Awd Z32 Gts4 Problems

[Mr.Massive]

Hey guys,

I have just put in a nistuned z32 ecu in my AWD R33 GTS4 and am experiencing some troubles. My AWD system is randomly working. The AWD light normally is off on start up and after a short drive comes on. I brought it into the tuner who installed this setup and was told that the Z32 ecu was not giving a tps signal to the attessa system. This was a surprise as I used a normal gtst ecu before the tune and the attessa system was working. Where can this tps signal be bridged so it is active?

Tonight I took the car for a drive and the AWD light did not come on and the cars driveline was working fine. Confused? Same here.

I am starting to lose faith in my tuner as I believe he has steered me in the wrong direction. I am also experiencing a high/unstable idle when randomly stopped even when the car is warm. The tuner believes this is due to z32 ecu characteristics. True?

Due to this problem I am also wondering if I should drop my front shaft as I am afraid of clutches being damaged?

Thanks,

Stefan

[Moodles2]

TPS issues are fairly common with the Z32 ecu, i remember reading about it in a thread awhile ago, something about the Z32 TPS behaving different from the R33 one. http://www.skylinesaustralia.com/forums/Ni...Z32+TPS+nistune

[paulr33]

yes your tuner is correct, this is the same for R33 GTST with Active LSD

The std ecu present in this model car - like your GTS4 is different, as it relays the TPS signal to the 4WD computer in the boot

the normal GTST ecu won't do this and thus the system fails. I had this issue on my ECR33 with Active LSD adn the fix was to find the wire that runs to the A-LSD computer in the boot and bridge it to the TPS signal wire, problem solved

without a TPS signal the 4WD/A-LSD system fails

[T04GTR]

yes. you need to grab a wiring digram and splice the attessa tps signal wire directly to the tps input to the ecu. if you have an auto z32 ecu it will have the output. but they can drop out. apexi pfc can do this to.

[Mr.Massive]

Four trips back to the tuner later and found the problem to be a earthing issue