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> Auto 3S shifting on it's own., New ECU did the trick.
post Jun 16, 2007 - 1:37 PM
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WannabeGT4



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My car is shifting on it's own now. I installed a new 5S ECU for the transmission this morning and took it for a spin and everything worked... 1, 2, D, OD. I'm still not 100% sure what went wrong with my stock ECU but it probably has something to do with my uncle "helping" the day I made the bracket for the ECUs.

The shift points seem higher than they were stock for some reason. I assume it's because of the different igniter. This is fine with me though the 3S power band is higher than the 5S anyway.
EDIT: Now that I think about it, this was probably due to my jubilation causing me to keep the gas pedal mashed to the floor.

When I was trying to get my stock ECU to work I connected more signal lines to the ECU than are probably needed, so I'll more than likely try removing as many wires going to the 2nd ECU as possible and see what the bare minimum is to make this work.

Funny thing is it took me all of 20 seconds to plug this thing in and I've had the new ECU since the beginning of the year... Talk about procrastination.

This post has been edited by WannabeGT4: Jun 16, 2007 - 1:41 PM


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Posts in this topic
- WannabeGT4   Auto 3S shifting on it's own.   Jun 16, 2007 - 1:37 PM
- - Culpable04   congrats man ! you did it. now show us som...   Jun 16, 2007 - 3:25 PM
- - WannabeGT4   I'll try and get some vids up in the next coup...   Jun 16, 2007 - 5:13 PM
- - Batman722   glad to see you got it shifting properly. BTW, h...   Jun 16, 2007 - 5:19 PM
|- - WannabeGT4   QUOTE(Batman722 @ Jun 16, 2007 - 5:1...   Jun 16, 2007 - 5:35 PM
- - Supersprynt   QUOTE(WannabeGT4 @ Jun 16, 2007 - 2...   Jun 16, 2007 - 6:18 PM
- - devilsden97   your using the stock S54 tranny correct? whats yo...   Jun 16, 2007 - 6:40 PM
- - jgreening   congrats Justin. Now get a decent intercooler.   Jun 16, 2007 - 9:38 PM
- - WannabeGT4   QUOTE(devilsden97 @ Jun 16, 2007 - 6...   Jun 17, 2007 - 9:24 AM
- - trd94   soo.... you have a auto 3sgte swap right. that is ...   Jun 17, 2007 - 10:33 AM
- - devilsden97   When your at full boost, what is it? When do u re...   Jun 17, 2007 - 11:14 AM
|- - WannabeGT4   QUOTE(devilsden97 @ Jun 17, 2007 - 11...   Jun 17, 2007 - 2:03 PM
- - devilsden97   QUOTE(WannabeGT4 @ Jun 17, 2007 - 3...   Jun 17, 2007 - 3:14 PM
- - lagos   get this idea out of your head migga! lol   Jun 17, 2007 - 3:31 PM
- - WannabeGT4   QUOTE(devilsden97 @ Jun 17, 2007 - 3...   Jun 19, 2007 - 10:18 PM
- - devilsden97   ^im half batting it around in my head. but im also...   Jun 19, 2007 - 10:25 PM
- - lagos   its been done before by the 5th gen guys. from wh...   Jun 19, 2007 - 10:36 PM
|- - WannabeGT4   QUOTE(lagos @ Jun 19, 2007 - 10:36 P...   Jun 19, 2007 - 10:40 PM
- - lagos   werd   Jun 19, 2007 - 11:17 PM
- - ILuvMyCelica95   QUOTE(lagos @ Jun 17, 2007 - 4:31 PM...   Jun 20, 2007 - 12:54 PM
- - EvolutionOX   Im gonna try this same swap could you type out her...   Nov 11, 2007 - 6:42 AM
|- - presure2   QUOTE(EvolutionOX @ Nov 11, 2007 - 7...   Nov 11, 2007 - 7:53 AM
|- - Kadett   QUOTE(presure2 @ Nov 11, 2007 - 1:53...   Nov 11, 2007 - 8:26 AM
|- - presure2   QUOTE(Kadett @ Nov 11, 2007 - 9:26 A...   Nov 11, 2007 - 8:35 AM
- - WannabeGT4   Forgot about this thread. Second gear is pretty m...   Nov 11, 2007 - 9:47 AM
- - Kadett   I'd say swap to manual, dont like the idea of ...   Nov 11, 2007 - 9:56 AM
|- - presure2   QUOTE(Kadett @ Nov 11, 2007 - 10:56 ...   Nov 11, 2007 - 10:01 AM
|- - Kadett   QUOTE(presure2 @ Nov 11, 2007 - 4:01...   Nov 11, 2007 - 11:11 AM
- - lagos   swap to an s54!   Nov 11, 2007 - 2:02 PM


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