Check your fuses under the hood. There’s a 10 amp fuse for the lift pump. I had the same thing happen to me and it was a fuse
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No. When i was installing the tune i checked to see if there was a fuse for trailer back up lights. I moved a fuse thinking it was from an extra space only to realize it was the 10a fuse for the fuel pump
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Tried to go to stock. Does the same. I don’t believe the lift pump is kicking in. I think the ecm is taking the tune bc when i went to stock it knew nothing was there on ***.
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