Z does not accelerate

juld0zer

Seems odd. These are low mileage cars yeah?
I cleaned mine at approx 60000km (cant remember exact mileage before i sold it) and the amount of gunk on there was negligible. It was mostly just condensed oil vapour & came off easily with carby cleaner & some light wiping.
The worst was on the edge of the flap and where it rests in the throat. This is where the crusted carbon was.

After cleaning & performing the required resets/relearns, idle was very stable 650 +/- 30rpm. I had the Stillen intake for most of that 60k km. Idle TPS as per my scangauge became 1 degree instead of 3-4. You guys make me want to dig up my Uprev logs and compare the air flow across both banks - but my laptop with the data on it had died.

Vicster, good explanation and it's plausible. I should've taken off my intake piping to see the throttle body behaviour under various conditions before i sold the car. To this day, i'm still not convinced the TPS readout via OBD2 is a pseudo-throttle position like some people have explained on various forums. My Uprev logs suggested that the throttle bodies did behave like the TPS readout indicated.
So i guess the question is: despite VVEL, do the throttle bodies still play a primary role in air throttling? The official stuff from Nissan tells me the throttle bodies on VVEL engines are wide open most of the time.... which is contrary to my logs.

Then there's the Uprev throttle map tweaks which seem to directly influence throttle body behaviour, rather than VVEL behaviour. To me, the throttle bodies still have greatest control over air throttling on our engines.