excellent way to test injectors on 78 911

[grantsmells]

Originally Posted by stormcrow

Your problem could be with the individual pressure adjustment screws that are on top of the fuel distributor.

I thought about that, but this problem seemed to come on overnight, which made me think it wouldn't be an adjustment issue. Car was running great up until then.

[T77911S]

bosch did not use a sealer, i would not.

[rothaus]

Originally Posted by 74-911

Note: for anyone with a '74 911, who is following this thread, the fuel pump on a '74 does run when the key is turned to the "on" position.

On my 82 SC the fuel pump also runs with the ignition on, before the engine is started. It's that way since I own the car.

Cheers
Engelbert

[boyt911sc]

Originally Posted by rothaus

On my 82 SC the fuel pump also runs with the ignition on, before the engine is started. It's that way since I own the car.

Cheers
Engelbert

Engelbert,

Obviously you have some anomaly in your wiring. The fuel pump for CIS engines from '76 - '83 do not run until the air flow sensor plate breaks the ground contact to energize the FP relay. You can verify this by checking terminal #85 of the FP relay socket. This will show absence of ground contact. Use a TL (test light) connected to a 12 volt source and connect the probe to terminal #85 (FP relay socket).

Tony

[rothaus]

Originally Posted by boyt911sc

Engelbert,

Obviously you have some anomaly in your wiring. The fuel pump for CIS engines from '76 - '83 do not run until the air flow sensor plate breaks the ground contact to energize the FP relay. You can verify this by checking terminal #85 of the FP relay socket. This will show absence of ground contact. Use a TL (test light) connected to a 12 volt source and connect the probe to terminal #85 (FP relay socket).

Tony

Thanks Tony for the info, I will check this out. Since the car was like that all the time, I did not even think about it. Now I have more work.

Also with all the info above, I now need to check the injectors.

Thanks
Engelbert