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Legacy engine swap
Posted 28 September 2004 - 12:49 AM
For example, since I am keeping the manual transmission I will need a pilot bearing. Is the pilot bearing in the flywheel or the end of the crankshaft?
Also I assume I should keep the ECM module that goes with the manual transmission, i.e. the 91.
Also the 90 has cruise control--the 91 does not. Any problems here?
Posted 28 September 2004 - 07:38 AM
Posted 28 September 2004 - 08:09 AM
The 90-91 MT's & AT's had different injectors, MAF's, coil packs, ignitor, and IAC valves. The main reason being is that the AT's have a JECS ECU, while the MT's have a Hitachi ECU.
Here's what "I" would do. Take the ECU out of the 90 legacy, and swap it into the 91. You'll need to make sure you swap the AT MAF & ignitor over to the new setup. Also, the "diamond" coil pack from the MT cars tend to handle a little more power, so I'd keep the diamond coil pack and put it on the AT motor.
If you do all that, you "should" be fine. The ECU's wiring has an AT/MT identifier pin. Depending or not if this pin is grounded, it tells the ECU that it's an AT or MT. So the wiring should be good....and you'll just have to plug in the 90 ECU.
I have a technical packet for the 90 legacy. It lists the differences in sensors. I'll verify that the sensors I listed are the only things that are different.
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