Nissan 200SX - SR20DET with VEMS - Östersund, Sweden
Contents:
MembersPage/Larsa/VEMSpictures
Tachometer problem:
Orginal tachometer has a dutycycle of 33/255 and dont like signals other than that.
- do you happen to know tolerance ?
- the duty seems not to be constant for all rpm's as seen in the oscilloscope-pictures, but I have defined my duty to be 33/255 of one rev-time and it works good.
- is that common for Nissan 200SX or all Nissan ?
I run the old open source-code (r027) and I made a successful change in it to make it work. but I will upgrade to newest firmware soon..
- Is it possible to add a new constant which define the duty of the tach signal in the newest firmware?
Yes, it is possible.
oscilloscope picture of tach signal [1000rpm 2ms/div]
[1000rpm 10ms/div]
[3000rpm 2ms/div]
