View Single Post
Old 09-13-2021, 06:11 AM   #419 (permalink)
Master EcoModder
Join Date: Jun 2016
Location: KY
Posts: 1,350

IGL - '04 Saturn Ion
Team Saturn
90 day: 56.19 mpg (US)
Thanks: 63
Thanked 365 Times in 268 Posts
Originally Posted by cRiPpLe_rOoStEr View Post
I knew about knock sensors, but I'm not sure to which extent they could actually measure the actual compression within a cylinder.
It makes the calculations based on the resistance across the coil. Given that itís waste spark there will be an obvious difference in amperage from the coil thatís firing on compression versus the one firing on exhaust, and the ICM looks for that difference to generate the cam signal which allows sequential fuel injection
My current Ecotec project...

My last Ecotec project...
  Reply With Quote