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bennkishh
Joined: 18 Aug 2012
Posts: 19
Location: Hunterdon county, Central NJ
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 Posted: Tue Oct 09, 2012 5:15 am Post subject: 2 litre won't start most of the time |
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1981 2 litre 5 speed 924. Sometimes it starts right up, but a lot of times it just cranks. There's a half tank of new gas, and a good battery in it. When it doesn't start, it cranks great. Any suggestions?
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81 924 Weissach Celebration Edition (just traded) |
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joejax
Joined: 02 Dec 2009
Posts: 919
Location: Jacksonville,FLA,USA
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| Posted: Tue Oct 09, 2012 9:11 am Post subject: |
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Does your car not start when it is:
A: Cold
B: Warm
C: Hot
D: All of the above ?
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Uhhh...you got any pics? |
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bennkishh
Joined: 18 Aug 2012
Posts: 19
Location: Hunterdon county, Central NJ
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| Posted: Tue Oct 09, 2012 10:00 am Post subject: |
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| joejax wrote: | Does your car not start when it is:
A: Cold
B: Warm
C: Hot
D: All of the above ? |
All of the above. Maybe warn more than any of the other options.
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81 924 Weissach Celebration Edition (just traded) |
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joejax
Joined: 02 Dec 2009
Posts: 919
Location: Jacksonville,FLA,USA
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| Posted: Tue Oct 09, 2012 12:39 pm Post subject: |
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Fuel accumulator may be bad, causing fuel pressure leak down, check little screw for leaking fuel. Some have installed a 'hot start switch' to engage cold start injector to get fuel going.
This may sound crazy, but, might want to try different ways of starting; gas pedal to the floor when hot, or maybe half way, or not at all. I have had varying results with this, usually when it's warm or hot I floor it then let off when it starts to go.
If that doesn't work, could likely be a problem with the WUR and/or Aux air Valve. May also be an issue with the injectors. If it runs good once started, might want to try some Techron fuel treatment.
How does it run once it gets started?
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bennkishh
Joined: 18 Aug 2012
Posts: 19
Location: Hunterdon county, Central NJ
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| Posted: Fri Oct 12, 2012 10:48 am Post subject: |
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Since its at my dads for a while I asked him to fiddle with it a bit today. He said he shot some starter fluid in to it to no availe, leading me to think that spark is the issue. I'm going to remove and replace the cap and rotor as a start. Here's to hoping!
And to answer joejax' final question, once it gets running it runs like a top. Nice high oil pressure, nice steady idle, and good temp. As of now however it's starting less and less 
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81 924 Weissach Celebration Edition (just traded) |
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staticsan
Joined: 19 Jan 2009
Posts: 450
Location: Sydney, Australia
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| Posted: Fri Oct 12, 2012 12:14 pm Post subject: |
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| joejax wrote: | | This may sound crazy, but, might want to try different ways of starting; gas pedal to the floor when hot, or maybe half way, or not at all. I have had varying results with this, usually when it's warm or hot I floor it then let off when it starts to go. |
The handbook Porsche made when the cars were new said to start it with the accelerator floored when it was hot, but with no accelerator when cold. I can also confirm the former makes it quite a bit easier to start when warm! However, I hold mine at about a quarter accelerator when cold and then for a minutes or so until the idle speed gets up.
Wade.
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'82 British NA - Which I think I've been very lucky with! |
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joejax
Joined: 02 Dec 2009
Posts: 919
Location: Jacksonville,FLA,USA
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| Posted: Fri Oct 12, 2012 12:58 pm Post subject: |
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Thanks Wade, I tend to do the same with mine, I thought I had heard it was written somewhere. 
Benn, good to hear it runs good once started, hopefully others will chime in but I would guess the WUR is probably gummed up and not working right.
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bennkishh
Joined: 18 Aug 2012
Posts: 19
Location: Hunterdon county, Central NJ
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| Posted: Sat Oct 13, 2012 3:47 am Post subject: |
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| joejax wrote: | Thanks Wade, I tend to do the same with mine, I thought I had heard it was written somewhere.
Benn, good to hear it runs good once started, hopefully others will chime in but I would guess the WUR is probably gummed up and not working right. |
Might be a dumb question, but what is this "WUR" that you speak of?
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fiat22turbo
Joined: 18 Jan 2006
Posts: 4040
Location: Portland, OR
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| Posted: Sat Oct 13, 2012 5:38 am Post subject: |
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Warm-Up Regulator
Bolted to the #4 intake runner near the firewall, below the coil.
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Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose) |
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bennkishh
Joined: 18 Aug 2012
Posts: 19
Location: Hunterdon county, Central NJ
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| Posted: Sat Oct 13, 2012 5:57 am Post subject: |
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| fiat22turbo wrote: | Warm-Up Regulator
Bolted to the #4 intake runner near the firewall, below the coil. |
Ahh thanks mate! 
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81 924 Weissach Celebration Edition (just traded) |
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bennkishh
Joined: 18 Aug 2012
Posts: 19
Location: Hunterdon county, Central NJ
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| Posted: Sun Oct 14, 2012 5:43 am Post subject: |
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Distributor cap and rotor have solved the problem, my car is now starting and running again
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joejax
Joined: 02 Dec 2009
Posts: 919
Location: Jacksonville,FLA,USA
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| Posted: Sun Oct 14, 2012 8:39 am Post subject: |
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Too easy...  Good to hear.
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