View Single Post
Old 06-09-2013, 10:41 PM   #5 (permalink)
t vago
MPGuino Supporter
 
t vago's Avatar
 
Join Date: Oct 2010
Location: Hungary
Posts: 1,807

iNXS - '10 Opel Zafira 111 Anniversary

Suzi - '02 Suzuki Swift GL
Thanks: 828
Thanked 706 Times in 455 Posts
Yah, I will likely next go with the variable resistor route. I just have to find a small variable resistor (<= 1k ohm or so).

And if that doesn't work, I got a similar EGR valve sitting right beside me. The EGR valve in the car is driven by a pulse-width modulated 128 Hz signal. I'll hook the spare EGR valve up to the engine computer, piggyback the solenoid driver signal into a small microcontroller (likely a Microcore-11, since I have a few of them here that are gathering dust), and use that to drive the actual EGR valve. The microcontroller would then read the variable resistor, and multiply the EGR PWM signal by some percentage determined by the variable resistor.
  Reply With Quote