GM TPS to Ford throttle body

[Shannen Durphey]

Early GM TPS have slotted mounting screws so the signal voltage at idle can be
adjusted. 
Later sensors are non adjustable.  ECM's used with those sensors use the lowest tps
reading as zero throttle opening.  

You should use a meter to determine where max voltage output is obtained.  You may
not really have a problem.  Most TPS "close" more than the throttle shaft they are
actuated by.  

Low end of signal voltage is usually less than 1v for GM auto zero
units, with .5 +/-.25v being a nice number for the adjustable part.  

Shannen

Glenn D wrote:
> 
> I have a GM (VN commodore) TPS, which i'm trying to adapt to a ford XF
> throttle body. It seems that the ford's butterfly does not pivot as much as
> the GM's, (is this possible?!)
> 
> When using the GM TPS the ford throttle body isn't able to turn the TPS
> through it's whole 'range'. I'm judging the start of the TPS range from
> where i can feel the spring start to stretch. After opening the throttle
> butterfly fully, their is still another 20-30 degree's left of rotation in
> the TPS before it reaches the 'end'.
> 
> is this 30deg used? or is the TPS return 5volts all along this 'extra'
> 30deg.
> 
> My main concern is that the ECU won't register WOT when the throttle
> butterfly is fully open.
> 
> can this be adjusted in the ECU? (like a WOT throttle voltage)
> 
> Thanks.
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