Fierofly

iTrader: (1)

I'm installing a LS3 in a 996 Porsche. I've looked at both the Porsche and the GM wiring schematic and both pedals have the same amount of wires going to them with two sensors in each pedal. the wires to each sensor are 1ea ground, 1ea 5v, 1ea signal going to the PCM.
I'm thinking that since they both have 5v going to them then the return signal wire shouldn't fry the PCM. Maybe won't work right but it shouldn't do any harm??? This would save me so much extra work not having to take apart the dash and mounting the GM pedal and having to extend the GM pedal wiring.

Anybody tried using a different manufactures pedal? Both cars are obd2 also.

Thanks, Michael

EFIHARNESS

you could make it 4 wires
5v+ you would parallel this at the pedal
5v- you would parallel this at the pedal
pp#1 this sweep goes up
pp#2 this sweep goes down
you won't hurt anything if hooked up wrong. but won't work
The sweeps must be in the right correlation to work properly

autocomman

Grab an ohm meter and see what the values are in both of em

Fierofly

iTrader: (1)

So I got out my Ohm Meter and this is what I got. I think these pedals are interchangeable, What do Ya'll think?

Porsche Pedal (6 wires total, 3 to each sensor)

Sensor 1
Grd to Sig, 1.27 , 1.9
Grd to 5v, 1.2 , N/C
Sig to 5v, 2.15 , 1.5

Sensor 2
Grd to Sig, 1.16 , 1.56
Grd to 5v, 1.69 , N/C
Sig to 5v, 2.59, 2.15

GM Pedal (6 wires total, 3 to each sensor)

Sensor 1
Grd to Sig, 1.3, 2.1
Grd to 5v, 1.1, N/C
Sig to 5v, 2.0, 1.3

Sensor 2
Grd to Sig, 1.3, 2.2
Grd to 5v, 1.6, N/C
Sig to 5v, 2.6, 2.4

First number is Idle, Second is Full throttle

Grd= Ground
Sig= Signal Wire
5v= 5 volt supply
N/C= No Change

gofastwclass

iTrader: (2)

From my understanding of the fail safes built into the GM PCM (and I am by no means a GM engineer) it will either work or it won't. If you get to a point where the numbers don't correlate to what the PCM expects, the PCM will throw a code and kill the drive by wire throttle control. Having said that, this means your system MIGHT work in your driveway and might even work going down the road for a while, but at some point you COULD hit a point in the crossing arcs that don't align with the rate the PCM expects. This is the point the system will go dead and set the code.

I'm not saying it won't work, I'm just saying if you get it working in the garage on stands or in the driveway, don't break out the champagne just yet. I had an 2007 Silverado engine we made some changes to and it took about fifteen miles or more for it to decide it didn't like something between the calibration and pedal.

Of course going dead pedal is better than the Toyota alternative!