Not even close.... not trying to pee on you, but it won't tell you what you need to know. That is the issue with the fuel pressure gauge. Best thing you can do with it is to CAREFULLY run a hose out of the engine bay and tape the gauge on the windshield and run down a side road for 1/4 mile or more. But of course you might burn your car down if things go bad with that setup! You really need a remote fuel pressure sensor. Sorry.
