VEMS Community Forum

Technical => Wiring & Sensors => Topic started by: Seight-v8 on October 13, 2019, 05:29:56 pm

Title: strange TPS spike?
Post by: Seight-v8 on October 13, 2019, 05:29:56 pm

hello all,

Looking at some running logs over the last few day, I see a dTPS/dt spike reading of 4.0, when driving at constant speed on the motorway, so im not pressing the pedal, looks like some kind of signal noise from somewhere.

The min setting of my acceleration enrichment is 6, should I be worried about this spike?.

Seen here at the very bottom of the third row of logs.

https://i.vgy.me/YrG2a3.jpg (https://i.vgy.me/YrG2a3.jpg)

Weirdly, does not show anything like this when the engine is not running.

cheers
scott

Title: Re: strange TPS spike?
Post by: MWfire on October 13, 2019, 07:18:12 pm

Noise.
because of that you need to do accel enrichments only after 6.

Title: Re: strange TPS spike?
Post by: Seight-v8 on October 23, 2019, 08:24:07 pm

Still not sure where this is coming from.

Remade the earth connection to the TPS, as it was a little flakey.

Weirdly, its not showing up and the dtps/dt gauge, but it shows up in the vemslogs….

Current I do have the acceleration enrichment start at 6....so its not causing problems as such, but would be nice to solve the problem.
cheers
scott

Title: Re: strange TPS spike?
Post by: gunni on November 16, 2019, 09:04:57 pm

Scope the TPS voltage to attempt to identify if the noise is always at a certain frequency