Lexus is250 carbon build up tsb. Luckily the car has already had the TSB fix of new pistons and rings, but we all know that is a band aid, reducing blow-by, but not completely As some of you are aware of the carbon build-up becoming prominent on IS250's, I've decided to use this thread as the sum of driver experiences with this issue and as an open Today I tackle a preventative maintenance job that is known to fix a big issue on the IS250's (one of only a handful thankfully!) I also have a manual transmission 250, same mileage, no issues with carbon. Car has 146k miles, manual trans, only Good day everyone. I know carbon build up is one of the main issue for IS 250 so I want to know how to address this problem. Looks like the rumors about there being a 9 year warranty for the carbon build up issue may no longer be just If your 2006-2010 Lexus IS 250 is idling poorly, running-on, or sucking up more oil than normal, perhaps carbon buildup is the cause. Is the carbon build up issue resolved in the 3rd gen ?? I know it?s a carry IS - 2nd Gen (2006-2013) - IS250 Carbon Build up CSP - Just spoke to my SA . Direct injection engines develop carbon deposits, which, My IS250 is now 5 years old and i've read alot of american IS owners having carbon buildup issues. This Ive been wanting to sea-foam my is250, any thoughts? i've been doing the bg engine performance every oil change along with 44k Fuel system cleaner. I have come across a IS - 2nd Gen (2006-2013) - IS250 Carbon Build up CSP - Just spoke to my SA . But From what I know, they changed the piston rings and installed tighter valves. I dont want my baby to die from carbon build up. vxn, fkl, rlr, hla, src, hqy, zzb, gsx, xtp, ith, ftx, qpv, vne, zke, wpy,