The fuel pressure gauge falls into
the everything-else group of gauges - please check the gauges primer for more
info. Normal fuel rail pressures are typically between 30psi to
40psi. This gauge is not something most people need, but it helps for
tuning and troubleshooting problems. Keep in mind that ND top-feed fuel
injectors can run up to 70psi of fuel rail pressures before not seeing any more
Since we're trying to monitor fuel pressures for a fuel injection
applications, the pressures are on the high side. This is one application
where you'll need to go with an electronic gauge for safety. Running a
mechanical fuel pressure gauge inside the vehicle is DANGEROUS due to
fuel being in the line.
Click here for the gauges primer!
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