How low are you running the static preasure now ? I had my preasure set at 52psi with the vacuum line hooked up , but have gone back and reset to 52psi with the vac hose unhooked . Ive yet to clear the code since and dont know if its doing it any less

 

With the staic pressure(vac unhooked) set at 48psi i rarely get the code because I have it scaling the injectors less. As I turn up the static pressure to 52psi, I turn up the maf scaling and it happens much more. I am soon going to the UTEC and a FJO low impedance injector drivers with big 72lb injectors so that I can run a normal static pressure such as 42psi and have a nice respectable part throttle and idle.

 

I have TS flash for my 550 injectors . Do you think lowering the static preasure will help get the code less often ?

 

I have Same problem
APS TT Kit , Fuel return system , test pipe , cat back .....
But only at idle Only

 

That is my humble opinion.

 

I forgot to add the cams in this...so its four things I changed when the motor was rebuilt

 

?? i've never had this issue with my PE TT 10k+ miles so far.. ... Gringott? maybe he can chime in if he's gotten it on his car..

 

any updates on the p0300 code??? I have a little misfiring at idle and cant figure out why. This is on a vortech sc no upgraded return fuel line.

 

Cams ? If not i would check for a vacuum leak

 

I haven't had that p0300 code for a long time now

 

stock cams and from the boost gauge its around 20 in vaccum.. It hasnt come back after the reset but when I start her up it seems to idle wierd for a few sec (shake, put) and go to normal bounching from a/f ratio of 14-17

 

same here, i issue is at idle and i have a single turbo set up. i've had it on the car for over 4yrs and now it wants to show up as i'm ready to sell the car.

 

https://my350z.com/forum/maintenance...o300-code.html

 

Right after I had my install I would get this everytime I refueled. Now I rarely get it, so few I can't remember when the last one occured. I'm thinking it's related to fuel pressure, it would show up about 10 seconds after starting the engine after filling up the tank. What I started doing was turning the ignition on but not starting until fuel pressure was up and stabilized, maybe 4 or 5 seconds. The problem with clearing a CEL prior to emissions testing is there is test data held in the ECU that must be there to pass and it takes a while for the complete test sequence to occur to validate emission performance.

 

Tried that many times and the same happpened. It can be many things to it.

 

Z PHAT Z, it's been a while! Do you still have your Z?

 

Yes I do! Fully built long block with head works and cams. Equipped with Greddy TT kit and Water/Methane kit. I still got that code and can't seem to fixed it so I sent in my ecu to disable the code.

 

That's great man! Good to see you stuck with it, I know you had some difficulties getting it all together.