I have had a Nissan altima which about 4 months ago started to have ignition coils go out. The mechanic i took it to repaired a few of them. The codes were something to do with the camshaft sensor and misfiring. The car would become incapacitated and only be able to go no more than 5 miles an hour. He said that he repaired the coils and replaced the camshaft sensor with a “new to me” one but i ran out of money to fix it. It has 140k on the engine and has sat for about 4 months. It is now not turning on anymore and the wires into the battery terminals have started to get corrosion on them.
The mechanic said it may be something to do with a grounding issue? Is it worth it to repair it if so what is some advise as to some of the fixes?
Also some more background information is that it is a standard transmission SE 3.5 l.