TPS failures - better designs?

[Bob Valentine]

I'm sure there is a more reliable sensor (eg non-mechanical), but the the
OEM's figure that if a $.50 oem-cost part can last at least 50k then the
cost of a better design is wasted.... a replacement TPS is usually <$20 so
it's not that bad.

My experience with the E4ME carbs was that if you got 10k out of a TPS you
were doing great.    I've had what I think are more just plain bad
production TPS units on GM EFI motors.   Some brand-new Delco TPS's last
only 5k, and some I've yanked from 100k+ junkyard motors are fine.

-> Bob Valentine
-> bob at tecmark.com

At 01:19 PM 12/02/99 +1100, you wrote:
>Dear EFI gurus,
>
>I was at the wreckers (bone yard?) yesterday. Seems
>that the Throttle Position Sensor is a common point
>of failure. Being a novice when it comes to GM EFI 
>hardware, I figured that a better design than a simple
>pot (potentiometer, or "variable resistor") was in 
>order. Having recently played with a Hall Effect sensor,
>for ignition pickup, I also figured that a simple TPS,
>both reliable and robust, could be done cheaply and 
>easily with just such a Hall Effect device.
>
>As we all know, "there's nothing new under the sun"...
>So, here's the EFI content:
>
>  Are there any Hall effect TPS sensors around?
>
>Or, perhaps a better question is:
>
>  Are there more reliable TP sensors than simple pots?
>
>TIA,
>-- 
>Peter Gargano
>
>