Reading Low Fuel Pressure But Car Runs Fine

Discussion in '1996 - 2004 SN95 Mustang -General/Talk-' started by zac101191, Nov 20, 2013.

  1. I have two mechanical fuel gauges one on the regulator itself and one on the fuel rail its showing that when im at idle im at 20psi and 30 when i take off the vacuum line. Its reading 10psi lower than it should but it runs fine. what could cause the gauge to read inaccurate? any help would be great