Engine stalls when depressing clutch

[Onnfire]

I have a 3.0 liter in my 1977 911S which starts great but after 10 minutes of driving the engine light will flash and the engine will stall, when I depress the clutch. Has anyone got any ideas what could be causing this.

[pete3799]

What engine light....alternator or oil pressure.

[Onnfire]

The red light is on the pressure/temp guage and the light has a little G under it

[pete3799]

What RMP does it idle at?
Should be at 950

[Onnfire]

Hi Pete
Engine idles at about 1000

[steely]

No idea. Can you give a bit more info, like was it running fine this season and just started doing this? Did you recently have some work done? When was the last tune up - why is the idle set high? Does this happen every time (100% repeatable for the exact same conditions)?

This comes off as quite unusual, so you may get a better response if you give more details or background. My guess is that there is a tuning issue and the stalling may be coincidental with the clutch disengagement. Any other clues you could offer would be helpful.

[rgmrgm]

i would check the wiring near the clutch pedal and under the car near the clutch linkage

[Onnfire]

Originally Posted by steely

No idea. Can you give a bit more info, like was it running fine this season and just started doing this? Did you recently have some work done? When was the last tune up - why is the idle set high? Does this happen every time (100% repeatable for the exact same conditions)?

This comes off as quite unusual, so you may get a better response if you give more details or background. My guess is that there is a tuning issue and the stalling may be coincidental with the clutch disengagement. Any other clues you could offer would be helpful.

The car actually sat in a paint and body shop for about 3 years. It ran awesome before it went in. My problem of stalling started since driving it this year.I have changed old fuel etc. It starts great but after 10 minutes and especially when it is warm out it always stalls when coming to a stop sign. Usually I pop the clutch and hold my foot on the gas to keep the idle up so it doesn't quit. If it does quit on me I have to hold my foot to the floor to get it started.

[steely]

That is a 77?! Beautiful car!!

The only advice I can offer is to possibly search here for stalling or idle issues that other 3.0 folks have. Sorry for the lame response, but I think that is what you are looking at if you have to blip or rev it to keep her going. Mine is a 3.2 and after 3 yrs I am still learning - and our fuel systems are different.

One guess could be a vacuum leak, or fuel issues (like crud in the filter, tank or lines, especially after 3 yrs).
If it's really a turbo, then I definitely am not your guy.

hth

[Mr9146]

Sounds like it could be a bit rich.

[Onnfire]

Originally Posted by steely

That is a 77?! Beautiful car!!

The only advice I can offer is to possibly search here for stalling or idle issues that other 3.0 folks have. Sorry for the lame response, but I think that is what you are looking at if you have to blip or rev it to keep her going. Mine is a 3.2 and after 3 yrs I am still learning - and our fuel systems are different.

One guess could be a vacuum leak, or fuel issues (like crud in the filter, tank or lines, especially after 3 yrs).
If it's really a turbo, then I definitely am not your guy.

hth

Thankyou for the compliments: Yes it was a 1977 911S

but changed to a 1996 993 Super Turbo Wide Body (BUT NOT A TURBO) just a 3.0 liter 4 speed. I will check around for stalling and idle issues. Thanks for trying

[kabeldavid]

Try your grounds I had a old GM car that would stall when I put the clutch in and it was a broken ground strap.