I am with Paul on this.. I would find a good injector shop that does just injectors , pumps and Turbos.. Talk to them and get a date and time.. Pull the injectors.. They can test them on the bench.. Tell you if there is a problem with any of them.. What pressure they open.. If the spray is right or just a dripple.. and if they leak... and run Cleaner thru them.. If needed they can rebuild one or two to open at the same pressures as the others... If most are bad.. Let them rebuild them.. or sell you rebuilt ones that all open at the same pressures... Taking it to a shop and letting them change them just in case one may be bad is a waste of money.. Unless you just have money to spend.. And if one of the ones they put in is not right you will still have the miss and look at spending more money perhaps for nothing..

Ken