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-   -   excellent way to test injectors on 78 911 (http://forums.pelicanparts.com/porsche-911-technical-forum/574957-excellent-way-test-injectors-78-911-a.html)

grantsmells 06-30-2015 04:19 AM
Quote:
Originally Posted by stormcrow (Post 8688204)
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 06-30-2015 04:40 AM
bosch did not use a sealer, i would not.

rothaus 07-02-2015 09:16 AM
Quote:
Originally Posted by 74-911 (Post 8675827)
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 07-02-2015 10:44 AM
Safety switch.......
 
Quote:
Originally Posted by rothaus (Post 8693324)
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 07-04-2015 05:16 AM
Quote:
Originally Posted by boyt911sc (Post 8693486)
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


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