Loss of power on left turn ('76 2.7 CIS)

[Ads912]

I have a 1976 911S 2.7L with CIS.
When turning at medium to fast speed on a sharp left, the engine completely cuts out...no power. When the car straightens out again, the power comes back.
Anybody ever have this problem?

Thanks,

[IROC]

I had this exact problem once on my '76, coincidentally. I checked everything known to man and finally found that the previous owner had butchered the connector that goes to the fuel pump when he replaced it and one of the wires in that connector was shorting out against the fuel pump housing (causing the fuel pump to quit momentarily) during left turns only.

Mine would cut out very slightly during slow left turns (or even lane changes) and would cut out violently when making sharp left turns. It also did it more during warmer weather. It was usually fine during the winter months.

Hope this helps.

Mike

[Paulporsche]

Is this dependant on fuel load at all?

[Rex Walter]

Ads912,

I don't believe it - I suffered with this problem for years and thought it was just mine. It only happens during left turns. Sometimes even a left turning freeway will do it. Straightening out cures it immediately. Mechanics would look at me like I was crazy. I still don't know what was causing it, but during my engine rebuilt I found that all the wiring insulation was destroyed between the alternator and the engine cover - all the alternator wiring that is hidden under the engine cover, and subjected to heat. I don't know yet if this was the problem, but since my engine and wiring harness rebuild, the car has not done it once. I went so far as to hook lights on the dashboard up to the fuel pump power, so I could see if power was being interrupted - but it acted like electrical not fuel, as it would come and go suddenly - not like running out of fuel.

Rex

[Ads912]

Thanks guys, very interesting. It is not dependant on fuel load. The engine will die even if your foot is off the gas. It happens suddenly.
It sounds like I will have to dig into the wiring....starting with what is outside of the engine cover.

Adam.