Jump to content

Welcome to Ultimate Subaru Message Board, my lurker friend!

Welcome to Ultimate Subaru Message Board, an unparalleled Subaru community full of the greatest Subaru gurus and modders on the planet! We offer technical information and discussion about all things Subaru, the best and most popular all wheel drive vehicles ever created.

We offer all this information for free to everyone, even lurkers like you! All we ask in return is that you sign up and give back some of what you get out - without our awesome registered users none of this would be possible! Plus, you get way more great stuff as a member! Lurk to lose, participate to WIN*!
  • Say hello and join the conversation
  • Subscribe to topics and forums to get automatic updates
  • Get your own profile and make new friends
  • Classifieds with all sorts of Subaru goodies
  • Photo hosting in our gallery
  • Meet other cool people with cool cars
Seriously, what are you waiting for? Make your life more fulfilling and join today! You and your Subaru won't regret it, we guarantee** it.

* The joy of participation and being generally awesome constitutes winning
** Not an actual guarantee, but seriously, you probably won't regret it!

Serving the Subaru Community since May 18th, 1998!

Guest Message by DevFuse

- - - - -

Fuel cut question

impreza 2005 ts turbo 1st stage fuel cut

  • Please log in to reply
1 reply to this topic

#1 M@nos_krt



  • Members
  • PipPip
  • 16 posts
  • greece. iraklio crete

Posted 08 February 2014 - 10:30 AM

Hi, I recently remapped my 2005 ts turbo and added a larger air intake, I noticed that pressure was the default 0.2 bar. The performance is noticeably better so i,m sure that the tuner didn't fool me. The reason of my post is that I tried  to raise pressure to 0.6-0.7 bar but fuel cutter hits at 0.5 bar. I took it back and he explained how the MAP sensor works and ecu cuts fuel (mine is a Hitachi PS60-01 boost sensor). he plugged a pda to the OBD and messed with the values(dont know exactly what he did) and told me to test again. I did, with same results. Next thing he did was to connect a zener diode (4.7 v) -see attached pic---Attached File  20140207_200821 (1024x768).jpg   104.13K   1 downloads to fool the sensor but failed again. I tried myself with 4.3 ,3.9 even with 3.6 and car couldnt accelerate so I stopped. Nothing can raise the limit of the cutter and it seems that something else intervenes. {There is a temp sensor after the air intake filter, connected to the boost sensor but dont know if has anything to do with it.}

Does anybody knows what is going on, a solution maybe?


PS. I just need to go only 0.1-0.2 bar over the fuel cut limit, not anything extreme.

Edited by M@nos_krt, 08 February 2014 - 10:46 AM.

#2 M@nos_krt



  • Members
  • PipPip
  • 16 posts
  • greece. iraklio crete

Posted 09 February 2014 - 11:22 AM

I know I answer my own question but in order to help others that have similar setup I found out that the fuel cut occurs not by main ecu but by a parallel ecu that monitors pressure via  vaccum solenoid. so boost controller has nothing to do with it. I have been also told that over 0.4 bar is a no go with my current setup (I need forged pistons, oil pump, gas pump, bigger intecrooler to reach 0.7 safely) :(

Edited by M@nos_krt, 09 February 2014 - 11:23 AM.

Also tagged with one or more of these keywords: impreza, 2005, ts, turbo, 1st stage, fuel cut

0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users