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 Post subject: '89-'94 ECU
PostPosted: Sat Apr 09, 2016 9:51 pm 
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Joined: Sun Oct 24, 2004 6:53 am
Posts: 67
Location: Oshawa , Ontario, Canada
I've searched and found no answer.....is there any difference between the 13B ECU control units between '89-'94 ?


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 Post subject: Re: '89-'94 ECU
PostPosted: Sun Apr 10, 2016 12:22 am 
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Joined: Sun Dec 05, 2010 5:56 pm
Posts: 1017
Location: Wahiawa, HI
Yes there are differences, however, it doesn't matter which one you use, they will all plug and play unless you have an automatic--or a CA car with EGR, I guess.

The later ECUs, I2 (92-93) and I6 (94 only) make slightly more power, probably due to a slightly more aggressive timing map and faster processors. Unfortunately, offsetting that advantage is a bug in the code that can prevent the ECU from enrichening properly with the throttle until well after warmup--don't try to run one of the later cars hard until you've been driving 15 minutes or so.

Don't forget there are Euro-spec ECUs that are expecting input from a trim-knob rather than an O2 sensor (but will accept that too).

Even a Cultus ECU from those years will run an export-spec motor, but it wouldn't be a good idea as the maps would not be optimal and you'd get a code for a missing knock sensor.

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 Post subject: Re: '89-'94 ECU
PostPosted: Sun Apr 10, 2016 11:49 am 
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Joined: Sun Oct 24, 2004 6:53 am
Posts: 67
Location: Oshawa , Ontario, Canada
Excellent Info !
Thanks so much for clearing that up...........
Though the numbers are dwindling, this is still the place for great info .....and banter !!
Al


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