cryptodonis

I just finished preparing to run CRC GDI Intake Valve Cleaner via spraying directly into the throttle body with short bursts while holding revs @ 2,000 RPM. This is of course the best possible route of application as it not only improves effectiveness but this product like many would be extremely harmful to MAF sensors and so the only other option would be to run the straw through intake pipe past the MAF as far as possible (but I've read many anecdotal reports of blowback still damaging the sensors). My question is will running without the two PCV hoses attached to the "Y Collector" while applying would be of any detriment? I don't pretend to fully understand advanced/closed systems and vacuum, etc.

johnnyg66

I ran that once i pulled off the intake to the TB and inserted the straw and slipped the intake back over the TB. Kept the RPM's up as i sprayed the cleaner. Ran the whole bottle or so let it sit than started it up drove it up on the highway. it blew heavy smoke for a while like it was supposed too.

sha4000

iTrader: (1)

The car will shut off without the Y connected. I recently tried to do it that way.

cryptodonis

Yeah that's exactly what I just found out... Tried to start it a few times and it stalled pretty much immediately. Tried just connecting the "Y" to the TB with the PCV hoses in place and same result. So now I've put everything back together and a couple tries to start failed again. Didn't want to drain the battery too so I stopped there and consulted Techstream. It's showing three DTCs:
P1603 - Engine Stall History
P1604 - Startability Malfunction
P1605 - Rough Idle (This was already present but hadn't thrown a CEL a couple days ago with the report showing only one instance of the rough idle occuring before this event which was one of the things I had hoped to address with the cleaning)

Not sure what next steps are but I am going to pull the MAF's, clean and reinstall them. ANY SUGGESTIONS?? Thanks!

cryptodonis

I am still learning and figuring out Techstream but I was able to print a PDF of the diagnostics report/data from what I believe are the Rough Idle events. Attached it here in case someone with more expertise and understanding than me could make anything of it. I can look at individual parameters and identify problematic data but where to go from there, I am not there yet.

cryptodonis

Well I've got everything back in order and completed the cleaner application as well. After putting everything back together on the intake I let it sit overnight. This morning I pulled the ETCS & EFI fuses and then cleaned the MAFs as well as the throttle body. Buttoned it back up again and it started right up on the first try with a completely smooth idle @ approx. 700rpm once up to temp. Just figured I'd update this in case anyone else ever stumbles across this when searching for similar keywords.