82SC 911 Frequency Valve

[vizail]

Another question for my fellow Porsche Friend's.
Is the Frequency Valve a flow Valve too?
I know is call the Lambda Valve and/or Timing Valve.Recently I was inspecting an old and a newone and I notice that the flow goes one way but not the other. Correct me if I'm wrong.

Cordially

Vic

[vizail]

Ok Now....., the 24 DAYTONA is over...., Can someone help me here

Vic

[vizail]

Ok Guys ............, At least one reply Ok.!

Vic

[Jim Williams]

Hi Vic,

The frequency Valve is designed for flow to go one way. I've never tried to hook one up backwards, but it's possible that fuel will go in the reverse direction. When there's no power in the form of a duty-cycle type wave form being applied, the FV is closed. It varies it's flow with the change in duty cycle up to about a 90% figure. It's made much the same as an injector. The m ore of the time it's open, the lower the pressure in the lower chambers of the fuel distributor, richening the fuel mixture.

[vizail]

I have to get power from the WUR to the 87(rallay) to activate the circuit and the OXS Control Unit.?

Vic

[Jim Williams]

The WUR and the Frequency Valve control two separate inputs to the fuel distributor. They don't share the same electrical circuits. The WUR doesn't control any electrical circuits. Could you be more specific about what you are having trouble with? The FV or the WUR or both? I think Pelican has wiring diagrams of at least one 911 model with the Lambda system, I think an '82, that will show the wiring connections for the WUR. I have an electrical diagram of the Lambda system on my Rennlist site. Click on the "WWW" button below to go there.

[vizail]

According to my wiring diagrams (both Bentey's and Original) in the 1980 t0 1983 model the red/withe wire from the Fuel pump relay #30 is maried with the black wire. In some place I loose electricity and I cant activate the FV relay in 86 terminal at the FV rellay.The relay is powered (live) +#30 negative-#85


Cordially

Vic

[Jim Williams]

Vic,

I don't have the Bently Manuals, so the diagrams you posted aren't helping me understand your problem. Did you go to my website and look at the diagrams there? The diagrams I posted there are from the Porsche factory manuals. The printed names of the wire colors don't show up very clearly, but I can't find the black wire you speak of either on your diagrams or on my diagrams. The same connection that powers the fuel pump also powers the WUR, the AAR, and the relay that in turn powers the Frequency valve and the Lambda electronics box. These are all red/white wires.

The O2 (Lambda) relay under the seat next to the O2 box is supposed to have pin 30 "hot" all the time. (I think without exception than all terminal 30s are connected directly to the battery). When ever the fuel pump is running, you should have 12 Volts at pin 88 on the O2 relay. If the relay is working properly then you should have power to the FV. Note that if you check the voltage at the O2 relay without the engine running, OR when the engine is being started, you should not see voltage.

[vizail]

Jim
Is not Pin 88 is Pin 86,, and rigth there is the problem. I'm not getting an electric signal to activate the rellay that in turn supply current to 87 and 87b that supply the FV.
Is there a connector between the FV and the WUR? Probably the Bulkhead Connector?

Vic

[vizail]

Jim

Terminal 86 have a T14 and an I13. According to my diagrams the 12v comes from this cable. This is the one that Activates the rellay?What is the meaning of I13 and T14? By the way I have the Originals and the Bentleys that have been posted. Wath does the leters and numbers inside a box means?
Cordially

Vic

[john walker's workshop]

I13, with the square around it, means go to page 1, current track 13 (the numbers along the bottom of the page) to see where the wire continues to or comes from. on page 1 you will see V1 11 in a square box, relating to the place on page 6 (V1) where it came from.
T14, T12,or any T, means a connector plug, having 2,12, 14, etc wires in it. like the black one to the left of the engine.

look at the page i sent you marked 0.1-3/89 (at the bottom right)the code is all there.

[Jim Williams]

Vic,

I 13 refers to page I (or 1), current track 13 (numbers across the bottom of the page). If you then go to page one of the Factory diagrams, and lookupward on the page from current track 13, you will find the number of the page and current track of the page you came from, which in this case is page VI , current track 11 (from the '82 model O2 factory diagram page (while the page number was not shown on the diagram on my site, was page VI or 6 ).

This means these two points, while on different pages, are electrically connected. The source of power is pin 30 of the fuel pump relay. This is one of the exceptions to the rule of pin 30 being connected directly to the battery. But it is battery voltage through the fuel pump relay.

Hope this helps.

[vizail]

Can You Guys Help me find Connector T1d and T10,14 Part I from the WUR red/wt wire Part VI current Track 11 . That's the cable that activates the FV rellay..., and rigth there is my problem. Where is that connector T1d ,because I'm not getting electrical signal to 86 FV rellay ( the FV rellay is hot Ok, 30 + and 85-ground)

Cordially

Vic

pd: By the way ,you Guys are a lot of help.!

[john walker's workshop]

you should have this page with the diagrams i sent you.

[Jim Williams]

Vic

If I remember correctly, you have to actually remove the screws holding the fuse box and pull it way from the place it is mounted in order to find this connector. I'm rembering this from having discovered this connector during an engine transplant I did a few years ago.

[vizail]

Thank you Guys . I have to search the entire car to check this wires. another ? Are this T2 (A,B,C etc) alternatives tower i can find this connectors?
yes John I found the page . Thank's

Vic