Originally Posted by Purcell69
I'll double check the tank vent, but I would expect that vapor lock wouldn't be an issue within 2-5 minutes after cold starting. Also, the vent in the filler cap seems to be working, no sucking sound or rapid expansion of the tank upon opening.
This could be something as simple as a loose wire under the dashboard, as I had ziptied the rat's nest of wire that I haven't thinned down yet up and out of the way before the car show back on the 18th.
When I bought the fuel pump module for this one, I didn't cheap out and just get one that would fit. As I recall, it is either Airtex or Carter guts, but I could be wrong. I know it wasn't a "budget priced" part. It could also be something tripping the ASD (Auto Shut-Down) mode. As I recall on Chrysler, if the ASD trips, it kills the fuel pump, not ignition.
Right now, I don't have the Check Engine Light wired up because I don't have the computer controlled transmission installed yet. Scanning for codes is possible, but it would be a matter of sorting through the systems that have been deleted vs. the systems present and then figuring out which of them would affect the fuel system.
What I will likely do, at least for now, is check for power to the pump module. If there is power to the pump module, run it again until it stops. Then, check for power again. If it still has power, the pump module is bad, which is an easy-ish fix involving removing the bed for access.
If there is no power, either the ASD is active or my under dash wiring has become problematic. Either way, I need to clean up the under dash mess. While I am working on that, I can run an on/off switch for the pump module and a dedicated circuit that will bypass the PCM (which could also be the problem). The on/off could also serve as anti-theft, so I may just go that route anyway.
At this point, my money is on the wiring, since it's the Dodge wire harness, not something that was purpose built for this truck.
-Joe
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