PATS Wiring
Posted: Fri Aug 09, 2019 3:28 pm
I've got my engine in and everything is ready to go but I've got a problem. After uploading the tune to the PCM, the first time I turn the key on the fuel pump will run briefly. The engine will kick over like it's going to start but doesn't. After that, when I turn the key on, the fuel pump doesn't run. Now the tune I am using has PATS disabled so I did not put the PATS module in. My truck is a 2003 type-E PATS so it never had a PATS module and there will be no harness to plug it in to. Do you think the absence of the PATS module could be causing the issue? I'm thinking the even though PATS is disabled, all that does is tell the module not to worry about a signal from the key and transceiver and always send an "OK to run" signal to the PCM. Since there is no module the PCM doesn't get any signal. One other thing, if I return the PCM to stock and then upload the tune again, the fuel pump will once again run the first time the key is turned on. Anyone have any thoughts?