Jump to content



Magna mpi finally! Iat correction?


  • Please log in to reply
4 replies to this topic

#1 boostinmini

boostinmini

    Established Member

  • Members
  • PipPipPip
  • 931 posts
  • Gender:Male
  • Location:Calgary, Alberta
  • Interests:G54b, 4G63, anything mitsubishi especially pre 2000s, custom fabrication and mountain biking.
  • Model:Other

Posted 09 April 2019 - 05:55 PM

Hey guys, got my magna running!  So awesome, ms1 v2.2 edis water meth, had a decent base tune going with approx 11.5 afr under boost, now today a bit warmer out, it was very lean under boost, approx 13afr..

Any ideas?

http://www.mez.co.uk/ms15-new.html

This sounds like my problem





#2 psu_Crash

psu_Crash

    Advanced Member

  • Members
  • PipPipPipPip
  • 7,291 posts
  • Gender:Male
  • Location:Lawrenceville PA
  • Interests:400+ WHP 450+ WTQ!!... and curves with green eyes
  • Model:Starion

Posted 09 April 2019 - 07:25 PM

I ran mine initially without an IAT sensor hooked up. Once I did it was undrivable. It will make predictable changes, but your tune will need significant changes. Shoot me a PM with your email and I can send over a copy of my current tune to give you an idea
'86 Starion, MPI with MS2extra, Turbo Lab GTX3071R, P&P head, OS SS Valves, Wiseco +.030, ARP head/rod, RPW Roller Cam, Crower Rods, AEM H2O/Meth Injection, Mighty Max CAS 4 Direct Fire Wasted Spark, BSE, Tial 38mm, JDL exhaust mani, HKS turbo timer and EVC3, AEM UEGO, 3" DP into 2 1/2" Dual Exhaust, 85# Delphi's, Magna modded by Chad, Accufab FPR, Walbro 255, D2 Coilovers, GNT Poly Bushings and mounts, Autopower 4 point cage, Funk-Lock, LED Tails and Dome ... etc^4
2016, 17, 19 SCCA Solo, Glen Region Season Champion in Street Modified
The Valencia Project
http://www.starquest...+golden +dreams
My Feedback Link
Posted Image

#3 scott87star

scott87star

    Technically Challenged, Daily.

  • Vendors
  • PipPipPipPip
  • 5,068 posts
  • Gender:Male
  • Location:Mandan, NORTH DAKOTA
  • Interests:Freezing, thawing, thunderstorms and constant wind.
  • Model:Starion

Posted 10 April 2019 - 09:07 AM

No, that's not your problem, where do you have the IAT mounted?
Now selling true plug and play megasquirt!  Absolutely the best value in stand alone ECU's out there.

I can upgrade your Fuel Injection Pro firmware

Performance Coatings!  Pistons, manifolds, bearings and more!

Now a graduate of EFI University!  www.efi101.com

ECU Vendor link:  http://www.starquest...howtopic=137426

#4 psu_Crash

psu_Crash

    Advanced Member

  • Members
  • PipPipPipPip
  • 7,291 posts
  • Gender:Male
  • Location:Lawrenceville PA
  • Interests:400+ WHP 450+ WTQ!!... and curves with green eyes
  • Model:Starion

Posted 10 April 2019 - 09:59 AM

I have the IAT after the meth injection. I'd advise doing the same.
Like Scott said, where is yours?
'86 Starion, MPI with MS2extra, Turbo Lab GTX3071R, P&P head, OS SS Valves, Wiseco +.030, ARP head/rod, RPW Roller Cam, Crower Rods, AEM H2O/Meth Injection, Mighty Max CAS 4 Direct Fire Wasted Spark, BSE, Tial 38mm, JDL exhaust mani, HKS turbo timer and EVC3, AEM UEGO, 3" DP into 2 1/2" Dual Exhaust, 85# Delphi's, Magna modded by Chad, Accufab FPR, Walbro 255, D2 Coilovers, GNT Poly Bushings and mounts, Autopower 4 point cage, Funk-Lock, LED Tails and Dome ... etc^4
2016, 17, 19 SCCA Solo, Glen Region Season Champion in Street Modified
The Valencia Project
http://www.starquest...+golden +dreams
My Feedback Link
Posted Image

#5 speedyquest

speedyquest

    Established Member

  • Members
  • PipPipPip
  • 4,338 posts
  • Gender:Male
  • Location:La Crosse Wisconsin
  • Interests:bmx, cars, computers
  • Model:Starion

Posted 10 April 2019 - 10:09 AM

Another thing, having your AIT mounted on your intercooler piping before your throttle body stops the sensor from getting heat soaked if its installed in the intake manifold.

Posted Image





0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users