Tech guru James Berry looks into how to diagnose a failed or clogged fuel injector on a Corvette with port fuel injection.

For testing, the injectors are wired up to an electric injector tester, which is one of the few off-the-shelf components in the build. The fuel pump and injectors are powered by the 12 volt rail ...

If this simple test doesn't change the symptom, the problem could be a faulty throttle-position sensor, restriction in the air filter or induction system, or a clogged injector.

If the injector is clogged with a bit of carbon, all the solvent in the world won't get it out. <BR><BR>Honestly, your best bet is probably the junkyard.

Diesel injectors are rated two ways: in horsepower-over-stock and percentage of flow over stock. To allow a little wiggle room for future improvements, we opted for Dynomite’s 100hp injector set ...

When you get into five-figure RPM territory, fuel injectors aren't so much firing individually as much as they're spraying fuel constantly.

Take a look at part 2 of rough running. Diagnosing a failed or clogged fuel injector can be tricky but here are some tips to help.