BNR32 GTR Return to Idle problem

[BNR32]

Hi,

Ive got a small problem that has been bugging me for a while. I recently got my car tuned with pfc and z32 afm at silverwater automotive services. The car cranked out 440hp at all four wheels which i was stoked with but there are a few little issues that need ironing.

Issue 1:

On return to idle, the car dips down to about 500rpm and then back up to the 1100 rpm set idle speed. This is sort of annoying and feels like the car is about to stall but then it picks the revs back up again. I really want this sorted.

Issue 2:

When driving about 3/4 throttle then a slight lift off then back on again, the car seems to buck and jerk, there is not a smooth transition between on and off throttle. I would also like this fixed.

I rang sas as this has been happening since it was tuned, however 'the phone guy' reckons that these problems are common on worked gtr's. I read an article written by Martin Donnon that stated that these problems can be fixed and are quite common after an 'initial tune'.

TG

[hks-to4r]

have you set the base idle proply. with the iac disconnected.

the jurking problem can be caused by the injector pulse turning off on decell and then switching back on when you touch the peddel. there is a setting in the pfc that can fix the problem if that is what it is.

[Guest two.06l]

Hi,

Ive got a small problem that has been bugging me for a while. I recently got my car tuned with pfc and z32 afm at silverwater automotive services. The car cranked out 440hp at all four wheels which i was stoked with but there are a few little issues that need ironing.  

Issue 1:

On return to idle, the car dips down to about 500rpm and then back up to the 1100 rpm set idle speed. This is sort of annoying and feels like the car is about to stall but then it picks the revs back up again. I really want this sorted.

Issue 2:

When driving about 3/4 throttle then a slight lift off then back on again, the car seems to buck and jerk, there is not a smooth transition between on and off throttle. I would also like this fixed.

I rang sas as this has been happening since it was tuned, however 'the phone guy' reckons that these problems are common on worked gtr's. I read an article written by Martin Donnon that stated that these problems can be fixed and are quite common after an 'initial tune'.

TG

purchase two EIDS PROs from HKS and your problem will be gone.

[Emre]

Very most likely, it's the throttle position sensor.

What's the voltage on idle...?