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84 ecu codes!


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Depends on the Carb/FI setup.

 

If it's a feedback carb......I would just unplug the stupid ECU and Probably not doing squat anymore anyhow. 

 

But uh...ussually in the "emissions control" section of the FSM's.

 

Oh and if the green diagnostic connectors are hooked up (or the black read ones) you will get the light coming on.  Unplug them for normal driving

Edited by Gloyale
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  • 5 months later...

well months later i thought id update this, i had unplugged the ecu, and am running a Weber, and it started running worse and worse so a month or two later i remembered i unplugged the ecu , so i plugged it back in and she ran great again, apparently the disty needs it, undid the green test connectors no more light.

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The ECU has no connection to the distributor. None whatsoever.

 

GD

 

 

Well,not quite.

The ECU receives a RPM signal from the distributor.The wires connect at coil negative.

Hard to imagine how that would be significant here,but,one could remove the ECU wire from coil negative to see.

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Ok, then why on an ea81 with a Weber carb, would it run fine, unplug the ECU and it run like dogshit, acted like timing was off or bad cap/rotor, then plug ECU back in and it magically run great again?

 

 

Probably because your choke heater is unpowered w/o the ECU.

Test it w/your meter.

You need to trigger the choke relay elsewise if you don`t want to use the ECU.

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