My Southwind with 454 has aproblem if I accelerate heavy for any length of time. I usually only have a proble if I try to maintain some speed up a hill, I live in Florida so I don't think hill is the right word. The engine acts like it is starving for fuel and the vacumm gause botoms out to zero, I can let off the gas for maybe 2 seconds and it goes back to running normal.
The engine how has about 73K, had about 61K when we bought it about 2 years ago. I believe there could many possible culprits.
1. High speed jets partially gummed up. The folks I bought it from did not drive it far or fast.
2. Fuel filter. At some point the fuel line was cut to remove the screw in in-line filter and a clamp on was installed. I have not changed the filter yet.
3. Float level to low making the engine starve.
4. Fuel pump can't keep up. RV runs out fine other than under heavy acceleration and has been this way since we purchased it.
I hate just changing parts and not knowing for sure if that part is the problem.
. Does anyone of any ideas