Clutch interlock switch function

[jtaborsky]

After my 4.0/m5od swap, my clutch interlock (triple-function) switch works as it should electronically. However, I have broken two of the plastic retaining clips by pushing in the clutch too far, and I think that is going to continue to happen if I keep replacing the clips, so I'm leaning towards bypassing the switch.

Here's my question/concern:

The Chilton manual states the following:

"The clutch interlock switch has 3-functions. It is also known as the Clutch Pedal Position (CPP) switch and provides the 3 following functions:

• It requires the clutch pedal to be depressed to the floor in order to start the engine.
• It cuts off the speed control system when the clutch pedal is depressed.
• It provides a fuel control signal to the EEC system."

I don't need to have a clutch safety, so that's fine. I scrapped my cruise control, so that's fine. HOWEVER, that third item concerns me. Can anyone provide more info on what the clutch does to the fuel control signal? Does pressing in the clutch alter the air/fuel ratio? I would assume a pressed in clutch would make the engine idle down faster. I would like to bypass the switch, but not at the expense of decreasing engine performance, efficiency, or longevity.

Thanks for reading.
- Joe

 

[jtaborsky]

Nobody knows? How could so many people bypass the switch without knowing what it does?

 

[RonD]

Yes the clutch switch sends 5volts to EEC-IV when clutch pedal is up, "in gear"
This doesn't effect air/fuel ratio but can engage REV Limiter if there is no 5volts
REV limiter is usually set at 3,000RPM in "neutral"

Clutch switch can also be part of electric shift 4x4 low, shift module pin 1 gets Grounded when clutch pedal is down

EEC wiring here: http://www.auto-diagnostics.info/ford_eec_iv

 

[Teddlet]

FYI I broke the clips off the cover of my clutch switch and it hasn't fallen off in a tich over a year. The little plunger seems to hold the rod fairly well.

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