Limp Stillen Supercharger dtc p1239

Rev_Night

I just got the car back from the local performance shop. They did not have kind words to say about Stillen. I'm pretty sure I heard 'shitastic' used several times about this singular cable. The crux of the issue is that the supplied throttlebody cables, even the 'improved' ones aren't great. My car has failed a few times due to this problem, with the only silver lining is that it wasnt failing for any other reason. Just this one part.

You see Gentlemen, we are a community of modders. OEM is treated as a dirty word synonymous with 'bottom dollar' and 'crap'. While this view is not incorrect, it is incomplete. A part simply being created in the aftermarket does not guarantee that it will be better than the OEM it wants to replace. And this leads us to their solution: Permanently remove all of the Stillen harnesses and use OEM instead.

On the surface, both Stillen and OEM are the same with (i think?) 6 cables. The issue with Stillen is that even with the known workaround heat/EMI sleeve, only 1 cable is being insulated. With OEM, 4 cables are insulated. And I must note that in the 10 years I've owned my 350z, not once did I ever experience an electrical issue.

So now with the OEM harness in (labor+material cost = $192, very reasonable), my car starts fine. Of course, it started fine with the normal, upgraded, and sleeve cables too, so really only time will tell. As for how to get these OEM cables, they happened to have some on hand, so sorry I can't provide a part number or link for you.

Something for you all to consider.


Update: 2 weeks later, and running good with OEM cables. No issues experienced.

NissanTracker

So I have been fighting the p0300 and p1239 code since I ever installed the kit(2 years ago). I have an 07 HR nismo and last night the p1239 came back. I even have the update stillen cables. Was this ever resolved? I'm going crazy... still can't figure it out.

I never had a single problem with the z when it was N/A. Low miles and ran like a champ. Installed the charger, and gremlins. I get the p0300 only when it's cold out.... which is strange. the p1239 comes out of no-where. Last time I got this was last year.

I added extra shields at the filters,
Boost leak/ Vacuum leak tested,
installed a catch can
replaced spark plugs
re-tuned countless times for idle.

Thanks