Jonathan,

I saw your post a few days ago. I'll paraphrase my recollection. You were not getting the output (ground level) needed to enable the fuel pump relay from your ECU, though you had replaced the crank angle sensor and substituted another ECU.

This made me want to ask you whether you knew your subbed ECU was a good one (and remained a good one after trying it). Then I went to my Bentley, 'cuz I could not draw from experience on this one, and traced several lines between the ignition controller and the ECU on the wiring diagram. One of them must supply the ignition waveform or an indication of its presence to the FI ECU.

If you do in fact have a good ECU, I'd look into the means the ignition controller uses to tell the ECU of that fact, given you can ground the ECU's fuel relay output (with your test lamp) and get the car to run. I am sorry that I do not know exactly how that is derived, but apparently, so far, no one else watching these posts does either.

Using guesswork, it could be that there is an open in the green/black wire that provides the fuel injection computer connection to the diagnostic unit. Whatever is causing this trouble might be common with the reason your ignition controller isn't telling your fuel controller to turn the fuel relay on (or did you get this solved?) and could be as simple as connector pins pushed out of their carrier. Could be corrosion caused by a windshield leak too, but I emphasize this is merely guesswork without tracing the cause with test equipment.

Have you examined the plugs on both controllers?

Art Benstein

79 244 118K, 83 244 162K, 84 244 291K, 89 245 160K, 90 244 142K
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Art Benstein near Baltimore