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Ozzie
Joined: 12 Mar 2005
Posts: 4448
Location: Townsville, Qld. Australia
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 Posted: Fri Aug 12, 2005 8:38 am Post subject: |
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OHHHHH. Must have the US vacuum setup.
All that emission control stuff must drag HP from the motor.
I prefer KISS method.
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Porsche 924 1984 (UK import) NA
Its AUTO and its BLACK
Montego Black on black/red
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Gram
Joined: 08 Feb 2005
Posts: 357
Location: Northland, New Zealand
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| Posted: Fri Aug 12, 2005 8:43 am Post subject: |
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Certainly complicates sorting out a vacuum leak..
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'82 924 NA Euro (hers)
'98 Audi A4 TDI (ours) |
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Ozzie
Joined: 12 Mar 2005
Posts: 4448
Location: Townsville, Qld. Australia
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| Posted: Fri Aug 12, 2005 8:46 am Post subject: |
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Not to mention taking up space.
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Porsche 924 1984 (UK import) NA
Its AUTO and its BLACK
Montego Black on black/red
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tj924
Joined: 15 Jul 2004
Posts: 957
Location: Toowoomba, Queensland, Australia
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| Posted: Fri Aug 12, 2005 9:23 am Post subject: |
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Here is the vacuum diagram for my '82 NA
Nowhere near as complicated as some of the ones I've seen and yes, the 2nd hose for the carbon canister just hangs down inside the fender rather than actually connecting to anything. There doesn't appear to be a hole in the fender for it to come back through either. Also, on the stock Aus delivered cars the distributor vacuum advance is actually plugged off (ie no vacuum line to the distributor). If you check the PET you will see a plug listed on the distributor vacuum valve for Aus only.
| Ozzie wrote: | | Decel Valve? Vacuum Valve? I don't have those. Mine just goes to the crankcase breather |
The Vacuum Limiter in the diagram is also known as the deleleration valve, but I suspect you know that.
Do you have a pic or diagram (modify the one I posted maybe) of your simplified system? Just can't picture where on the block the "crankcase breather" lives.
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TJ
Silver '82 924 NA 5-Speed Manual |
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Ozzie
Joined: 12 Mar 2005
Posts: 4448
Location: Townsville, Qld. Australia
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| Posted: Fri Aug 12, 2005 10:02 am Post subject: |
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If the pic above doesn't show up try this link
http://community.webshots.com/user/jaynar57
I think the decel valve is there for manuals but not carbon can.
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Porsche 924 1984 (UK import) NA
Its AUTO and its BLACK
Montego Black on black/red
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tj924
Joined: 15 Jul 2004
Posts: 957
Location: Toowoomba, Queensland, Australia
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| Posted: Fri Aug 12, 2005 10:11 am Post subject: |
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Thanks Ozzie. Where is the crankcase breather? Got a pic?
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TJ
Silver '82 924 NA 5-Speed Manual |
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Ozzie
Joined: 12 Mar 2005
Posts: 4448
Location: Townsville, Qld. Australia
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| Posted: Fri Aug 12, 2005 10:23 am Post subject: |
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It is right behind where the LH engine mount attaches to the motor.
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Porsche 924 1984 (UK import) NA
Its AUTO and its BLACK
Montego Black on black/red
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tj924
Joined: 15 Jul 2004
Posts: 957
Location: Toowoomba, Queensland, Australia
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| Posted: Fri Aug 12, 2005 11:17 am Post subject: |
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| Ozzie wrote: | | It is right behind where the LH engine mount attaches to the motor. |
Gee, sounds like its nice & easy to find & work with...NOT.
I assume thats LH from the drivers perspective rather than from the front of the car (ie its on the same side as the battery on our cars)?
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TJ
Silver '82 924 NA 5-Speed Manual |
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Ozzie
Joined: 12 Mar 2005
Posts: 4448
Location: Townsville, Qld. Australia
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| Posted: Fri Aug 12, 2005 11:23 am Post subject: |
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Actually it is a pain to do the clamp up where the 3/4" hose fits on.
part 047 103 221 on PET.
But it is pretty open under the throttle body once you can get your hands in.
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Porsche 924 1984 (UK import) NA
Its AUTO and its BLACK
Montego Black on black/red
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tj924
Joined: 15 Jul 2004
Posts: 957
Location: Toowoomba, Queensland, Australia
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| Posted: Fri Aug 12, 2005 11:40 am Post subject: |
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| Ozzie wrote: | | ...once you can get your hands in... |
And therein lies the problem huh!
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TJ
Silver '82 924 NA 5-Speed Manual |
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Ozzie
Joined: 12 Mar 2005
Posts: 4448
Location: Townsville, Qld. Australia
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| Posted: Fri Aug 12, 2005 11:43 am Post subject: |
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Very likely the hose I am talking about goes to the air filter on your car.
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Porsche 924 1984 (UK import) NA
Its AUTO and its BLACK
Montego Black on black/red
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tj924
Joined: 15 Jul 2004
Posts: 957
Location: Toowoomba, Queensland, Australia
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| Posted: Sat Aug 13, 2005 10:35 pm Post subject: |
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| Chrenan wrote: | | Quote: | | I pulled the screw out of the bottom of the accumulator (which is leaking) & attempted to stop it dripping by putting it back in with some plumbers tape. |
...but pulling the screw and sealing it won't solve anything other than a slow fuel drip.... |
Yep, I was only expecting to fix the slow fuel drip as I wasn't having any hot start issues (just cold start) even with the accumulator leaking. My hot start problem only happened after last weekend when I tried to seal up the hole, replaced a couple of fuel lines & got a new battery.
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TJ
Silver '82 924 NA 5-Speed Manual |
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Khal
Joined: 26 Sep 2003
Posts: 4872
Location: Sunny and lovely interior BC, Canada
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| Posted: Sun Aug 14, 2005 12:54 am Post subject: |
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Bet you still haven't checked your fuel pumps...
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'80 924 Turbo |
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tj924
Joined: 15 Jul 2004
Posts: 957
Location: Toowoomba, Queensland, Australia
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| Posted: Sun Aug 14, 2005 9:00 am Post subject: |
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| Khal wrote: | | Bet you still haven't checked your fuel pumps... |
 Not yet Khal, but it's on the list. I'm actually not sure the in-tank pump has ever worked since I got the car. About 6 months ago I found one of it's electrical wires was just hanging loose so I plugged it back in & zip tied it so it wouldn't come out again. Didn't make any difference to anything at the time, but I wasn't having any starting issues (hot or cold) at the time either. Also, I don't have any hesitation under hard acceleration, which I thought would be a sign of a failing fuel pump. Need to do the flow test to check huh!
Anyone have a test procedure for the in-tank pump? The external pump is pretty load (always has been), so listening to see if the in-tank pump is running would be a little hard unless I first electrically disconnect the external pump.
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TJ
Silver '82 924 NA 5-Speed Manual |
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leadfoot
Joined: 11 Dec 2002
Posts: 2222
Location: gOLD cOAST Australia
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| Posted: Sun Aug 14, 2005 1:54 pm Post subject: |
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Fuel filter blockage, popping on decceleration is either vaccum or fuel mixture.
Leaning out of the mixture certainly causes popping. Also having a 2.5 inch exhaust does this 
I would get a fuel presure gauge and check the system pressure.
This could be your injector bungs are sucking in air but I wolud look at loss in fuel pressure being the culprit. Could be your warm start solenoid is kaput.
Your fuel pump will also sound very loud if the filter is blocked, so if you haven't replaced this in 20,000km then I would suggest this as you may have sucked in some dirty fuel.
You can do a quantitive test as a basic start, but a pressure gauge would be the best solution as you can put in before and after parts to maintain consistent fuel readings.
Leadfoot
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1981 ROW 924 Turbo -
carbon fiber GT mish mash
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