was told a new ignition switch has to have new keys Had car worked on, new ignition switch, but still uses old key. I was told if it didn't have a new key, then the man didn't put in a new switch, whch Ididn't think was wrong to start with. Also, what does the sender do for the car? Told it makes gas hand work. New one put on but as hand isn't working. Thanks for help

how do replace a positive cable that attaches to the starter

A mechanic replaced everything listed here: the battery,alternator,all the cable and connections,and also the PCM (power train control module).He has had to reinspect my vehicle because the car will not restart back up again. What is causing this? Everytime I try to start up my vehicle, its dead and wont start. I then get a jump from someone. I let the car run and let the battery recharge up again. As soon as I shut off the ignition whether its off for hours or two seconds, the vehicle refuses to restart back up again until it is jumped by another car.What is caausing this problem?