Originally Posted by simon-srt6
Is this something I need to do ?
If so, how and what should I use ?
Noticed some surface staining when doiung my SL55 Y pipe upgrade. Old carb cars I used to buy a spray can to squirt down, but not sure if it is safe to do this or what to use these days.
Also, how can I open the throttle with the engine running and squirt down the intake anyway ??? Damn drive by wire ! Give me a throttle cable any day.
If you're seeing build-up on the outside of your TB butterfly valve I would bet the inside of your intake plenum is really dirty... I posted a photo essay when I cleaned mine last summer... You can't do it like an old carb car... because the MAF is in the intake throat and the minute you remove that to get to the buttlerfly valve the engine will die...
Do a search, I don't know what the topic of my post was, but there are some very detailed photos of what the inside of the intake plenum looks like before and after cleaning...