Hi Scotty 

 I have 2012 Chevy Cruze I bought at a used car dealership with out turbo 128,000 miles , I have codes PO201, PO202 , PO203 , PO204 coming up , my brother is helping my try to fix this . He has checked the fuses and the fuse in spot 9 had blown , we replaced the fuse and tried starting the car and that fuse blew right away . This led him to believe that it is an electrical problem . My sister's boyfriend tried helping he said there was an overabundance of oil and cleaned out the manifold , sealed the gasket and replaced the spark plugs . I have a basic idea on car maintenance, he has actually done work on cars . He did not know about the dipping the feul injector in gasoline so that when replacing it there would be a better seal , he is doing the work , is that absolutely necessary, I do it want a leak I. the future and I do not want to buy another ignition coil anytime soon unnecessarily . He will not do it because he feels it is unsafe . He is going to be replacing the ignition coil and the retailer said that itself was the whole system . Should I be concerned or let him try to fix it as he knows how ? And is he correct about the problem being an ignition coil that needs to be replaced , is there anything that may lead you to diagnose the problem differently ? Also I have had the heating/cooling replaced professionally and along with the breaks . Thank you for your time .