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Yes it is!
What concerns me from here is what else could be off?
The timing light and its spark are being fired off the flywheel by the CPS. For the moment we have to agree that the flywheel and its notch are doing things correctly mainly because it's all working.
The most common thing to throw things off would be the timing belt. But! of course, someone may have "tried" to correct it by rotating the distributors housing.
The bolt that holds down the distributor should be just to the left of being centered in the bracket. On my 91, there is an elongated plate under that bolts head. To the left of that I can see about 3/32 of an inch of the slot showing.
You may want to take a quick look to if you are in the "ball park" there.
Meaning, not so much anything to do with ignition timing but having the post terminals of the distributor aligning or centered up with the width of contact face, that's made into rotor button, when the pistons are at their TDC. The spark needs a duration path for that much distance giving up by the rotor button. Its a process, for about 80 years, to deal with the plus and minus thing and not just electricity! (:-)
The timing of the distributor is set first by locating its drive gear orientation along the path of the timing belt.
There is a dot on the face of the gear that has to be lined up with a mark at the three O' clock position on the plastic timing cover when the crankshaft and camshaft marks are properly aligned on the engine block.
Most of the time a mirror has to be used to reflect that gear face upwards into ones eyes to see the alignment alongside the raised groove. I understand your winking issue and thought I could throw that at you. (;-)
You can remove only the top portion of the timing cover and with a brightly directed light and spot all the of the most accurate "blocks marks inside" there.
The number one cylinder at TDC "O" ( the outside "reference only" scale to the pulley) on the compression stroke to check it out. Damper marks can move on these cars, unfortunately.
If needed, you loosen the tensioner and reset the distributor or camshaft if needed.
The lobes of the camshaft will be pointing upwards at you on TDC and the mark should line up with notch on the covers back plate.
Until you can confirm the engine is in a "timed mechanical state" with the CPS, the knock sensor electronics will have to be left out of the picture.
Time to lean over the radiator and see if some hugs will help you find something! (-:)
Phil
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