R34gtr Vspec Issue

[dead32]

hi guys, car is a r34gtr vspec,70xxxkm's

basic rundown of the issue with it:

most of the time happen's when hot on a freeway, although once it starts happening it wont stop..

always occur's at 2500rpm-3500rpm light throttle and light load, the car basicaly hesitate's and cough's/splutter's then clear's out and rev's fine,whilst it's playing up if you put ur foot flat it wont moove and if you press the clutch in it doesnt die just return's to idle and rev's fine.. never under heavy acceleration,alway's on cruise.

mods are: turbo back twin 3inch straight through exhaust including new cat,garret 2560 -5's "std boost controller,std boost,ecu.injector's,afm's",splitfire coilpack's,sard fuel pump and thats about it, all mods are less then 500km old on car,had this problem before any mods carried out and no mod has made the problem better/worse..

brand new plug's installed and gapped accordingly aswell as afm's ,intake pipe's cleaned spotless.

any help appreciated! any further question's i will try get back to you as best as possible....

[Beer Baron]

sounds to me like faulty 02 sensors. when they go it will cause the car to not run right under light throttle 'cruise' type conditions and gives the symptoms you describe. the good news is any good workshop can easily test them for you with 10 mins work. they just need to hook up a consult/scan tool to your cars diagnostic port and then they can check the sensors (there are 2, one in each dump pipe).

[R33]

sounds to me like faulty 02 sensors.

Bingo

Very common problem