 help is this ECU gonna work?, 7afe celi ecu in rolla (tranny swap) |
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 May 16, 2004 - 12:06 AM
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 Enthusiast Joined Jan 20, '04 From TN Currently Offline Reputation: 0 (0%)  |
ok check it out
i have a 97 corolla with the wonderful 7afe i have an auto w/ overdrive i am starting to collect parts to do a manual swap i found this ECU on ebay CLICK HERE TO SEE WHAT IM TALKING ABOUT it says in the description that it will work in a 94-95 celi im an guessing that the ecu will not work due to the fact the ecu is OBD-I and my car is OBD-II toyota changed over to OBD-II in 96 on the 7afe in the corolla's but im not sure if it was the same year for the celica's i guess it would work as far as the transmission is concerned but the rest of the car wolud probably be fuct BTW before any one asks why im getting an ECU for a tranny swap, the 4 spd auto w/ od is electronically controlled bythe ECU it wont work without the ecu from a manual car any help i greatly appreciated in advance later, JAY |
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May 16, 2004 - 12:23 AM
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 Enthusiast  Joined Aug 29, '02 From ny to philly Currently Offline Reputation: 0 (0%) |
check out corolla-racing.com if you haven't already. those guys would have a better knowledge of your car and the complexities of the auto->manual swap
as far as I know the celica changed to OBD-II in 96 so that ecu you linked would be OBD-I. however perhaps you could consider switched to an OBD-I ecu as they had more hp due to less restrictive diagnostics/emissions. I'm not sure of the complexity of this but its an idea nonetheless 
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May 16, 2004 - 12:30 AM
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Enthusiast Joined Jan 22, '04 From bellingham, WA Currently Offline Reputation: 0 (0%) |
you don't need to swap the ecu (as far as i know)..... i've heard there's more controls on the ecu's with overdrive... talk with racer25 on corolla-racing... he's done it (and i believe you need a 96-97 ecu... not because of obd issues... but because of others...)
i KNOW on a 3 speed auto you can use the ecu for a manual swap and the only downside is you get a dummy light turn on on the dash..... (and everything i'm saying is for a corolla) |
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May 16, 2004 - 12:36 AM
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 Enthusiast Joined May 15, '03 From Aurora IL Currently Offline Reputation: 0 (0%) |
someone had told me one time the auto ECU for the manual conversion wouldn't be all that great, because the fuel mappings or something similiar wouldnt be right.. i don't know if this is true, west_minst had mentioned it in a thread i posted about this a long time ago.
i might be totally wrong, or perhaps the ECU would compensate for it. it still might be something to look in to. |
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May 16, 2004 - 12:37 AM
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 Enthusiast Joined Dec 27, '03 From Nor Cal Currently Offline Reputation: 0 (0%) |
Actually... I think you do need to swap ecus. I'm not 100% certain... but on many cars... the TPS signals are read differently between each ECU (auto/manual). Anyways... yes... you should swap over to an OBD2 ecu just to be safe. This post has been edited by Kwanza26: May 16, 2004 - 12:38 AM -------------------- "It's ok to be naked girl... I'm an artist!"
1995 AT200 Celica ST: stocked out daily driver... 1984 AE86 Corolla GT-SR5: silvertop 20V 4AGE project car jacked up with goodies... 1991 SW2x MR2 n/a: bare bones hardtop model soon to be... |
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May 17, 2004 - 1:23 AM
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Enthusiast Joined Jan 22, '04 From bellingham, WA Currently Offline Reputation: 0 (0%) |
at least a 3 speed auto... which isn't electronically controlled... why would it matter? since the driver is doing the manual changing, the ecu doesn't care what gear the car is in..... and as far as the TPS, it'll only read whatever the TPS is sending it....
like i said, racer25 had his corolla running w/ the auto ecu and a manual gearbox after he swapped.... |
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May 17, 2004 - 11:38 AM
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 Enthusiast Joined Mar 2, '04 From Louisiana, USA Currently Offline Reputation: 2 (100%) |
On just about all cars, AT ECUs have different fuel and ignition curves that are more suited to the characteristics of the transmission. Since an automatic has (generally) fewer gears than the manual, the engine will be under more load at different points than it would be with a manual, and the fuel curve and ignition timing are calibrated for this. You could probably run an auto ECU in a manual car without problems, but it _may_ not be ideal.
If your car is OBD2, you won't be able to run an OBD1 ECU without modifying your harness, or coming up with some kind of adapter harness like the Honda guys have for certain engine swaps. All cars imported or manufactured for the US had to comply with OBD2 standards in 1996. |
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