4CN Air

iTrader: (7)

I think my stalling may be that my clutch switch is bad. My car will stall when the clutch is pressed in if the car is in gear. If I take the car out of gear I can come to a stop without stalling. The switch in question is the one that is closest to the driver, not the one closest to the firewall. I'm thinking this may be the problem (along with my bad dashpot) because the other day I was adjusting my clutch and forgot to plug the switch back in, I noticed no difference at all.

Although I'm not entirely sure what this piece does, I would think having it unplugged would make a noticable difference if it were working properly.

Does anyone have a p/n and/or price?

spurvo

P/N LA01-66-490A, general class number 18-660B. I got mine from Malloy Mazda the other week for about $30, no more than that. This is likely your issue, I had similar problems...

https://www.rx7club.com/3rd-gen-archives-73/weird-idle-fluctuations-when-1st-gear-305989/

shawnk

I believe the clutch switch you are talking about only affects anything at startup. It is a safety feature so that if the clutch is not depressed (pressing the clutch switch) then the starting circuit is not completed. What is more likely your problem is your master/slave cylinders. If they are going bad you would not be applying as much pressure to your clutch with a fully depressed clutch as normal therefore not fully removing the clutch from the pressure plate. If you stopped your car with the clutch still engaged it would stall.


Am I making sense?

Mahjik

iTrader: (1)

Not necessarily:

https://www.rx7club.com/3rd-generation-specific-1993-2002-16/car-stalling-c-91723/

4CN Air

iTrader: (7)

this may be the problem, I'll have them checked out when i replace my clutch (it's in bad shape right now). But I believe the clutch switch that is closer to the firewall (behind the petal) is in charge of the "clutch safety issues".

If it were the other way around I shouldn't have been able to start my car with the switch unplugged.

shawnk

Wow...alot of good info in those 2 threads...


This is only used with stock ecu or does power fc look at it too?

Mahjik

iTrader: (1)

I believe the PFC will report that there is a problem with the switch (from reading other messages). I don't have a PFC, so hopefully someone with one can comment.

4CN Air

iTrader: (7)

yeah sorry for startign yet another thread on the subject but my problems occur without the A/C on as well, thought my title might bring in readers with the same problem as myself.

Bad_Karma7

I had the same problem, it was my clutch switch. Since I changed it out, it doesn't stall at all, even with the AC on. Stick your head down near the clutch...look at the end of the switch that is in contact with the clutch pedal. Push clutch in with your hands, the clutch switch should have a white piece that comes out about half an inch. If it comes out, but not all the way, replace it! The part cost me $17. Good luck.

4CN Air

iTrader: (7)

https://www.rx7club.com/3rd-generation-specific-1993-2002-16/stalling-decel-fixed-401021/#post4097406

tcb100

Replace the switch. Cheap and takes 5 minutes.

FDNewbie

iTrader: (10)

4CN Air, I saw your other thread, and I also think my clutch switch might be going out...sometimes I have to try depressing the clutch two or three times before the switch catches. Thanks for the info.

I also have the opposite problem you have...my car won't stall while the clutch is down...it'll stall when I take the car out of gear when decelerating (coming up to a light for example). The revs drop, and the engine dies... but I think that's a PFC-related idle issue

Fritz Flynn

iTrader: (263)

It's most likely the clutch switch.

I have 2 new ones. $20 shipped

Thanks,
Fritz

Rated R1

I'm not sure if the Power FC does anything with the input from the clutch switch but if you go to the screen that monitors the relays and such, there is a "circle" for the clutch switch. My car had some intermittent stalling problems and I suspected it was the clutch switch. This began just before I got my PFC. Once I installed the PFC I went to that screen and depressed the clutch. Sure enough the PFC got no input from the switch. I replaced the switch and my problem was solved. Hope this helps.

FDNewbie

iTrader: (10)

Go figure. I learn something new every day I'm going to check it just for kicks...cuz I'm probably going to change the switch anyways.

Quick side question...anyone know if any other EMS gives you the ability to monitor all the 1001 things the PFC does? I think the Microtech has an optional commander type readout...but what about AEM, Haltech, Wolf, etc?

luizajeff

Rated R1, same thing with me, put in the PFC and looked at the sensor page when stepping on the clutch and no signal. Easy replace problem solved.