I recently had my intake manifold off to to clean and paint up on my 2000 Outback Legacy EJ251 SOHC

I also took off the wiring harness which of course means unplugging the injectors.

Being stupid I did not label these connectors up so I am unsure if I have plugged the correct connectors to the correct injectors.

1) Does it matter which way round they are plugged in
2) If it does matter then how to I find out which goes to which?
3) If it does matter and they are the wrong way round what would be the symptoms?

 

Can't be certain but around that time wiring colours as below

Inj #1 Yellow and Brown
Inj #2 Yellow and Light green
Inj #3 Yellow and Blue/ Red stripe OR Blue/White stripe
Inj #4 Yellow and Blue/ Black stripe OR Blue