You can wipe out a 02 sensor from doing this.. Like someone mentioned earlier, it is not the cleaner you need to worry about, but the carbon you are cleaning off can damage the sensor..

I have seen some high mileage cars lose compression and get blowby from cleaning the cyl walls off.. Sometimes carbon actually helped with sealing on a tired engine..

Most often though it does work well.. If you are cheap, you can just use water which will give it a "steam clean"also... But once again, the carbon being removed can damage the 02 sensor.

Yeah, when I did my SSEi there was hardly any smoke, but then again, my sister who was supposed to keep giving it throttle let it kill "...because it felt like it was getting too much gas." There was a little smoke when it first started sucking it in and later when I put the rest in and took it for the heavy throttle run it didn't even smoke at all. :?

thats funny, considering Rogue has pretty low mileage and his smoked a ton.

that is EXACTLY what mine did... when you were sucking it in the first time what kinda RPM'* did you use? i went w/ the cans instructions and 800-1,000

I was running some pretty cold plugs for a while (3 stage cooler). I suppose it is possible carbon built up as the plugs were getting a little sooty but I have run 104s (2 stage cooler) for the past 2K miles and they are staying pretty clean. As lean as I run my engine sometimes I cant imagine a ton of carbon build up in it, but it did smoke like a mother.

Well, WHEN it was running I told my sister to keep the rpms between 1500-2000 (this way if the rpms dropped there was room to play with getting the revs back up and it wouldn't choke so easy). When the engine started bogging my sister let off and the engien choked. oh, well, I do notice it does run a *little* smoother in the 3K+ rpms range.

have you guys noticed any MPG changes?

With regards to the too little smoke thing:
When we did my cousin'* '90 beretta with ~180k miles, it had medium smoke (still not like that GP in the video) and the smoke was blue grey.

when we did my uncle'* isuzu rodeo, ismoke was blue grey and there was so much that the whole block was covered in it!!!!!!!!!!!!! That car has had a lot of problems though with fuel / emissions so maybe it had lots of buildup.

When we did my '87 bonneville with ~160k miles, there was the least of all the cars in terms of smoke but my cousins say they saw it as one small BLACk cloud of smoke that dissipated quickly.

All the cars trailed smoke for about 2 minutes when we took them for a test drive. I was somewhat dissapointed at the lack of smoke too, but I had done a quickie intake cleaning with Intake Cleaner from my auto parts store a few months back.. I'm not seeing any real improvements yet but I still think it was worth it for 6 bucks. not sure how soon i'd try it again though.

Mike Diaz

p.*. maybe the supercharged ones compress it and thus it gets more gunk out?! haha probably not but oh well.

the supercharged engines put more fuel in there too

OK.. just had to bring this back to life cause I want to do this this weekend.. and kill my neighbors.. lmao !!! OR I will see if I can do it @ Tamara'* parents place.. neighbor is further.. I will kill the neighbors cows and chicken hee hee.. and it'* on a country back road too.. so woot !! Hopefully they have that stuff @ GM parts around me. I was wondering, I was originally going to get the engine flush that goes into your oil.. but I guess with this step, I no longer have to use the engine flush additives that goes into the oil right? Well.. I will have to make sure I pick up a set of TR55'* again just in case.