CB99SS

How do you check the settings on a NX Fuel Pressure Safety Switch? I'm running a Walbro 255 intank pump and 30 lb SVO injectors. My nitrous works fine for the first run. Then on the second run the nitrous shuts off at the higher rpms of each gear.

So I'm thinking my NX Fuel Pressure Safety Switch is bad or needs adjustment.

Thanks for the help.

Sears

You can adjust it by removing the rubber boot and turning the dial to change the pressure its set at. You will need some sort of fuel pressure gauge to check this.

Justin

CB99SS

What pressure should it be set at?

Thanks

rob-ss

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by CB99SS:
<strong> What pressure should it be set at?

Thanks </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Like Jsears said you will need a pressure gauge. First check pressure at idle and make sure it is within spec. Then do a wide open throttle pressure check and note any pressure drop and assure it is within acceptable range. Assuming the WOT pressure is good you will usually set the pressure switch to open the circuit at about 5 psi lower than your lowest reading give or take a few psi.