2002 Buick park avenue 3800 v6
during a cold storm start if the year my car froze and woul just crank and crank no start mechanic said it was crank shaft sensor After having my crank shaft sensor replaced and air intake( it blew up trying to start with starting fluid in air box) I then needed the alternator(got new battery as well) weeks later it got replaced and it was running good but every time I started it through out the day it would stutter while starting got worse everytime and by the end of the night it wouldn’t start unless I gave it gas then the following morning it wouldn’t start at all my mechanic replaced the crankshaft sensor again didn’t do nothing noted he said he tested fuel pump and said it wasnt the problem and we tested to see if it was the fuel ejector things that spray out the gas it was good and wasn’t the issue
now these messages are what he is saying is wrong with it he is a retired mechanic but my uncle is saying this guy is just guessing stuff please help me I have been with out a car for sometime now and I need one before I start a new warehouse, is there any legit mechanic shop I could take it to and get it done in a timely manner this mec has had my car for over 3 weeks