Control unit acceleration and enrichment

[Talonz82]

What do you folks know about this? I found it on an 82 sc wiring diagrahm, does a 1980 have it also? When does it come into play? after warm up in the closed loop mode? or is it always on line?

[john walker's workshop]

the oxygen sensor input is dropped when the throttle approaches wide open. the computer gets a signal from the switch on the throttle housing.

[Talonz82]

Thanks John, studying my diagrahms and tracing wires led me to that very answer, I don't know why my books jump over the 1980 model,

Here's a good one, I think I have come to the end of my journey, when the car is not running and i have the key in run, I lift the sensor plate and hear the freq valve, I asumned this meant it was good, until i put my finger on it and WHAM....I got shocked, so just to verify i stuck my finger on it again, yup shocked again, now this cannot be right, I removed it and tested per the book, it clicks like it should, this can't be right can it?

[john walker's workshop]

wierd! maybe a plug wire is shorting out to a piece of metal that's in the vicinity of the freq valve. unplug the relay under the passenger seat and finger test it again.