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Join Date: Sep 2006
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930 pissing gas

Hi fellow Porrsssh lovers,
I posted the problem with my '76 930 on the 911 forum by mistake.
My hardly used 930 won't start after a few months in storage. About 2 months ago when I tried to start it, the engine would crank but not fire up and I noticed gas coming out of the tail pipe. I mean it was like a faucet.
So, I let it sit for a while to dry out the gas so it won't blow up.
A few days ago I changed the plugs, checked spark, checked fuel pumps, everything seems to be ok. There's spark and gas is coming out of the fuel filter.
But it still won't fire up and this time no gas flows out of the tail pipe but I can smell it.
When checking the relays for the fuel pumps, I noticed that the fuel pumps won't buzz when the relay for the per window is installed. When I remove the relay for the pwr windows, the pumps would buzz.
How strange!
Anyone out there with similar problems and can give me any tips would be greatly appreciated. Thanks.
Old 10-14-2007, 01:48 PM
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Location: Sweden
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You might be running too rich for some reason. Check that CIS flapper is moving freely. It might be stuck in "open" position.
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Old 10-15-2007, 01:35 AM
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Thanks for your help beepbeep. Several people have suggested that something is stuck in the open position,.... the plunger in the fuel distributor. I looked at the diagram of the fuel distributor at this website but there's no explanation to the diagrams. I don't have too much knowledge of the fuel injection system. I'm still stuck in adjusting points, timing with a timing light and all that good stuff.
I'll check the flapper as you suggested, if I can find it. Thanks again
Old 10-15-2007, 07:42 AM
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Remove the air cleaner assy.
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1981 UK 930. G50/01 shortened, 964 3.8RS Fibreglass Body Kit, 18" Alloys 8.5" F & 10" R, 225's F & 285's R, Special Colour Metallic Blue Paint, FIA Sparco Evo's, A/C and Air Pump removed, Electronic Boost Controller, GHL Headers, Tial46 WG.
Fitting - New service kit.
Needs Fitting - Innovate XD-16 Kit, Kokeln IC. Stephen's K27 HFS, EVO Intake Assy & his Modded USA Fuel Head.

1983 UK 911 3.2 Carrera Sport Coupe. Black, Black Leather with Red Piping, Black Alloy Gear Knob, K&N Air Filter Element, Turbo Tie rods.
Needs Fitting - K&N CO Sensor, Round A/F Dial Gauge, Factory Short Shift Kit.

http://www.danasoft.com/sig/Iamnotanumber.jpg
Old 10-15-2007, 10:46 AM
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Thanks Nathan, I've removed the air cleaner assy, took out the fuel supply to check if fuel is going to the mixture unit. Fuel is going to the mixture unit. Then I took out the bolt (#16 on the Mixture control parts diag.) Sprayed some cleaner/starting fluid inside and put them back on again. Still won't start.
Old 10-15-2007, 04:01 PM
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If you remove the filter assembly, you will se a round hole with a disc on it. The disc moves down when air passes by. The longer down it moves the more fuel gets squirted into engine.
If this "disc" get stuck the fuel injection will keep squirting same amount of fuel into engine regardless of throttle position.

The plunger is kept from being fully depressed by pressure difference between "control pressure" and "system pressure". Thus it's important to measure these things in order to troubleshoot CIS fuel system. There are many posts on Pelican Parts covering this issue.

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Old 10-16-2007, 12:27 AM
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