Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - To The Moon: Upping economy in a 2000 Dodge Caravan

t vago · 03-06-2014, 02:55 PM

Well, that's mostly true.

A new ECM flash is not required, nor will it change the pinion factor. You just need a DRBIII for that. Unfortunately, my DRBIII emulator does not allow me to change the pinion factor in my minivan's computer. It will helpfully (?) show the pinion factor value once I program in one of the pre-selected tire sizes, though.

Maybe this is different for a 2000 minivan, though. Maybe the DRBIII emulator will allow pinion factor changing on earlier models. It'd be nice to find out.

I might have to set a network sniffer on that, to see what the DRBIII emulator is actually sending to the PCM. If I can do that, then I should be able to set any pinion factor I want.

03-06-2014, 02:55 PM	#51 (permalink)
t vago MPGuino Supporter Join Date: Oct 2010 Location: Hungary Posts: 1,807 iNXS - '10 Opel Zafira 111 Anniversary Suzi - '02 Suzuki Swift GL Thanks: 830 Thanked 708 Times in 456 Posts	Well, that's mostly true. A new ECM flash is not required, nor will it change the pinion factor. You just need a DRBIII for that. Unfortunately, my DRBIII emulator does not allow me to change the pinion factor in my minivan's computer. It will helpfully (?) show the pinion factor value once I program in one of the pre-selected tire sizes, though. Maybe this is different for a 2000 minivan, though. Maybe the DRBIII emulator will allow pinion factor changing on earlier models. It'd be nice to find out. I might have to set a network sniffer on that, to see what the DRBIII emulator is actually sending to the PCM. If I can do that, then I should be able to set any pinion factor I want.