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Old 06-13-2014, 09:04 PM   #16 (permalink)
juld0zer
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Join Date: Nov 2012
Location: Sydney
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Drives: 11 Nissan 370Z MB M6
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hey guys, what are your thoughts on the possibility of VDC interfering due to a slight difference in tyre wear (rears naturally being slightly more worn than the fronts)?

I switched VDC off via the button when i last experienced this lag but it didn't make any difference.

The thing that stands out most to me is the huge difference in accelerator pedal voltage vs throttle body voltage.

During lag: 4.66v pedal vs 1.03v throttle.
Normal: 2.01v pedal vs 1.13v throttle.
These figures are taken from logs where vehicle speed and acceleration requirement was similar - ie. taking off from a stand still in 1st gear, 10mph, similar rpm, afr and mass air flow. I assume 4.66v is pretty much foot to the floor so it clearly shows a huge lack of correlation between the pedal and throttle.

Intake cam solenoid duty % were similar for both logs.
However, "INT/V TIM(B1) (Deg CA)" shows another huge difference.
During lag: 7 deg CA
Normal: 49 deg CA.
(nb: just specifying Bank 1 readings for simplicity, bank 2 readings were different but similar)

Dud cam angle sensor? Dud throttle position sensor?? Or a false failsafe trigger. Whatever it is, there is no CEL or error codes

Last edited by juld0zer; 06-13-2014 at 09:08 PM.
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