Originally Posted by ghwanee
So do I need to have the problem in order to get the clean is what I'm assuming? Or did anyone try taking the vehicle in without the problem occuring to get the cleaning done? I feel like there's occational misfire so I made an appointment and am thinking of mentioning the problem.
First off, FYI, this is not just a cleaning. Pistons and piston rings will be replaced. Essentially, it's an engine rebuild. Every part of your engine will be removed. Pistons, rods, valves...everything. Think of it as major heart surgery. If you need it, do it. If you don't really need it, then surgery is just taking a risk for no reason.
-THEY WILL NOT BE ABLE TO PERFORM CSP BASED ON YOUR COMPLAINT ALONE. They also can't do it based on stored misfire codes (think about it, you could simply create misfire codes if that was the case). They will have to make it misfire while recording data throughout the whole process. That recorded data will then be sent to Lexus. Truth is...if you actually have the problem....they shouldn't have too much trouble creating and recording the engine misfiring. If you don't have the problem, they probably won't be able to record it misfiring.
-You don't need the letter to have the CSP performed. If you have the misfire problem, bring it to the dealership.
-There are a lot of people that have heard about this that think they have the problem.....even though they don't
---The misfire at idle will shake the car quite badly. far far worse than any normal vibration
---The IS250 normally idles relatively low when the engine is warm. this is normal
----It is also normal for the idle to momentarily dip even lower when shifting to drive or reverse
----Sorry AWD guys, but AWD cars vibrate at least 3x as much as a RWD at idle. that's normal.
Bottom line is, if you're questioning whether your car is actually idling abnormally, it probably isn't. Trust me, when it actually misfires......you will know it. If it lasts long enough, the check engine light will start blinking.
You have 9 years from date of first use. if you have the problem....it will show up at some point. no reason to rush into the dealership unless you actually need the CSP.