Celica Forums General Discussion Exterior Piggyback ECU

After some serious mods, i thought a piggyback ECU would do some good to the A/F and ignition. Got Greddy's eManage wired up and on a Dyno machine.

Ignition, no problem. But when I tried to lean out the A/F, the bloody ECU keeps reseting itself back to the orginal setting.

I would like to know if anyone out there had a similar experience? Anyone out there hooked on to a Piggyback?

Here in Singapore, some blokes are using the Buddy Club ECU which is also Piggyback. Let me know your experience.

Cheers.

http://www.celicasg.com

See the trick is the O2 sensor thats messing everything up, its not just MAF sensor thats messing things up.
The MAF sensor will sense amount of air and when the O2 sensor senses there are more fuel it will adjust the ECU, I know a lot of people is going to say when WoT it is closed loop but then by the time you at at WoT the ECU already adjusted settings.
you will find this problem with more expensive E-Management also like the AEM one, however there is 1 unit that will solve all your problem. Try Split Second FTC1-E unit, it sends stock signal to the ECU so the ECU think everything is normal but you can still make adjustments by the piggyback. Their website is www.splitsec.com [splitsec.com] look for FTC1-E unit, and if you take out the Catalytic converter add ESC2 unit which will send stock signal to ECU deceiving the ECU that the cat is still there.
Sometimes solution to your problem is not an expensive solution FTC1-E is around $600 U.S. but the shipping to Singapore is going to be quite a few bucks.

with the unit from split second yeah... does it come with the software? I will need it to tune it.

secondly, its a piggyback right?

The website from splisecond does not show a product meant for the Celica.

Yes it is a piggyback, I have it on my turboed GT and its working great. Yes it does come with a software which is loaded to a laptop linked by a cable, you can use dyno to tune it at a specific setting. For an example if you have 1 setting for street use with regular fuel, when you are at track you can upload higher air fuel values for race fuels. You can hold as many setting as you want on your computer and to change the setting on this computer it only takes 10 seconds to upload.

ok here is the main reason why ECU keep readjusting, and this is coming from Mark at Split Second:
Note it says main reason so there may be other reason, but it seem to work on David Drapers turbo setup so it should be as it says