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cord68's Avatar
 
Join Date: Nov 2005
Location: sydney
Posts: 103
Garage
Angry Desperately need help

I need help I have a fuel problem they I just cant get right. I recently rebuilt fuel distributor when I resembled the distributor I made sure I lined up center shaft so that
The o’rings all lined up. I double checked this after I put back in the car with the ignition on I get a slight drip from each line to the injector. When the car is cold I set fuel pressure at 25 psi as the car warms up it increase to around 55 psi if I tap the warm up regulator down to 52 psi it stays there for about five minutes then the fuel pressure starts to increase. Once the car is warm it seams the fuel pressure keeps increasing. The car starts popping out the exhaust and I can’t set mixture in it doesn’t matter what I do its running way to rich. Where am I going wrong .I no I am missing something but what.

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1974 911 2.7L? Targa
NPCC- 1142
Old 11-13-2006, 07:40 PM
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Walt Fricke's Avatar
 
Join Date: May 2004
Location: Boulder, Colorado
Posts: 7,275
Porsche Crest

Which fuel pressure: system pressure or control pressure?

Might there be a restriction in the fuel return (back to the tank) system? A pinched hose?

Some lines inadvertently switched when things were hooked back up?

What drip? An external drip? A drip out of the injectors when there should be none? Or you only get a slight drip (from an injector, or the end of a line disconnected from an injector?) when you expect more?

You are a braver man than I - I've never cracked a FD open.

Walt
Old 11-13-2006, 08:13 PM
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Join Date: Nov 2005
Location: sydney
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The drip is when I disconnect the fuel line to the injector. The first time I pulled the fuel distributor apart and resembled and number one injector had fuel flowing at about a liter a minute. So I pulled apart a second time and noticed that I split an o’ring and reassembled a second time this checking all injectors with only a small drip with ignition on .so I am pretty sure the f/d is okay. I did check the return line but only to where the soft line goes to hard line and fuel seem to flowing pretty well. I will check it at the tank. as for fuel pressure I put the gauge from the warm-up reg back to the f/d.

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1974 911 2.7L? Targa
NPCC- 1142
Old 11-14-2006, 12:46 AM
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