HELP!! Problem setting up TPS sensor and idle screw on RB26

[BNR32]

Hi,

Since my car has been back on the road it has been playing up. I am not quite sure where the TPS sensor should sit as all the other GTR's i have looked at have the sensor in different positions! I have been adjusting it around to see if i can improve drivability and it is too hard to work out.

How does the TPS affect the tune of the vehicle?

Also, the idle has been mucked around with and i want it back at where it was originally. I know the car always idled around the 1200-1300 mark without any miss, now when the car idles it definitely has a miss.

Could the combination of these two things be causing this?

Some other symptoms:

-Runs really rich

-Cold start & the car run like a pig, you basically have to wait until the car gets up to temp so that you can drive it without it hickuping and caryying on

-General punch has flattened some what.

I did have a problem where the windscreen was out and there was some moisture build up on the ecu, could this be causing all of the problems?

Will a new apexi power fc and tune fix this up, or am i just wasting my time and money? Is this a simple fix or an expensive one? I have done all the usuals of timing check, fuel pressure check, compression check. This is some sort of tuning bug so i assume tps setup, idle setup or computer......

Any help?

TG

[BNR32]

bump...

i need this help so i dont shell out on a new power fc if i dont need to!

[Guest two.06l]

bump...

i need this help so i dont shell out on a new power fc if i dont need to!

g'day mate sounds like an afm playing up when cold or tps like you said .my mech will be in newc sat if you want him 2 have a look(why did you have the car apart)we have power fc and controller for sale if interested also have spare afm's on shelf to try.

[Guest two.06l]

bump...

i need this help so i dont shell out on a new power fc if i dont need to!

could even be as simple as fouled plugs

[siksII]

go to a nissan dealership and they will attach a consult and be able to tell u if afm, idle, and tps settings have been played around with..

a friend is having idling problems with his gtr, has been traced to the afm's (commoN) but to start with we went to nissan (hornsby) and they picked up the tps was set wrong, as was the valve that controls the idle, these problems showed up on the consult, and they give u readouts of before and after..

it cost $104 and is probably worth doing, after the settings were fixed, throttle response was much improved, and idle/revving generally felt smoother..

if that doesnt fix all your problems, it would probably be your AFM's(well one of them at least!)

good luck!

[siksII]

forgot to add, at nissan they deal with a lot of gtrs, so i would go there they know what they are doing, probably more so than other dealerships.

[BNR32]

thanks for all of the response....

I wish i read this before saturday and i would have taken up the offer, oh wel...

The car goes to the mechanic tomorrow and he has a computer that plugs into the ecu and finds faults. The ECU has been modified by modori so it would be very difficult to see what the problem is. Because the car is running mines airflow meters, i think changing to the factory ones would cause even more problems.

I think im just going to splurge and get the Z32 AFM and power FC with HC and just do it properly....

Thanks All

TG