When changing the engine over from rev1 to rev3/4 why do i need change the ECU?

Discussion and technical advice the SW20 MR2. 3S-GTE, 3S-GE, 3S-FE etc
Anything and everything to do with maintenance, modifications and electrical is in here for the Mk2.

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vrooom
Posts: 16
Joined: Sat Mar 02, 2013 6:53 pm

When changing the engine over from rev1 to rev3/4 why do i need change the ECU?

Post by vrooom »

when I can change all the engine connectors like throttle/oil pressure/knock sensor/etc from rev1 engine and still use rev1 ecu?
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Tsia
Posts: 1569
Joined: Fri Sep 23, 2011 9:12 pm
Location: Milton Keynes

Re: When changing the engine over from rev1 to rev3/4 why do i need change the ECU?

Post by Tsia »

AFM issues, for a start.
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jasongtr
Posts: 4583
Joined: Thu Jul 16, 2009 7:55 pm
Location: normally under a car

Re: When changing the engine over from rev1 to rev3/4 why do i need change the ECU?

Post by jasongtr »

mechanical speedo sender too on rev1 - would that cause issues?
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