Help Identifying this Part?

[bootes]

Had just finished putting the front carpets back in place following replacement of the shift plate bushings a few weeks ago on my '71.  Noticed a small silver cylinder-shaped part unplugged directly above the clutch and brake pedals (see pics). Assumed I had inadvertently unplugged it at some point during the project and I plugged it back in. While test driving the car, I immediately noticed stalling while downshifting as well as at stops. Ordered tune up parts and went away for a week. Got back into town and test drove it again (before minor tune up). Still stalling. On a whim, I unplugged the part and test drove. Car ran great as usual and did not stall and has not stalled since. What is this part and its functionality? It was hard to read but I believe the part number is 113 295 03 40.
Thanks!

[49er]

I checked under my dash and it is definitely pluged in. No idea what it is for

John

[merrill]

does your car have a manual transmission?

clutch slave cylinder?  the tubing looks like it is for brake or hydraulic fluid.

IF it is, the connection may be to prevent starting the car when clutch is engaged?

[Benz Dr.]

I'd say that it's part of the switch gear that runs the stop solenoid. It's not working right and that's why it was unplugged. Leave it that way.

[Shvegel]

I second Dan's idea. I think on the very late cars they must have added a switch  on the clutch to stop fuel flow to the injectors during clutch in deceleration to cut down on Hydrocarbon emissions. This switch would have worked in concert with the switch on the throttle body and the speed relays to shut off fuel while coasting until the engine reached idle speed.

I guess yours is bad and is stopping fuel at will. Might just be on the edge of being adjusted properly or if there is a clutch pedal return spring(Mine is an auto) it might be weak.

Try hooking youe toe on the pedal and pulling up when it is missfiring. That should tell the story.

[49er]

 Here is a photo of mine (build date June 1968). Not too much in the way of emission hardware but I believe you are right. Probably cuts fuel when the clutch is depressed as does the Micro Switch on the accelerator linkage.

John

[Naj ✝︎]

Some info from the 1970 US version model changes booklet.

Don't know why 49er's '68 model would have this switch  

Naj

P.S: John (49er)
Have you ever changed the shifter linkage bushes on your car?
There should be 2 more similar switches on the shift levers to sense 3rd or 4th gear engaged...

http://www.sl113.org/forums/index.php?action=dlattach;topic=14695.0;attach=11327

[49er]

Naj,
 My SL is a very Early '69 model even though it was manufactured in June. Did have the bushings replaced but was done by my mechanic so I am unsure if those switches are there or not. It is a "California car" where historically, emission controls were more stricter then the rest of the US back then.
John

[bootes]

Thanks to all for your responses. that is why this website is so great!

Merrill, your comment is what my mechanic thought when he took a quick glance.

Dan and Schvegel, your comments make a lot of sense.

Naj, help me to follow... Is there something I may have done (related or unrelated to this cylinder w/plug in question or to the additional switches on the transmission you speak of??) when I was replacing the shift plate bushings in the manual transmission?

Rick

[Naj ✝︎]

Hi, Rick,

I have only recently come across this booklet and found out that there are these switches in a US 70/71 manual trans car.
One of the relays near the battery is speed sensing and operates the fuel cut off on the inj. pump during over run.
I do not have any experience or much detailed knowledge about these emission control systems.

Sorry, not much help...

Naj

[ja17]

Yes.

I believe Dan and Pat are correct on the identification. You could double check the diagnosis by removing the wire from the decelration solenoid on the IP then hook the plug ( under the dash back up) and then try it out.