454 Chevy
After driving 60 miles rv starts to lag..can't get over 30mph...hard to restart..after cools off she runs like a champ...had alternator checked, good..anybody ???
Forum Discussion
I fought with this SAME problem for years. Turned out that the coach had 'Settled' down lower onto the chassis causing the fuel lines atop the gas tank to get chaffed on top. This allowed air to be sucked into gas line only when I was under gas pedal load as when climbing a long gradual grade. It could also be the in-tank fuel pump.
