Hey guys, It's been a few weeks since I swapped a JDM B18b1 LS motor into my EK. For the most part, it's been running well, no major issues, and it's been a good daily driver thus far... with one minor complaint. Every once in a while, usually while I'm sitting at a light after being on the freeway, the engine almost 'chokes' and then runs very rough. Almost like it's running on 3 cylnders. I have not gotten any CEL, and has not stalled out... yet. It will usually persist until I start to accelerate, then it seems to stutter through it and usually by 2500-3000 rpm it starts to run fine again. Then it won't happen again for a few days, as there doesn't seem to be any rhyme or reason behind it. When I had the swap done, I had them change out the cap & rotor, the wires are good (stuck with the OEM stock ones). The plugs were also new, but the cheaper entry level NGK V-groove ones. After it happend again a couple times today, and my shop not finding anything wrong, I stopped and picked up new plugs. The good, NGK laser platinum ones. Haven't been out since I put them in, so we'll see. Any ideas? And I did search, but after reading through numerous threads, nothing seemed to help with my specific problem. Would you guys run an injector cleaner through? Are those worth it??