Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
I am sorry your having this problem
when its making this noise at idle and you shut off each fuel injector one at a time do any that you shut off make the noise go away with a scan tool ?
I'm not a mechanic so I don't have scan tool
the odds are and is a very common issue is when there is an injector or two bad or not supplying fuel correctly into the cylinder you will get a fuel knock type noise especially at idle
what has to be done is a shop has to narrow down which cylinder is doing this and the odds are that injector will need to be changed to correct this issue
Just had new injectors put in
ok shut off each cylinder and see which one you shut off makes the noise stop