Was my F53 ECU "chipped"?
I bought a new to me 2006 Monaco, it has the Banks powerpac system, from header to exhaust tip, a k&n filter too. It is the Triton V10 30V with 5 speed auto.
When I cruise on the highway at 60mph for instance, if I press the tow/haul button, the tow/haul light on the dash become on, but the little light on the "shift bar" does not. Also I tought that when going in tow mode, the ECU only use 4 speed instead of 5, so I tought it would downshift, but it does not.
Is it a sign that the ECU was reprogrammed? I have an OBDII bluetooth module, can I check some info (mode 09) to know if it was chiped?
'94 Fleetwood Bounder 32H F53 (sold)
'06 Monaco Monarch 30PDD F53 (