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Coil is in front of the driver's strut tower.
Neither of the spade connectors I'm trying to identify is hot, no matter what position the ignition switch is in.
I think you're right that the red one is for testing the Lambda-Sond frequency valve. I'm going with this conclusion unless I learn differently.
As far as the green wires to the single spade connector: I don't know what they are yet. There's nothing on the car that doesn't work as far as I know, except that the AC loses refrigerant and doesn't blow cold. I works though, as far as the electical components, etc., as far as I know.
What I'm really trying to figure out is how to make it idle more smoothly. That's why I'm investigating these wires. I'm glad the red one is probably for testing the frequency valve to see if the idle mixture is set correctly. I gather from Bentley that there's a screw on top of the air sensor unit, but the screw access is blocked by a plug. It looks like I'd have to separate the air flow sensor from its lower housing just to remove the access plug. Is there an easier way? Needless to say, I hope the test of the frequency valve shows a perfect idle mixture. Actually, I'm not even sure the rough idle is related to the fuel/air mixture now that my vacuum leaks are fixed. Maybe the rough idle is electrical. I don't know how to trace it. I'm learning a lot in the process of all this.
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Thanks everyone for the advice. 81 242 Brick Off Blocks, Turbo bars and wheels, B21F, M46; 86 244, B230, 148k , auto.
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