Car is a 2016 Z06 I bought second hand with 5k miles. Car is bone stock. For last several months ever since I got it, it would hesitate and would accelerate slower at WOT at higher rpm in 3rd and 4th gear, usually around 120mph.
One time it went into limp mode and cel p228c.
Had it data logged and it was indeed losing pressure on the high side at 5000 plus rpm. Throttle body even started to close a bit too.
Since then, the fuel pressure regulator sensor and high pressure fuel pump were replaced and it did not solve the issue.
Further data logging showed the low side pump also losing pressure at during that same timeframe.
Car runs perfectly normal aside from 3rd and 4th gear in the upper rpm range at wot.
I found other posts on here where other members talking about a similar issue which some believed to be related to Cat Over Temp on the stock tune. Has anyone else had any experience with this? I find it hard to believe the low side fuel pump could be the problem. My tuner is scratching his head too.
Here’s a link to one of the previous threads.
https://forum.hptuners.com/showthrea...525#post556525