|
|
|
|
| Author |
|
|
Registered
|
different SC fuel pumps
I have an '82 SC motor in my '77. The car is running horribly... it starts up but won't take any throttle. RPM's stay about 1k, ven with WOT. The ignition checks out fine, so now I am at the fuel system check. I disconnected the line at the bottom of the fuel accumulator and tested the volume output by the fuel pump. In 30 sec it only puts out 16 oz of fuel rather than the spec of 35 oz. I have a fuel pump from a '79 SC on the shelf. Do you think it will work, even though the parts catalogue list a different part num for an '82 SC fuel pump? Does anyone know the differenceand is the difference critical?
__________________
77 911, 3.0L |
||
08-29-2004, 12:53 PM
|
|
|
Registered
Join Date: Jun 2000
Location: bottom left corner of the world
Posts: 22,741
|
Ha, funny you should ask this Doug. I did (fairly much) this yesterday and it works fine. Thanks to Dave for his good advice CIS fuel pumps I fitted it up and the car goes beautifully.
|
||
|
08-29-2004, 01:18 PM
|
|
|
Registered
|
Bill,
Is there a different size fitting that connects the fuel line , or can I expect to just tighten up my fuel line without having to use some kind of adapter?
__________________
77 911, 3.0L |
||
|
08-29-2004, 05:06 PM
|
|
|
Registered
Join Date: May 2000
Location: Los Alamos, NM, USA
Posts: 6,044
|
The '79 pump should install with no problems; the fittings should match. Did this engine ever run well with the '77 fuel pump? The '77 pump return flow is rated at 850 cc/30 sec and the '82 3.0 liter requires a pump rated at 1000cc/30 sec. If the problems persist with the '79 pump you should check the tank screen for debris. The screen is above the inside hex bung in the bottom of the tank - take care as all the gas in the tank will come out when you remove the bung. Jim
|
||
|
08-29-2004, 06:26 PM
|
|
|
Registered
Join Date: Jun 2000
Location: bottom left corner of the world
Posts: 22,741
|
Doug, I unscrewed it at the blue arrow (excuse my artwork) so the fuel line T intersection etc stayed with the car and it was only the red part being swapped in.
|
||
|
08-29-2004, 08:22 PM
|
|
|
Registered
|
Bill,
thanks for the advice.... I will give it a try tomorrow.
__________________
77 911, 3.0L |
||
|
08-30-2004, 05:21 AM
|
|
|
Registered
Join Date: Jun 2000
Location: bottom left corner of the world
Posts: 22,741
|
Another thing too. Even if they look clean, clean them again, that's the earth from the fuel pump that connects where the battery earths, and disconnect the wires from the fuse and clean the connections. Also clean (light sanding) the ends if the fuse. In other words give it the best chance of getting a full voltage through. This was part of my problem, plus the fuel pump was VERY corroded.
|
||
|
08-30-2004, 01:24 PM
|
|
|
Registered
Join Date: May 2000
Location: Los Alamos, NM, USA
Posts: 6,044
|
Pack the fuel pump wiring connectors with dielectric (silicone) grease after cleaning. Jim
|
||
|
08-30-2004, 01:33 PM
|
|
