meissen

Does anyone have the image showing the firing order of the optispark? I know I've seen it all over the place and I need it right now but I can't find the image for the life of me. Don't know what I need to search for - tried optispark firing sequence, optispark firing order, optispark sequence, optispark order, optispark spark order ... can't find it. Basically what I'm trying to do is I have my optispark's cover off and I want to know exactly what position my optispark is before I pull it off or else I'll pull it off and not know what position it was in and hence not know if my index was off.

bombebomb

I have it on my haynes book, or whatever its called, ill edit this post in a moment.


google is your friend (it is correct according to my book)

Also, on the left side, that is a 6 not a 7 written all funky.

madhatter

If it is a factory cap it is actually on the cap.

Also there is only one way to put our distributor on. Can't really mess it up.

MikeGyver

That sounds like a bet to me.

twcblackhand6970

Maybe he doesn't know where the wires go?

Nevermind, reread post

Injuneer

At least 10% of the Opti's are installed incorrectly, both the splined shaft drives and the pin drives. Its actually very easy to do. Check meissenation's other post, where he finds out that's exactly what he did, without exerting any undue force to seat the Opti.

https://www.camaroz28.com/forums/sho...d.php?t=688096

meissen

Thanks for the image but that wasn't the one I was thinking of. I was thinking of the one where it shows what each post on the inside of the opti corresponds to which spark wire. I had the cover off of the optispark while it was still mounted to the engine so I was curious which cylinder it was getting ready to fire where the T-prong thing was. It was aimed at 5:00. The crank's dot was at about 2:30. When I pulled the optispark off of the timing cover it helped that I had the cover off because then I was able to hold the rotor in place so it wouldn't spin and I was then able to verify that it was 120* off.

Hehe want to bet? Mine slid right on and it turned out to be the wrong slot. When I realized it was wrong I was really tempted to JB weld the other slots in so it won't happen again

shoebox

http://shbox.com/1/opti.jpg

matLT1

It uses the standard chevy firing order of 1-8-4-3-6-5-7-2

meissen

Yeah no I'm talking about the little studs that are on the cover of the opti itself. Someone has a picture where the tan part of the opti has the firing numbers drawn in.. on the circular tan-green portion of the cover there's numbers in a circle that says which cylinder the opti is firing when the metal rotor tip makes contact with the stud in the cover.

The image I'm looking for shows what each of these little studs corresponds to:

shoebox

Again, my site has this... http://shbox.com/1/opti_cyl.jpg .

meissen

THAT'S THE ONE!!!!!! Man, Rob, I love your site but I always have a problem getting to these images. What section was that listed under?

shoebox

Under "Component Location Views" , item 51, listed as "1995-1997 Optispark front view with cap cylinder terminal location markings". Right in the section with all the other opti views.

Injuneer

Some of the best data on the Opti construction is shown in pages 60-63 of the book "Corvette Fuel Injection & Electronic Engine Management" by Charles D. Probst (ISBN 0-8376-0861-9; GM part # 12497977). Detailed info on the cap with an X-ray showing the internal wires that route the individual buttons to the wire towers, a diagram of same, details of the cylinder assignment and specifc degree length of the low resolution slots in the optical disc, square wave output pattern for the low res pulse, etc.

I'll see if I can scan a few of the photos, diagrams, etc.

shoebox

You mean scribbling on the cap with a Sharpie is too low tech?

Sigh...so much research down the drain.