Not really, unless you have them hooked up to a pressurized spray can
There are DIY fuel injector tests, that will show you have to do that, and yes a 9v battery can be used
If an injector was not working at all you would more than likely have a steady misfire and computer would set a code for which cylinder it was
If its partially working, some clogging, then testing with a battery and hearing the "click" of it opening won't tell you its clogged
There are DIY fuel injector tests, that will show you have to do that, and yes a 9v battery can be used
If an injector was not working at all you would more than likely have a steady misfire and computer would set a code for which cylinder it was
If its partially working, some clogging, then testing with a battery and hearing the "click" of it opening won't tell you its clogged