If you have a misfire in almost all cylinders then it's something in common.

the injectors all use a common 12V to them and the computer switches the ground on the fuel side. I believe those engines had a plenum leak issue that might be something to look at too.

On the ignition side there is a lot more in common electrically.

I would look in those areas first. Cap, rotor, coil, etc.


They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.