I have a 2004 fleetwood southwind. It has a 8.2 Chevy vortex engine. I went to start it the other day and the battery was dead. I used the house batteries to help start the m/h. It started but also had a low engine power message on the dash. when I pressed on the accelerator there was no reaction. I let the engine run for awhile and the engine finally responded to the accelerator. There is a engine light that stays on now. Any ideas what this might be?
i had the same thing happen and after the alternator brought the battery back up to full charge, the throttle responded and the message went away. You know that your throttle is "Throttle by wire" which means it needs voltage to respond. There is no cable or other connection from the throttle pedal to the fuel injectors, just an electronic connection that needs a full charged battery to perform properly. So the solution is don't let the battery go dead.
The check engine light is what is probably still on in your MH and it probably has OBD II code "P1516= Throttle Actuator Control Module- throttle actuator position performance" stored in it's memory.
You need a OBDII scanner to check that code and then reset the OBD code and the light will go off.
2004 Southwind 32VS 8.1 Workhorse chassis
2002 CRV Toad
U. S. Gear Unified brake system
Retired Fire Captain, SFD
As soon as a fault stops the dash light usually goes off. The code is still stored in the ECM. There may be a coincidental fault you need to check out. Of course charging your dead battery with your alternator could affect the alternator. If your battery took a charge you could remove a cable from one terminal and to let the ECM reset. That might remove the dash light. But as other have written, there is no substitute for a code reader.