PLEASE HELP.
Car Won't run correctly, Sounds like it is running on one cylinder almost. Like serious misfire. A super loped Idle.
2015. Car is modified, Full intake, catless Exhaust, and Uprev Tuned, still NA nothing crazy. Only 30k miles, maybe 8k miles with tune. No previous motor issues, just CSC.
Car was parked with 3/4 tank, running perfectly, sat for about 30 days. When I tried to start it fired and ran terribly. See first paragraph.
NO DTC Codes.
Sent it to Nissan for diagnosis. Their diagnosis was 'There are no trouble codes we can't help you.' ******* Central Valley Nissan is useless. So I paid them to install a new Crank Position Sensor, seeing some threads online about CPS not throwing a trouble code on Z's. didn't help.
When I got the car back home there was a new MAF DTC code. Replaced the MAF bank 1 just to find out the MAF code was Nissan unplugging stuff as an experiment.
I reflashed the ECU with my Uprev tune. No change. I've talked to my tuner about trouble codes being suppressed, and he has told me the only codes suppressed on this tune are for the o2's for the cat delete.
Here is an Uprev Datalog I took of the startup and several seconds of idling terrible. Maybe someone experienced can spot an obvious issue.
https://drive.google.com/open?id=10Y...Cg4H3pfr0mqCc5
I have no idea where to go from here except to jump straight to tearing the intake manifold off and checking/replacing all plugs, coils, injectors. Please anyone with similar experience with input?