Im in the process of checking my fuel pressure because I am pulling up codes 87, and 96 and am running lean. I rented a fuel pressure checker from Autozone and it didnt come with any instructions. I hooked the gauge up to the shradder valve, unplugged the vacuum line from the FPR. My question is, theres a clear plastic line coming off of the autozone gauge and when I press the button its connected to it squirts out gas, should I leave this alone? Also the gauge is reading pretty high and I was wondering if it had anything to do with the fact that im low on gas? And should I cap off the stem were the vacuum plugs into the FPR?
Thanks
Thanks