I remember someone doing this recently, but couldn't find a thread-

there was a '90 in the u-pull-it, so I grabbed the ECU, sensors, and engine part of the wiring harness. It all looked VERY familiar after working on a couple of '89's. My FSM is for an '89, so I haven't compared diagrams yet to see if it's a plug- in swap.

The only real advantage that I saw was that the '90 was reputed to be sequential injection vs. the '89's batch injection. Well, that, and I could block off the EGR, too...

But I opened the ECU (and fixed the leaky caps) and it doesn't look as though there are enough drivers to run the injectors sequentially AND the IAC.

So, 2 questions (finally <img src="/forums/images/graemlins/rolleyes.gif" alt="" />)

1: is it a plug- in swap if I change the engine wiring harness (right side)?

2: is the 90- 91 really sequential?

Thanks,
Toby (stuck at work tonight with an internet connection and little to do...)
<img src="/forums/images/graemlins/drunk.gif" alt="" />