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Tps Problem With Safc

Toms32

By Toms32,
in Engines & Forced Induction

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Toms32 Contributor

Toms32

Posted
Posted

I just installed an SAFC II into my R32 the other day. Everything is working correctly except for the throttle %.

My problem is this:

Nothing happens on the screen when I press my foot on the accelerator pedal, however it will randomly show a value on the screen as if it's doing it of it's own accord. In the sensor check option it does the same (sit at around 0.3 or so and randomly jump to 2v or something.) They only change for a split second then goes back to 0% or 0.3.

I've pulled the case of the safc off and tested the grey wire pin that goes to the circut board with a multimeter and the voltage raises when the engine is revved and then go back down again when the accelerator is let off which leads me to believe that the TPS is fine.

The only other option that I can think of personally would be a faulty safc.

I'm going to track down another TPS tomorrow and see if that fixes my issue.

Any help or ideas would be greatly appreciated!

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https://www.sau.com.au/forums/topic/221322-tps-problem-with-safc/
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paulr33 Grand Master

paulr33

Posted
Posted

yeah it sounds like the safc is bogus

it should be 0.30v when nothing is on the throttle and ~3.5v ish i think on WOT with the pedal mashed down

just check you have set the correct opening mode for the TPS (the diaganol arrow) its in ETC somewhere

it lets you choose between a throttle thats 0 to 100% or backwards, ie opposite opening TPS

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