Jump to content
SAU Community

Rb25Det S2 Hessitates To Rev Up From Idle When Hot

slider_grub

By slider_grub,
in General Maintenance

 Share

Recommended Posts

slider_grub Apprentice

slider_grub

Posted
Posted

Hi everyone, I noticed my rb25 s2 (nissan cefiro a31) seems to be a little sluggish to rev up from idle in neutral. It sort of stumbles before the rpm climbs when I step on the gas. This only happens once the engine is warmed up and driven for a while. I already cleaned my TB ans IAC valves. Timing also adjusted by my mechanic. Engine is stock with open pod filter, aftermarket turbo manifold with 1bar wastegate and gtr fmic. Is this common when the air intake gets hot? I dont have a heat shield but will fabricate one soon.

koduRB25det Community Regular

koduRB25det

Posted
Posted

check your coolant temp sensor/switch resistance when car is hot. must be low. ign off disconnect the coolant temp switch and start the car[ when it hot] and rev it. see any different...

slider_grub Apprentice

slider_grub

Posted
  • Author
Posted

Ok thanks bro. will try it. since my IC pipes are routed right over them, the guy installing the pipes could have knocked it. Thanks!

Btw, can the afm readings get thrown off if it gets hot?

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • r32-25t
      2025 Osaka Auto Messe

      By r32-25t · Posted

      I’d love to find some where that can recover the dashes to look brand new and original. Mine has a very slight bubble, nothing compared to some I’ve seen though 
    • Rezz
      2025 Osaka Auto Messe

      By Rezz · Posted

      $170K. I asked one of the guys there as a joke if that price was just for the passenger seat as it was where the price sheet was... he tried really hard to crack a smile 😄 He also mentioned that every single part of the car was inspected and either restored or replaced with a new or as new part, or made from scratch. The interior was incredible, every inch like a new car.
    • Dose Pipe Sutututu
      R32gtr sputtering and stalling

      By Dose Pipe Sutututu · Posted

      Time for a modernisation, throw out the AFM, stock O2s, ECU into the e-waste bin. Rip out the cable throttle, IACV, pedal, etc. into the scrap metal bin. DBW, e-throttle, modern ECU, CANbus wideband, and the thing will drive better than when it left the factory.
    • MBS206
      R32gtr sputtering and stalling

      By MBS206 · Posted

      I agree, don't go trusting those trims. As I said, first step is to put the logger away, and do the basics in diagnosis.   I spend plenty of time with data loggers. I also spend plenty of time teaching "technicians" why they need to stop using their data loggers, and learn real diagnostics.   The amount of data logs I play with would probably blow most people away. I don't just use it to diagnose. I log raw CAN data too, as a nice chunk of my job is reverse engineering what automotive manufacturers are doing.
    • joshuaho96
      R32gtr sputtering and stalling

      By joshuaho96 · Posted

      I'm aware, but unless you're actually seeing the voltage the ECU is seeing and you're able to verify the sensors are actually working I find it hard to just trust STFT/LTFT. I will say, logging the ECU comes naturally to me because it's one of the lowest effort methods of diagnosis and I do similar things in my day job all the time. Staring at 20+ charts looking for something that isn't quite right isn't for everyone. NDS1 allows you to log almost everything so that's normally what I do and then sort out the data later. 
×
×
  • Create New...