W.A.R./MAF and 3 pin variable tps, no can ?

[fporro]

Aloha guys,

Searched around but only come up with 6 pin tps to MSII or other compatabiliry answers, so...

scanvaged 3 pin variable tps's from various bmw's and wondering if they'll just plug into oem location without wire swaping ? they're for my m20 with itbs and miller w.a.r./maf combo.

mounting it is not a problem, just need to double check wiering, thanks.

volt readings varied between them.
switch 1: .062 to .456 V
switch 2: .105 to .504 V
switch 3: .120 to .632 V

my m20 harness plug:
pin 1, br/bl, signal
pin 2, brown, ground
pin 3, brown/black, 12+V

all 3 variable tps work as follow:
pin 1, at close position, .062 raises to .456, .105 to .504 and .120 to .632V's at wot.
pin 2, ground ?
pin 3, at closed position .456 droping to .062, .504 to .105 and .632 to .120 as turned.

So, I'll use switch # 1 with lowest Voltage readings, it seems like it should work unless motronic 1.3 only reads on/off oem type switch. any ideas ?

Mahalos,
Frank

p.s. just cut up carbon airbox for it to clear brake booster, now I'll have to get her patched up, also modified throttle cable bracket for it.

[jlevie]

That won't work. The DME only senses open or closed for the idle and WOT switches in the TPS.

[LowR3V'in]

You can use an m30 tps that has stock wot switch and also tps.
6 wires.

[fporro]

jlevie, thanks.

LowR3V'in, which wire to which ?

so far tested resistance at 20K, results ...

[fporro]

yeap, it won't work, tried swapping connectors 1 and 2 as well as 2 and 3, it's a no go.
thanks guys.