Injector port cleaning

[B14Sierra]

I just recently replaced all my injectors and a few days later I noticed a rough idle at idle. Not bad enough to set a code or light but noticable and shaky. Inside the truck no noise. Outside I hear a puffing noise. I removed the intake and sure enough one leaking injector. Carbon build up with the fuel rail stain. I'm not sure what I did wrong on the install. No lube added to the seals, vacuumed each port. The other 7 fine. The only thing I can think of is that port wasn't clean enough and I tore the seals. Should I run a pipe cleaner down each port on that bank this time? Not sure how to clean these all out. I hate getting unnecessary dirt down into the cylinders. And yes, I'm replacing all four injector seals on that bank.

[B14Sierra]

So I did run a pipe cleaner down each port. Pulled the plugs and blew everything out. Runs great now.

[jay webb]

if you replaced the injectors hopefully you replaced all the seals on the injectors too. these can be a pain cuz there is a special tool to size them and install them on the injectors. if you reuse the old ones or they are missing/damage it can make a noise like a puff/blow by. 

 

chances are you didnt have one installed all the way and this was happening, and when you took them back out to clean them and re installed it fixed it. this could of caused by debris keeping from the injector seals seating properly