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Discussion Starter #1
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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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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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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Discussion Starter #6
Looks like a scan tool upgrade is next. Any suggestions for an affordable model that will read live data?
 

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How affordable? The ELM 327 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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