I think his is a 79 so CIS.? Can't remember if the individual injectors have screens, but there is one at the inlet to the fuel distributor that can be cleaned.?
I've had success identifying marginal injector by tapping at the base of the injector to see if the stumble clears up.?
You can also just pull and replace them (I think Roger 928srus sells them) as an option, but that gets expensive.
Did the driving not clear it up?
