Scotbennett2

My 94 thor rv (454 engine engine - 14k miles) starts but dies ss soon as it warms up. Then itll start and die immediately until i exhaust the battery. Once it cools iff it will start again. This began while stopped at a light and it just up and died. 15 min later it started and ran fine until it haperned again, and again then it would die whenever i gave it gas and now i basically cant move it.
have replaced:
Fuel pump
Fuel filter
Ignition coil
Oil pressure switch
Distributor rotor
Verified spark and fuel getting to engine
Bypassed fuel pump relay
Cleaned throttle body and air intake
Checked fuses
Checked for vaccum leaks - none that i can find
Checked wiring for shorts
There is no MAF in this model
Pcv rattles like it should
Played with timing
Throttle body was rebuilt 2 years ago
tightened alternator belt
Not throwing any codes on obd1
oil pressure is at 80psi which seems higher higher than normal

Runs normal until it warms up then it sputters and dies. WTF?

kevinkpk

When did it start this, and what has changed? I don't believe it is ignition.

Scotbennett2

Started acouple months ago hadnt done anything to itwhenthis started it was running fine then this

Acted like a fuel filter or pump problem so i switched them both. I runout of gas constantly. Clogged fuel line? But we pulled the intake to the thrittle body and gas was flowing great
Ihave noticed tho that ifi drain the fuel at the point it enters the throttle body the flow seems to slow down as i go longer. (Have been siphoning gas to run my external generator) i figured i was just getting to the last of the gas in the tank

kevinkpk

Did this problem start with siphoning gas or was there before. What you describe is a vapor lock, but shouldn't be with your set up. Are you running the engine, and external generator at the same time?

Scotbennett2

Never siphoned gas before. External generator is not part of the system. It is literally external as in a portable harbor freight predator 2000. My onboard generator is an Onan 5000 but no i was not running it at the same time as the engine.

It consistently dies as soon as it warms up now. Not sure what all changes at the moment it is warm besides the thermostat opening, the choke going off but something at that moment is killing the engine