Auto repair

We took our 2005 ford focus to them to get repaired. I explained very clearly that I wanted the vacuum purge pump installed along with a pcv valve, change the oil and filter and replace the injectors. Also to make sure the vacuum hoses were correct and to install a new gasket kit on the intake. I was told I had a bad fuel rail pressure sensor and that was the cause of the problem. They replaced it, THEN was told it was a bad catalytic converter. I replaced that. They did not change the injectors but said they did on receipt. They did not change all the intake gaskets like I requested. They did not change the oil filter, and kept the one I provided. They were going to keep my injectors until I asked about them. I was told they have no way of figuring out the vacuum routing except from the pic under the hood. I'm not 100% sure they changed the oil, as it is dirty. Now I am told to replace injectors. They seem to just want to replace parts without finding out the root cause of WHY they need replacing. Dishonest. I now have over $400 in parts I didn't need and $200 in their labor and the car is exactly the same, if not worse. GO ELSEWHERE!!