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Location: Louisville KY, Murfreesboro TN
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question, vacuum and fuel pressure...
I was wondering, does there have to be vacuum for the fuel regulator and damper to work? I was just wondering if maybe not having any vacuum is causing me to loose fuel pressure.
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'83 arctic silver 944 n/a Power steering? who needs it! |
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06-11-2003, 04:54 PM
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I don't quite understand your questioin, but they are connected at your throttle body. There are two ports on your throttle body. One is for your thermo-vac switch for your charcoal canister purge. it doesn't have very much vacuum, not enough to run your FPR and dampner. The other port has the proper amount of vacuum. Perhaps you got them switched around while you had the head off?
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*Disclaimer: The person above is actually dumber than he appears. my web site Torque values maintainance and repairs lots of my rebuild pics weights and measurements '84 944 auto/ps/ac/cc '86 951 Providing ignorance one post at a time. |
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06-11-2003, 05:51 PM
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Then again, that would lead to too much pressure. If you take off the vac. line and hold your finger over the port, it will cause an increase in fuel pressure. If you pull a vacuum on you FPR, it dumps fuel back to the tank.
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*Disclaimer: The person above is actually dumber than he appears. my web site Torque values maintainance and repairs lots of my rebuild pics weights and measurements '84 944 auto/ps/ac/cc '86 951 Providing ignorance one post at a time. |
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06-11-2003, 05:53 PM
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yeah, that's what I was thinking. I don't think I can feel any pressure at the regulator. The car has been having problems starting because of loss in fuel pressure for as long as I've had it. We've replaced pretty much everything in the system.
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'83 arctic silver 944 n/a Power steering? who needs it! |
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06-11-2003, 06:07 PM
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Their is a diagram of the vacume system in the engine compartment on the right front wheel well just above the windshied washer tank.
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Terry R. 1988 944 NA AT Alpine White 1987 944 NA AT Stone Grey 1987 944 NA 5 Speed Stone Grey 1987 944 S 5 Speed Triple Black |
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06-11-2003, 06:13 PM
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Yeah, my car had a fire before I bought it right there at the coil. I guess the diagram must have burned because there is nothing there. The factory manuals should have one in it.
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'83 arctic silver 944 n/a Power steering? who needs it! Last edited by pearldrum; 06-11-2003 at 06:25 PM.. |
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06-11-2003, 06:23 PM
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Tom Early '85 944 |
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06-11-2003, 07:50 PM
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Quote:
Rob
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1986 951 |
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06-11-2003, 07:57 PM
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Quote:
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'83 arctic silver 944 n/a Power steering? who needs it! |
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06-11-2003, 08:53 PM
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Which port on the throttle body should it be plugged in to?
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'83 arctic silver 944 n/a Power steering? who needs it! |
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06-11-2003, 08:56 PM
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The vaduum line from the fuel damper and regulator go to the rear most port. The line to the thermo/vacuum switch goest to the frontmost port.
This loss of fuel pressure, does it happen while the engine is running, or does the pressure bleed off while the car is sitting? If it is the latter, and you have replaced the damper, regulator, and the check valve at the pump, you probably have one or more injectors that are leaking.
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Cliff Hipsher '87 944 India Red '86 951 Kalahari Metallic |
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06-14-2003, 07:12 AM
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'84 Porsche 944 2.5L
