I would do as already discribed, but not go after the Opti until after you rule out the easy stuff. Replacing the opti is not cheap!
Check for spark on each cylinder and check fuel pressure is holding. A test light for spark ( you can use a timing gun ) and a fuel gauge and Niod light are fairly cheap and always a useful tools to have. I would start looking at the cheaper parts first that as probably in need of replacement regardless. Check the wires and plugs. Are they the originals?
If you think it could be an injector the stock 24lbs are easy to get, I have a set of 24lbs from a 96SS if you need them.
John
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93Z M6 Black: The 385 Lives! Supercharged, 3-core front mount intercooler, GTP heads, 3:73's, Street twin clutch, Jethot Longtubes, Mufflex 4" catback/spintech, S+W cage, Spohn Suspenion, Yada Yada Yada
1) Build it
2) Race it
3) Break it
4) Repeat!!!
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