Greetings from a newbe group member and tuner.
I upload a new tune into my 5.7 and less than a minute later the fuel pump starts howling and I notice the fuel PSI dropping down to 20 psi and then surging back up to 55. Over and over about two seconds apart per surge. It sounds like a normal issue with a fuel pump taking a dump however the timing of the thing has me wondering. The -0009 file is the upload where it happened. The other file 88YJ5-7 is the original tune pulled from the computer. Anyone see anything obvious? I went back to the original tune and the same issue occurs.
Looks like tomorrow I'll be dropping the tank.
John