[ILLuSioNz X]

i used one of these in my old ford that had been sitting for a while, about ten min later, i couldn't get it to stop backfiring after i let off the gas...maybe it wa the old gas, but i just don't believe new cars need injectors cleaned.

[Cimbom]

If you are using 91 or above as you are supposed to, you do not need it. I do it every six months considering gas is not perfect.

[genuity]

Originally Posted by Kaveh

From what I see and logically nothing can be less harmless than ultrasonically cleaning the fuel injectors. Assuming that the injectors after are the same as before and are not replaced with new ones. Look at the difference before and after.

http://www.youtube.com/watch?v=y_zWDvCjbu0

Thanks for the video--I think I am convinced

Does anyone know what that tech is spraying on the o-rings/tips of the injectors before he installs them around 5:04? I could not get quite a good look but I do see the Wurth logo.

Edit: After watching it a few times, I saw enough to figure it out: Wurth HHS 2000. The HHS 2000 has been discontinued and replaced with a more EPA compliant formula HHS-K.