I have a CTS V that is having a weird issue where occasionally the boost will spike in the middle of the RPM range. I have never seen this before, any ideas?
Please see the attached picture, the boost spike is circled in red. Normal pressure is in the 180 kpa range, the spike hits 214 kpa. Could this be spark blowout?
Yes or misfire in general...
2010 Vette Stock Bottom LS3 - LS2 APS Twin Turbo Kit, Trick Flow Heads and Custom Cam - 12psi - 714rwhp and 820rwtq / 100hp Nitrous Shot starting at 3000 rpms - 948rwhp and 1044rwtq still on 93
2011 Vette Cam Only Internal Mod in stock LS3 -- YSI @ 18psi - 811rwhp on 93 / 926rwhp on E60 & 1008rwhp with a 50 shot of nitrous all through a 6L80
~Greg Huggins~
Remote Tuning Available at gh[email protected]
Mobile Tuning Available for North Georgia and WNC
If you look at your rpms - it even shows the rpms stop climbing as radically and then takes back off afterwords... Something wrong causing a miss of some sort resulting in your seen spike...
2010 Vette Stock Bottom LS3 - LS2 APS Twin Turbo Kit, Trick Flow Heads and Custom Cam - 12psi - 714rwhp and 820rwtq / 100hp Nitrous Shot starting at 3000 rpms - 948rwhp and 1044rwtq still on 93
2011 Vette Cam Only Internal Mod in stock LS3 -- YSI @ 18psi - 811rwhp on 93 / 926rwhp on E60 & 1008rwhp with a 50 shot of nitrous all through a 6L80
~Greg Huggins~
Remote Tuning Available at gh[email protected]
Mobile Tuning Available for North Georgia and WNC
Yes, It doesn't feel like a clean pull but I dont want to do any more until I figure this out. In that same log I got 46 misfires on cyl 6 so Im pulling the plug now. Could the KR be the result of the misfire? Thanks for the quick reply
Post the above log and a picture of the plug on top of a list of everything done to the car...
2010 Vette Stock Bottom LS3 - LS2 APS Twin Turbo Kit, Trick Flow Heads and Custom Cam - 12psi - 714rwhp and 820rwtq / 100hp Nitrous Shot starting at 3000 rpms - 948rwhp and 1044rwtq still on 93
2011 Vette Cam Only Internal Mod in stock LS3 -- YSI @ 18psi - 811rwhp on 93 / 926rwhp on E60 & 1008rwhp with a 50 shot of nitrous all through a 6L80
~Greg Huggins~
Remote Tuning Available at gh[email protected]
Mobile Tuning Available for North Georgia and WNC
It also stumbles right where your actually going wot - good possibility or transient issue depending on afr...
2010 Vette Stock Bottom LS3 - LS2 APS Twin Turbo Kit, Trick Flow Heads and Custom Cam - 12psi - 714rwhp and 820rwtq / 100hp Nitrous Shot starting at 3000 rpms - 948rwhp and 1044rwtq still on 93
2011 Vette Cam Only Internal Mod in stock LS3 -- YSI @ 18psi - 811rwhp on 93 / 926rwhp on E60 & 1008rwhp with a 50 shot of nitrous all through a 6L80
~Greg Huggins~
Remote Tuning Available at gh[email protected]
Mobile Tuning Available for North Georgia and WNC
Just started tuning the 50% E85- No added timing- just working fueling first
2013 CTS V
Stage 1 Cam
2.4 upper
E85
Plug seemed to be ok, No weird color, no cracked porcelain, the gap was larger than I remember setting it to. I thought I set them all to 0.32 this one was about 0.38.
Set plug 6 to .32 and reinstalled it seems better also added more fuel. Seems to be back to normal.
Reply With Quote