V6Discussion and questions about the base carbureted or MPFI V6's and the rare SFI Turbo V6.
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How do you find out which injector is leaking on a V6 motor? We don't really have a fuel rail that we can pull out to check. Or do we? Doing an ohm test won't tell me, checkinf fuel pressure won't tell me. What else?
You check them pretty much the same way we check them on the V8's. Lift the fuel rail off the manifold and have someone prime the pump while you check the injectors for leakage. Here is a breakdown of the V6 fuel rail for you.
The two bolts that hold the rail to the lower plenum need to be removed so the rail can be lifted. Might I suggest some small containers or something to catch the gas so it doesn't get all over the rest of the engine?
You'll need to remove the upper plenum also. And if i remember correctly isnt the cold start injector in the rear of the manifold? He'll have to remove that as well or the fuel rail wont be liftable?
Have you read the plugs yet? Maybe one is extremely fouled out (or super-clean)... look for one that doesn't match the others.
You could also prime the pump a few times (on a cold motor), and then pull each spark plug to see if any look wet. Might or might not work, but checking the plugs is the easiest thing to try.
__________________ -Tom P (Hot rodded 1986 Firebird 2.8l)
