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Q: misfire on 1990 Infiniti Q45

i have a misfire in two coils that i changed already what could it be
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Mark the coils so you can identify them, try swapping the coils to another cylinder and see if the problem follows the coils to another cylinder or does the cylinder you identify now as missing still have a misfire. If after swapping the coils the cylinder doesn't pick up see if the coil has power and is being triggered by the computer if not the wiring or computer has an issue. Autozone have some popular workshop manuals for free on line once you register (for free) on their website or there is a company that independent auto repair shops "buy" their information from that offer a very reasonable service to do it yourselvers. You can get a one week subscription or year subscription very cheap. The information is year make and model specific repair procedures, service bulletins, component locations, wiring diagrams ect.... great quality information same as the professionals have ,much better than generic workshop manuals from parts stores, much cheaper than the factory manual try
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