Amskeptic wrote:I know there is a ignition signal wire from the coil #1 (-) to the ECU.
Colin
That's the one. It was completely off. I may have said AFM when I meant to say ECU.
Considering the condition of the harness as I saw it, crumbly with many 'broken' insulation spots and taped up all over the place, I would recommend sourcing the harness and starting from scratch
http://www.kyleautomotivespecialties.com/products
-or-
get in there and repair the harness you have now. Shrink wrap broken insulation areas, replace bad connectors, check each connector for connection and fraying, splice in jumper spots for short connections (like the signal wire from the coil to the ecu). Solder any that you can. This can be done by you. Take pictures of your current connections for replacement reference. A good repair job here may help avoid future troubleshooting woes...
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just replace the one injector connector while you enjoy the camping season and keep an eye out for a harness at a upull...
Question for the group: Why would the decel valve, when connected to the (plenum) vacuum, make the idle go up. It will also kill the engine if the airflow from the decel valve to sboot is cutoff while it is hooked to vacuum (and idling fast). When not hooked up to vacuum the decel valve has no impact. I am trying to understand the theory behind the decel valve. (it is germain to Kubelwagon's issue here so this is not a threadjack).
So it all started when I wanted to get better gas mileage....