Re-Mapped ECU Learning Trick 10-20hp in 5 seconds :)

Reply Subscribe

Thread Tools

Search this Thread

10-08-2004, 01:27 PM

#31

JT-STI

Guest

Posts: n/a

Actually, this trick does work for the STi!, when I disconnected my battery...I lost like 3 mph and .3 to .4 slower in the 1/4 mile. A 25 HP loss???, Since I did the trick, I got back what I lost, my car now runs 13.3s @ 100+ mph stock! Good tip Shiv! Too bad it doesnt increase HP, but it gets you back to where you oughtta be....

10-08-2004, 04:22 PM

#32

bryjb10

Registered User

Join Date: Nov 2003

Posts: 19

Sorry I am new with this car so if this is a stupid question please excuse. Does this mean that the ECU on the STI is adaptive?

10-08-2004, 04:26 PM

#33

kwiktsi

Guest

Posts: n/a

I had heard that whenever you start the car, it has retarded timing and it slowly advances as you drive. Is this true or were they talking about after an ECU reset? If I do this trick, would it stay or once it detects knock, pull timing and never advance again until reset? i am new to the WRX, so the "workings" of the ECU are still unknown to me

. Thanks.
Joe P.

01-04-2009, 04:51 PM

#34

ultrakomodo

Registered User

Join Date: Jun 2008

Location: philadelphia PA

Posts: 23

Car Info: 2003 subaru impreza wrx

thread CPR thread CPR thread CPR thread CPR thread CPR thread CPR
--------------------------------------------------------------------------------------

03 wrx TBE + UP + AEM intake

lets see now

will this take care of P0171 lean condition caused by an aftermarket intake?

01-04-2009, 05:48 PM

#35

Wingless Wonder

Registered User

iTrader: (7)

Join Date: Dec 2002

Location: Sacramento CA

Posts: 10,029

Car Info: 02 Impreza WRX sedan

Quote:

Originally Posted by ultrakomodo

03 wrx TBE + UP + AEM intake

lets see now

will this take care of P0171 lean condition caused by an aftermarket intake?

No. The first post in the thread describes what it does, which is to set the ignition advance multiplier only, not air/fuel ratio. It also states that if you are experiencing an actual lean condition (as indicated by a CEL), using the described technique may make things worse under acceleration or any load.

Remove the aftermarket intake and reset the ECU to get rid of the CEL. If you want to keep your intake, have your car professionally tuned and they can diagnose the CEL and check for an actual lean condition.

01-04-2009, 06:44 PM

#36

04caliwrx

Registered User

iTrader: (6)

Join Date: Mar 2006

Location: on the way to lake tahoe to shread! turbo beast

Posts: 9,581

Car Info: 2016 WRX, 2014 lifter forester XT, 2005 JDM207 WGN

wow a crazy old post LOL

01-04-2009, 07:35 PM

#37

ultrakomodo

Registered User

Join Date: Jun 2008

Location: philadelphia PA

Posts: 23

Car Info: 2003 subaru impreza wrx

Yes, i did it and at idle i did feel slight shuddering. I didnt do any sprints. I am going to reflash it again for 8 points!

I also wonder if duct-taping 1/3 of the airfilter and a reflash will solve the problem.

I also wonder if by using JB weld, (isnt it already interesting?) reducing the diameter of the intake tubing to stock. around the MAF only with a tapering form of 1 inch -+ before and after the MAF sensor.