Nice find.Had a truck kick my butt for a couple of days. Came in acting like it was gelled, it wasn't that cold, but have funner things happen with bad diesel, this time of year. New fuel filter, didn't want to hold prime, so replaced the filter head, same thing. Put a test tune in it since the DPF was causing a see dealer messsage and codes, still would only run for about a minute and lose rail psi. Ended up hooking up a electric pump out of a fuel can to the filter head to make sure it wasn't engine related and the truck ran great then. So I pull the bed off and open up the tank to find this top from a fuel treatment can in the pickup bucket. I guess it would fall off for long enough to prime the system and run engine for a minute before blocking the inlet. Needless to say, I finally ordered a adapter setup to beable to read vaccum from the test port on these trucks.View attachment 105467
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