Clutch pedal position

[Maxsevich11]

Hi, everyone.
Could you please help me? I have a 1994 Mazda B3000.
I’ve bypassed the clutch pedal position sensor. There are two wires there, and I shorted them together.
I know it’s not safe, but I’m already used to starting the engine with the clutch pedal depressed.
So, I’ve heard on forums that the ECU somehow adjusts the engine RPM in response to this sensor for shifting gears...
My question is: will shorting the wires have any effect on the engine’s power and performance? The ECU sees the clutch pedal as permanently depressed all the time.
Thanks.

 

[Curious Hound]

I'm not a hundred percent sure. I don't think it affects power. But it may lower the rev limiter setting so you don't over-rev the engine with no load on it.

 

[Maxsevich11]

I'm not a hundred percent sure. I don't think it affects power. But it may lower the rev limiter setting so you don't over-rev the engine with no load on it.

I've checked it many times—the rev limiter kicks in at 5,250 rpm, right where the red zone starts.
Is that supposed to be the case?

 

[mr_manny]

Also curious, as I also disabled the clutch sensor in my B2.
Haven't noticed any adverse effects...but then again, I don't rev my 2.9 above 4k

 

[SenorNoob]

Some members have reported a 3k rev limit in neutral. Seems to be completely random if it's there or not though.

 

[4x4junkie]

There should be three sets of contacts (six wires) on the clutch pedal switch.

1st set of contacts (N.O.) is the Starter Interrupt (this one I know because I have it in my notes, colors are Red/Lt-Blue & Pink)
There is no connection between this circuit and the engine PCM.

2nd (middle) set of contacts (N.C.) looks to be connected into part of the brake lamps circuit (both wires look to be Lt-Grn).
Tracing the wires it appears it is to interrupt the stop lamp signal wire going to the cruise control module (so I guess this cancels cruise when clutch is pushed in)...

3rd contact (N.O.) is the one that seems might have something to do with the engine (Lt-Blue/Yel wire comes from the PCM and connects to Gray/Red)...

I can't seem to find any descriptions in the FSM as to exactly what the signal to the PCM does when clutch is pushed in, so I guess that's all I know.

 

[mr_manny]

I wired the 1st set to a switch.
Allows me to engage the starter motor while in gear and also acts like a simple kill switch.