
Originally Posted by
Dale
1990 MR2 - assuming you mean SW20 - was gen 2 3sge. ECU will not work with a celica gen 1 3sge.
If you're that keen on keeping the gen 1 in there and want to do something with the ECU, get either a JDM st162 ecu, or go aftermarket. Any performance gains will be fairly minimal unless you do supporting mods to the engine.
XR_Pilot on these forums did some back to back testing of different ECU's for gen 1 3SGE a year or two ago, I think the results of them are in the ST162 dedicated thread in general car area if you search for it.
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