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Ron
Ron, ASE Certified Technician
Category: Ford
Satisfied Customers: 33415
Experience:  23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs
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Ford E-350 Econoline: Tioga RV ford 1991 460cc ecnoline 350

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Tioga RV ford 1991 460cc ecnoline 350 engine troubles; stalls when hot driving along fine at 75MPH, then just like turning off the key loses power down to 0, then stalls. Wait 5-10 minutes, maybe more if really hot, and will fire back up and go for a while, then do the same thing over again. Does not have any issues like this when it is colder out like in January - drove 800 miles w/o stalling. Have already replaced ignition module. Fuel pump? Something is getting hot and shutting down.
Hello and Welcome to Justanswer, My name is XXXXX XXXXX I am here to try and assist your with your question.

Unfortunately the problem you are describing is a very common on the 1991 460 and its is in most cases caused by a failing fuel pump (in tank) and this usually always happens in warm weather. When the pump begins to fail, it will over heat and this causes the fuel to foam and the engine will stall. Often times, once its had a chance to cool down it will start and run again. The place to start to be sure, is to install a fuel pressure gauge to the fuel rail service port and monitor fuel pressure while the problem is occurring. You need to see 32 to 45 PSI, anything less means you need a new pump.


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