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Fuel regulator blockage - Cars & Trucks

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Too many variables here without in depth Q&A.
Basically I would look at the possibility of blockage by removing the reulator and see if I could back-flush it with gas or low air pressure. I would most certainly replace the fuel filter and flush any line I could.

Good Luck!

Posted on Dec 08, 2014

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MPI Fuel System Pressure Test

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  5. Connect vacuum line to pressure regulator. Note gauge reading. Fuel pressure should be approximately 214 kPa (31 psi).
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  8. If fuel pressure is above specifications, inspect the fuel return line for kinks and blockage.

Capacity Test

  1. Remove the cap from the pressure test port in the fuel rail.
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