Fuel Injector leaking at O ring
Thread Starter
Burning Brakes
Joined: Jan 2017
Posts: 961
Likes: 237
From: Diamondhead Mississippi
St. Jude Donor '17-'18-'19-'20-'21-'22
Fuel Injector leaking at O ring
I just installed a set of Bosch III injectors from FIC. Followed their directions. I tried to pressurize the fuel rail before reinstalling runners and plenum but it would only go up to about 12 pounds. I only reconnected the battery for the test. all other wiring was still loose (taped up alternator lead to keep from shorting). First any idea why pressure would not go higher and second what could be causing leak at #2. I will take the rail loose tomorrow and check the O ring to make sure it looks OK.
I did lightly oil them as per the directions and seated them in the manifold first. I did not use the clips in the rail as instructions from FIC say not to use them.
I did lightly oil them as per the directions and seated them in the manifold first. I did not use the clips in the rail as instructions from FIC say not to use them.
Melting Slicks
Joined: Jan 2014
Posts: 2,192
Likes: 381
From: Lunenburg MA
Sometimes the two o-ring trick doesn't seal on the first try. I bet it will if you just reinstall it. In my experience, once they seal they stay that way. The 12lbs could be because of the leak.
Thread Starter
Burning Brakes
Joined: Jan 2017
Posts: 961
Likes: 237
From: Diamondhead Mississippi
St. Jude Donor '17-'18-'19-'20-'21-'22
It isn't leaking at the intake where the double O rings are, it is leaking at the top where it goes into the fuel rail. It was just a small leak it just did not seem like the pump cycled long enough. Not sure if this is because most of the wiring on the top of the engine is disconnected and moved out of the way. Is it possible this would affect the signal from the ECM to the pump to run. I did notice when I tried cycling the pump again with KOEO that my dash was acting weird.
