I have a 2018 Infiniti Q50 (3.0tt) 63k miles RWD and I'm having an issue with idling and acceleration. I replaced all the spark plugs, coils, and fuel injectors and both MAF sensors (it does run much better now) but I'm still getting a flashing CEL when I get above 4k rpm and it becomes very jerky. It blips when I'm sitting at idle and occasionally it will idle high (1100 rpm) even when the engine is hot. I got p0305, p0228, p2133 codes but I can't find out the issue. And I meticulously keep up on fluid changes. I've been trying to DIY and avoid going to the dealer. Please help😭
Two of the codes are related to the throttle position sensor. Change it. Also, clean the IAC valve. Do the compression test on cylinder 5. Also pressure test the fuel line.
Had the fuel line pressure tested and that was good. Did compression test and all cylinders are getting between 110 to 120 psi. So I'll swap out the throttle position sensor and see if that's helps and if not then I'll go and clean the IAC
Do you still have any warranty on this vehicle?
Also -
https://carkiller.com/scottykilmer/qa/misfire-4/
Nah the car is salvage title
Umm, what was the reason for the salvage title? Wrecked/flooded?