Erratic TPS

[damunk]

I have an errtic TPS readings only while car is driving with megajolt running at the same time on the laptop. it is all over the place and jerky.

And on neutral gear, car still, the tps does not move.

The only time the TPS acts properly is when the car is switched off and then it is nice and smooth on the megajolt software.

[damunk]

So there seems to be not much voltage change for first bit of the turn from 4.8V then it suddenly drops to 2-3V, there after the range is good all the way down to 0V.

But also as I'm turning it down slow around 1.5V mark the voltage jumped back up to 1.6V.

I know megajolt is scaling the whole range but what would you think this volt meter test is showing.

The TPS along with the carbs were brand new and have done probs 5000 miles on them.

[youtube]xA7FRR0tyg8[/youtube]

youtube.com/watch?v=xA7FRR0tyg

https://youtu.be/xA7FRR0tyg8

[brentp]

Try connecting a separate linear response potentiometer instead of the car's TPS and verify it works smoothly and as expected. If this is the case, then the TPS in the car is suspect.

Hope this helps,