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edorfox Offline OP
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Hi,
I have searched and found a couple paragraphs regarding the CPS. It is wired thru the PCM and affects the fuel metering somehow...without setting off some domino effect...how would one go about disabling it? What would happen if you simply pinned the switch down permanently?

...Ed


2000 Silver Frost SVT
#1625 14 Jan 2000
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1998 T-Red CSVT
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edorfox Offline OP
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Hi,

Disabling the switch is much easier than the link posted...my question was mainly...what effect will disabling it, by whatever means, have on fuel metering while driving down the road?
Here is the text from the manual describing its operation...

Clutch Pedal Position Switch

The clutch pedal position (CPP) switch (Figure 23) is an input to the PCM indicating the clutch pedal position and, in some manual transmission applications, both the clutch pedal engagement position and the gear shift position. The PCM provides a 5-volt reference (VREF) signal to the CPP switch and/or a park/neutral position (PNP) switch (on the CPP signal line). If the CPP switch (either or both CPP and PNP switches are closed) is closed, indicating the clutch pedal is engaged and the shift lever is in the NEUTRAL position, the output voltage (5 volts) from the PCM is grounded through the signal return line to the PCM, and there is 1 volt or less. One volt or less indicates there is a reduced load on the engine. If the CPP switch (or PNP switch on vehicle or both CPP and PNP switches open on the vehicle) is open, meaning the clutch pedal is disengaged (all systems) and the shift lever is not in NEUTRAL position (PNP switch systems), the input on the CPP signal to the PCM will be approximately 5 volts. Then, the 5-volt signal input at the PCM will indicate a load on the engine. The PCM uses the load information in mass air flow and fuel calculations.

The last sentence is why I am concerned.

...Ed

edit...oops, I just noticed this is probably posted in the wrong forum heading...general mods might be better. :p


2000 Silver Frost SVT
#1625 14 Jan 2000
Dual Mode Dampener
A/C switched
K&N Dropin
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Okay, I'll bite...why would you want to do this?

BTW, there are quite a few spots in the PCM that hook into the CPP state. I don't recall the specifics at the moment.


1999 Contour SE Sport MTX75 T-Red/Grey
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edorfox Offline OP
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Hi,

Stupid I guess...I don't like having to push in the clutch to start it. More trivially...it puts a slight load on the crank thrust bearing at a time when it might not have proper oiling. :rolleyes:

...Ed


2000 Silver Frost SVT
#1625 14 Jan 2000
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There are TWO switches,one sends a message to the PCM re clutch position to adjust fuel etc re trans drag,the other is the starter inhibitor switch.I'm thinking its the starter switch you want to disable not the position switch re PCM....... wink


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