New Coil Packs, wont start now

[mchlwllms94]

Just got my first Z car, a 1990 300zx. It came misfiring in the two rear cylinders. I replaced the two rear coil packs and now I can't get the car to start at all. It cranks but doesn't seem to catch. Does anyone have any advice on what my next step should be?

[DCaff300ZX]

You most likely have corrosion issues with either the coil connectors or the injector connectors or both, and more possible with the IACV and PTU harness and CTS sensors.
Check all for corrosion and clean, check for broken wires/continuity, and also check for large vacuum leaks (cracked/broken intake pipes, missing/cracked vacuum hoses) before spending money on more parts, and BTW- how did you determine to buy the new coil packs, and which ones did you get and where?