idles fine, full acceleration seems great, but in between lots of ignition cutting out - '88 90 4 cyl

[Len & Bonnie Lubbers]

I just read Stacy Anable's post - Sick 88  80q.

I have an 1988 '90 4 cylinder.  I think a similar thing just started to
happen with my car on Friday night. I came home in messy weather: wet snow
and around freezing temp.

The symptoms were similar to wet ignition wires - under load the engine
begins to falter badly - with the exception being that if the gas pedal is
pinned to the floor, there was no missing or stuttering.  Everything under
the hood was bone dry, even the rotor and cap.   I also thought perhaps
gasline anti-freeze might help - but it did not.  (although with the engine
appearing to work properly under full acceleration, fuel troubles seem
improbable anyways)

Any thoughts?   How about the anti-knock sensor? - I am not familiar with
its operation.  How do you test it?

Len Lubbers
'88 90 4 cyl, 2wd
Ottawa, Ontario, Canada