Fuel Rail Service Port Location - Chevy Impala Forums
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Fuel Rail Service Port Location

Does anyone know where the fuel rail service port is? I wanted to check fuel pressure at the fuel rail, but the fuel line appears to run under the intake manifold. I didn't see a schrader port anywhere on the fuel line. Any info is appreciated.
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Originally Posted by mdubyk View Post
Does anyone know where the fuel rail service port is? I wanted to check fuel pressure at the fuel rail, but the fuel line appears to run under the intake manifold. I didn't see a schrader port anywhere on the fuel line. Any info is appreciated.
Year, make, model, and engine would be helpful.

8th generation Impalas used several different engines.
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'16 Limited LTZ, 3.6L
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May have to read fuel psi via scan tool?
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There isn't one. Both high and low pressure can be checked via a scan tool.

Be careful. The fuel rail is the high-pressure side of the system. The pressure must be bled off prior to servicing.
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Looks like a scan tool upgrade is next. Any suggestions for an affordable model that will read live data?
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Several nice ones offered at Harbor Freight Tools.
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How affordable? The


with the TORQUE app on your Android phone will read live data. If I get a few minutes tomorrow I'll see if it's picking up both fuel pressures.
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It does. This is from a LFW 3.0l, but should also work on the LFX.

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Good to know. Thanks for your help.
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