Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - VSS jumps around when driving faster than 105..110km/h

meelis11 · 05-21-2012, 07:02 AM

Hi,
I have this kind of problem with mpguino, that speed and distance reading are giving false readings when speed is 105km/h or more. Sometimes it jumps to 150km/h, next moment it can show that speed is 0....these are extreme examples, but +-20km/h can happen quite often.

MPGuino is installed on Audi A4, VSS is taken behind instrument cluster. Any idea? Does others have similar problems. My previous car had similar problems sometimes. Normally I dont drive faster than 100km/h but sometimes I get false readings around 90+ km/h. Next moment it shows correct values again. resistors in VSS pin are 50K

05-21-2012, 07:02 AM	#1 (permalink)
meelis11 EcoModding Apprentice Join Date: Feb 2009 Location: Estonia Posts: 199 Green frog - '97 Audi A4 Avant 1.9TDI 81kW Diesel 90 day: 43.1 mpg (US) Thanks: 19 Thanked 40 Times in 28 Posts	VSS jumps around when driving faster than 105..110km/h Hi, I have this kind of problem with mpguino, that speed and distance reading are giving false readings when speed is 105km/h or more. Sometimes it jumps to 150km/h, next moment it can show that speed is 0....these are extreme examples, but +-20km/h can happen quite often. MPGuino is installed on Audi A4, VSS is taken behind instrument cluster. Any idea? Does others have similar problems. My previous car had similar problems sometimes. Normally I dont drive faster than 100km/h but sometimes I get false readings around 90+ km/h. Next moment it shows correct values again. resistors in VSS pin are 50K Last edited by meelis11; 05-21-2012 at 07:55 AM..