Hard cold start on E85
06-20-2011, 07:59 PM
#11
I would start in the 0 and 1 stages, from -40° to 158°, and multiply them by 1.25. Then blend into the higher stages. If that doesn't help, then multiply the same temperature ranges in the 2-12 stages and blend upward again. It's all a guess. You won't hurt anything, but save your changes with a different name than your present tune so you can put it back if you don't like it.
06-20-2011, 09:08 PM
#12
I would start in the 0 and 1 stages, from -40° to 158°, and multiply them by 1.25. Then blend into the higher stages. If that doesn't help, then multiply the same temperature ranges in the 2-12 stages and blend upward again. It's all a guess. You won't hurt anything, but save your changes with a different name than your present tune so you can put it back if you don't like it.
06-21-2011, 03:55 PM
#17
GM has used Virtual Flex Fuel Sensors since 2006 on must E85 applications.
I perfer using OE E85 calibration on all applications for tuning. If you use a VFF calibration you need to take a lot of time with this tune. You can run into an issue with the tune being off and the PCM uses the VFF software to correct the stoich for E%, but it is the tune that is off not the E%.
On your 08 all you need is a E85 calibration setup for your VCM ID and VIN. Then you will have a calibration that works like the OE truck. You can tune the normal HPT tables after that.
email me your VIN and I will look around
caleditor@pcmcalibrators.com
I perfer using OE E85 calibration on all applications for tuning. If you use a VFF calibration you need to take a lot of time with this tune. You can run into an issue with the tune being off and the PCM uses the VFF software to correct the stoich for E%, but it is the tune that is off not the E%.
On your 08 all you need is a E85 calibration setup for your VCM ID and VIN. Then you will have a calibration that works like the OE truck. You can tune the normal HPT tables after that.
email me your VIN and I will look around
caleditor@pcmcalibrators.com
06-21-2011, 05:27 PM
#18
GM has used Virtual Flex Fuel Sensors since 2006 on must E85 applications.
I perfer using OE E85 calibration on all applications for tuning. If you use a VFF calibration you need to take a lot of time with this tune. You can run into an issue with the tune being off and the PCM uses the VFF software to correct the stoich for E%, but it is the tune that is off not the E%.
On your 08 all you need is a E85 calibration setup for your VCM ID and VIN. Then you will have a calibration that works like the OE truck. You can tune the normal HPT tables after that.
email me your VIN and I will look around
caleditor@pcmcalibrators.com
I perfer using OE E85 calibration on all applications for tuning. If you use a VFF calibration you need to take a lot of time with this tune. You can run into an issue with the tune being off and the PCM uses the VFF software to correct the stoich for E%, but it is the tune that is off not the E%.
On your 08 all you need is a E85 calibration setup for your VCM ID and VIN. Then you will have a calibration that works like the OE truck. You can tune the normal HPT tables after that.
email me your VIN and I will look around
caleditor@pcmcalibrators.com