JohnTso
Veteran Member
Background - I'm not new to TDI's. I've done all maintenance, repairs and mods since 1998 - except for TB. Now that I own a VCDS I'm looking to fine tune my TDI's.
Does it make any sense to adjust the IQ value using the VCDS to find the sweet spot (performance & FE); then do the hammer mod to mechanically set the value?
The Desert Jetta (stock engine) is running well, but the IQ is 2.5 and timing is very slightly advanced. My thinking is both could be tweak somewhat.
Does it make any sense to adjust the IQ value using the VCDS to find the sweet spot (performance & FE); then do the hammer mod to mechanically set the value?
The Desert Jetta (stock engine) is running well, but the IQ is 2.5 and timing is very slightly advanced. My thinking is both could be tweak somewhat.