the MAFs, and not on the highway!.....I removed and replaced the manifold/plenum as per the awesome write ups found here....While I was at it, I removed the injectors and sent them out for testing/service. I got it all back together, and the car runs fast and strong, but has an uneven idle, sort of like one bank is out of sync with the other.......loping sound is hard to describe, any ideas? Any help would be appreciated before I have to eat crow and take the car to my tech!
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Thanks for the tip, will recheck!

 

Thanks guys ....I did notice that the manifold lifted right off of the gasket with no effort, so I didn't bother replacing it ....there was no evidence of sealant, so I just put it back on and torqued it down.....should I try sealing it with rtv?

 

Thanks guys! Will try the carb cleaner test, and recheck all the vacuum hoses tomorrow...I'm assuming that I should spray the carb cleaner around these areas while the engine is running and look for a smoothing out of the idle.........

 

Thanks guys! Will try the carb cleaner test, and recheck all the vacuum hoses tomorrow...I'm assuming that I should spray the carb cleaner around these areas while the engine is running and look for a smoothing out of the idle.........

 

OK, carb cleaner test was inconclusive, but after checking all hoses my gut tells me to tear it all back down and replace the manifold gaskets....anyone have part numbers? I wasnt able to find them on Ricambi........

Also, while I was in there, I noticed a patina of old gunk on the valves and inside the manifold chambers (with the manifold upside down)....I'm not about to take the heads off, but is there anything that is safe to spray on the valves that will loosen /clean that stuff off?

Thanks again

 

Ok will recheck and retorque on Sunday, is there a torque specification on the manifold bolts? Don't wanna go too gorilla on those aluminum parts!

 

Thanks Pap, And I'll give the subaru stuff a shot thanks for the tip, which vacuum line/port would you recommend using for that treatment?