Quote:
Originally Posted by pannetron
Carl, if we do have an in-line filter after a GM (CTS-V2) pump, should your vaporworx fuel pressure sensor be before or after that filter?
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From a practical standpoint, it won't matter since the external filter will never become enough of a restriction to create a pressure delta.
For stand-alone pumps it's best to have the sensor just downstream of the filter as long as the filter is in the back of the car near the pump.
If the sensor is too close to the engine it will pick up the injector pulses and chase them, creating an unstable idle fuel pressure. In some cases, even with the sensor in the back, a Radium pressure damper is needed. This is most common in throttle body type injection systems where fewer, quite large, injectors are used.