Fuel sensor trubbel

[Motorcraft]

Hi, I have a DTA S60 in my Sierra Cosworth that I mounted in year 2005.
Yesterday I fitted a fuel pressure sensor from Reveltronics and I use 5v and gnd directly from ECU .
(Iam not using any pull up resistor).
I have entered the sensor value in map.
When idle the pressure showing 3bar but every 3rd second the pressure quick dipping to 0bar.
When enter filter value to max (20) the pressure quick dips to 2bar,
When normal driving it's more stabile and do not have these big dips.
But when I do a WOT pull the pressure rise to almost 5bar then jumping around Abit then goes down and stay at 0bar from about 5000rpm.

Would it be better if I use a pull up resistor or what's that for?

/Jörgen. (Sweden)

[stevieturbo]

Link to your sensor ?

And have you used the sensor ground ? not power ground ?

Upload a datalog of this behaviour.

Pressure should rise/fall relative to intake manifold pressure.

And NO. No pullup resistor or messy wiring is needed

[Motorcraft]

Link to your sensor ?

And have you used the sensor ground ? not power ground ?

Upload a datalog of this behaviour.

Pressure should rise/fall relative to intake manifold pressure.

And NO. No pullup resistor or messy wiring is needed

Yes its the sensor ground I using.
The fuel pressure is rising/falling with the intake pressure so that's fine, that's not the problem here.
First log is filter value 20 and second log is filter value 5
Haven't got any log when driving and pressure falling to zero, maybe I take a ride tonight to log

https://www.reveltronics.com/en/shop/60 ... -5v-detail

[stevieturbo]

Always datalog. Always.

If signal is dropping out then it is likely a wiring or sensor issue