Jump to content
SAU Community

Strange Hesitation/pause

cefiro

By cefiro,
in Engines & Forced Induction

 Share

Recommended Posts

cefiro Experienced

cefiro

Posted
Posted

I have been having issues with my car going into R&R mode I installed a PFC recently and had it tuned (unigroup), now what I have noticed is two tings my car now has a hesitation/pause, almost light somethings cutting the power this comes every now and again I think its always been there but its only noticeable with the power FC (don't think its in the tune). My knock reading on the power FC will go as high as 112 but the engine light does NOT come on at all. I think this hesitation/pause has always been there, but possibly the tune has made the hesitation more noticeable. Its seems to only do it on light acceleration. And the knock reading wont go above 38 at any other time. I am thinking the fuel pump is on the way out???????? Also the engine light attached to the power fc knock system is set at 60 is there a way to check its on/set at 60. Any suggestions?????

Link to comment
https://www.sau.com.au/forums/topic/229196-strange-hesitationpause/
Share on other sites
GeeTR Grand Master

GeeTR

Posted
Posted (edited)

First up, I'd talk to Yavus about what he thinks about your hesitation, as he clearly would have noticed it.

What turbos have you got - surge maybe?

PFC's don't have RR.

112 knock is bad, don't do it.

Datalogit / power excel to check the knock flash setting.

Fuel pressure gauge should show a f.pump weakness.

Edited by GeeTR
cefiro Experienced

cefiro

Posted
  • Author
Posted

I have std turbos, I know Power Fc don't have R&R it was doing it on my std computer it just wasn't noticeable (cant think of any other reason I was having R&R too coincidental) and sometimes it will have this hesitation and not read any knock ???? i would have thought Yahulz would have picked it up as well but they wouldn't do a power run on very light throttle and its intermittent, and as I said the power fc is not reading knock and showing me on the dash light as I have never seen the engine light come on. Dont have datalogit. yeah i should give him a call but i dont think its got anything to do with his tune its an unrelated problem but he is the man to see. its just miles away from where i live.

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

    • GTSBoy
      New kid on the block

      By GTSBoy · Posted

      The wiring diagram for the R33 RB25 is freely available, and is essentially the same same as most other RBs (just with differences as to which pin # does which job). To get the ECU to power up, you just need to provide power to the ECCS relay, and have the other power feeds that come in from the top left of the wiring diagram (wrt the ECU) that give perma power to the fuel pump relay, the ECU itself, etc etc, all connected. When you put power on all these it will just come to life. It's pretty clear from the diagram what needs to happen. Just follow the lines from the 12V + supply stuff in the top left over towards the ECU. I've even posted snips of such diagrams (not for vanilla 25, I think for Neo and 26) to various threads here in the last few months, talking about what it takes to get the fuel pump and FPCM up and going. Search these up and they will help get you started on doing the same with the vanilla 25 diagram. Hell, for all I know, I've done the same with that one in years past and have forgotten.
    • Duncan
      New kid on the block

      By Duncan · Posted

      Yep...so unless someone posts up the answer you will need to probe from the ECU connector to the dash plug with a multi meter in continuity mode to trace the wires.  Note the ECU has multiple - and + (and across different key settings - Battery, IGN and Start) and most likely the power is fed from the connector(s) that is normally near the left hand headlight.
    • Songo
      New kid on the block

      By Songo · Posted

      Thanks Duncan, I am actually just trying to get the Rb turning and running with the RB25DET S2 original loom itself  I am just trying to get it going outside the body and not thinking about the S15 or trying to match anything to the S15 loom at all I am only trying to see if anyone has done this and what pin they found to be the ignition trigger and ECU+/- on the dash connector, that's about it. Thanks  
    • iain_ST44GA
      M35 VQ25DET starter motor

      By iain_ST44GA · Posted

      Hi Guys, Does anyone know any aftermarket part numbers for a starter motor to suit the VQ25DET? I can find lots of alternative part number for the VQ35DE, which I assume would fit, but there is a lot of conflicting information out there. Thanks..
    • Murray_Calavera
      R33 GTR running -9 with no tune

      By Murray_Calavera · Posted

      I don't understand how this hasn't boiled down to - Upgrade the turbo when you have everything required. ECU, injectors, fuel pump, turbo, etc. Do it all at once.  If you don't have everything required, just enjoy the car as it is and keep saving up your pennies. 
×
×
  • Create New...