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Help needed, Carby trouble????? |
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Home away from home  
Joined:
2008/2/20 4:45
From sydney
Group:
Registered Users
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Having trouble adjusting the idle on my A12, it seems to run really high at idle and it can't be adjusted any ferther. I have an electric fuel pump but no regulator, Could that be the problem? I'm running a fuelmiser electric fuel pump, the stock mechanical pump stuffed and i replaced it with the electric unit.
Would adding a fuel regulator fix the problem of high revs at idle? what pressure would i need to run for just a 32/36 downdraft weber?
Posted on: 2009/10/4 9:40
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Re: Help needed, Carby trouble????? |
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No life (a.k.a. DattoMaster)  
Joined:
2003/10/13 7:32
From newcastle, NSW
Group:
Registered Users
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Check out WIKI, i'm pretty sure the webber needs pretty much the same as the standard hitachi unit, 2.5-3psi and 450 ml/minute minimum flow rate.
Do you know what your electric pump flows at? is it a high pressure or low pressure pump? if it has poor fuel economy aswell as high idle, then you'll find you will probably need to run a fuel reg, it's pretty much recommended anyway.
Posted on: 2009/10/4 10:51
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Re: Help needed, Carby trouble????? |
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Just can't stay away  Joined:
2008/10/30 0:14
From Melbourne
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Registered Users
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You probably have an air leak into the inlet manifold - sticking secondary throttle, leaking carb base gasket or manifold gasket, split PCV hose etc. Unlikely to be fuel pressure.
Posted on: 2009/10/4 12:27
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Re: Help needed, Carby trouble????? |
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No life (a.k.a. DattoMaster) 
Joined:
2008/6/2 10:46
From hastings,vic
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Registered Users
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sounds like u have a air leak
probly manifold gasket??
tommo
Posted on: 2009/10/4 12:29
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_________________
taking up room at home
3 now 2 1200 sedans,3 now 2 1200 coupes,3 now 2 1200 utes
1 1000 wagon,2 s13 silvia's,tranzit tray
hzj75 cruzer tray(for sale)
and allways changing
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Re: Help needed, Carby trouble????? |
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Home away from home Joined:
2008/2/20 4:45
From sydney
Group:
Registered Users
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air leak is the first thing i thought, but the gaskets have been replaced and everything is nice and tight. i'm just trying to elimiate posibble causes, I'm not sure how much the pump flows, not sure if its a low pressure or not, it was given to me. All i know is it is a fuelmiser fuel pump.
Posted on: 2009/10/5 5:11
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Re: Help needed, Carby trouble????? |
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Home away from home Joined:
2008/5/18 12:20
Group:
Registered Users
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your needle and seat may be leaking,
Posted on: 2009/10/5 5:33
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_________________
finally gettin the ca18 ute project underway
Sunny’s were made to be drifted, it says so in the factory service manual: Service after every drift day and mountain tounge or 100,000km’s
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