Audi a4 2010

throwing parts at a car doesn't always do the trick. to properly scan the codes you either need a rosstech cable as a odb only grabs surface issues. have the car scanned with a rosstech software or by a audi/vw specialist shop and then trouble shoot from there. as far as i can tell tho with most of these model of engines is they are not to relativly picky when it comes to strating. get the codes bring them here before replacing anything else. I am sure the plugs and coils helped but there is something else going on. in the mean time check the crank case hoses for blocage and see if the turbo is still functioning right and is not full or oil. easiest way to check that is remove the air box and remove the hose from under the turbo that leads to the throtle body. Also grab a rag and clean off the throtle body plate for good measure. you can use the maf sensor cleaner on this. if you remove it be sure to buy a gasket before doing so