I have an 1991 ford fairmount falcon, recently i guy said have u checked air filter. we took it out bang ed it on the ground heaps of old dust and flies came out .put it back in.bout a day later it stars lose in power ,still goes but its less responsive now takes more time to pick up pwer. mechican said it wont be the carb , looks like it has one but its centre point injection. any advice would be great
