Sir regarding injector nozzle :, due to a bad experienced about clogged or bad spray pattern, would you recommend to check first the cleaning of an injector fluid preferably before a long provincial sunday trip in order to avoid unnecessary problem and just how much is the prevailing nozzle cleaning service fee and do i have to watch out for the technician as the tip might be replaced? TIA

If you are you thinking of using an injector cleaning fluid, I don't know if it really works.
Dirty nozzles can sometimes be cleaned; faulty nozzles cannot be cleaned.