Isn't that why you depress the accelerator once on cold start up to reset the choke? or am I thinking of something else?DoubleOSeven wrote: ↑31 Jul 2020, 11:48
Cold Carb. This should be closed but it isn’t or wasn’t should I say. Still checking for air leaks.
Stalling when dizzy vacuum removed
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Re: Stalling when dizzy vacuum removed
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Re: Stalling when dizzy vacuum removed
You are correct, depress the accelerator & it closes.
So, borrowed a carb., runs like a dream. So it is not an air leak.
However, initially it also struggled & stalled; why, low fuel, very low fuel. I've had this issue before, when I'm down to <5L it struggles for fuel pressure I assume. This does stack up, not enough fuel, air trying to compensate & over compensating.
So, filled it up with fuel on borrowed carb., seems fine. I'll run it for a bit; then swap my carb back on and I reakon it'll be ok.
(Thanks to Wilbur for borrowed carb., soon to go on his new singlecab - so a good run will do it good in preparation)
So, borrowed a carb., runs like a dream. So it is not an air leak.
However, initially it also struggled & stalled; why, low fuel, very low fuel. I've had this issue before, when I'm down to <5L it struggles for fuel pressure I assume. This does stack up, not enough fuel, air trying to compensate & over compensating.
So, filled it up with fuel on borrowed carb., seems fine. I'll run it for a bit; then swap my carb back on and I reakon it'll be ok.
(Thanks to Wilbur for borrowed carb., soon to go on his new singlecab - so a good run will do it good in preparation)
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Re: Stalling when dizzy vacuum removed
Consensus to where Pierburg air/fuel mixture screw should be, for when I put my carb back on? It's been moved so much now, I don't now what's right..
3.5 turns anti-clockwise from closed?
3.5 turns anti-clockwise from closed?
Last edited by DoubleOSeven on 31 Jul 2020, 23:59, edited 1 time in total.
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Re: Stalling when dizzy vacuum removed
937carrera wrote: ↑30 Jul 2020, 21:28 "That much advance" is indicative I suspect of a weak mixture, so yes air leaks, including from that servo hose. Numbers are better than descriptions though.
I was starting to think blocked jets... but it could be either
Seems a decent chance that it's the latter rather then the former.
Easy to remove & clean, at least on a weber, don't know about those Pierburgs
I seem to remember 3.5 turns from elsewhere, itchyfeet will have a post, or James Akers website will have the answer
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Re: Stalling when dizzy vacuum removed
Good shout, I was leaning towards blocked jets too, I'll clean them before putting it back on & check out james' site.
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Re: Stalling when dizzy vacuum removed
2.75 turns out for air/fuel mixture screw on James Akers' ebay rebuild carb.
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Re: Stalling when dizzy vacuum removed
Blocked Jet !
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Re: Stalling when dizzy vacuum removed
Yay !
Blocked jet, reduced fuel, weak mixture, more advance required.
Nice easy fix, but you'll have to finalise the fuel and timing all over again
Blocked jet, reduced fuel, weak mixture, more advance required.
Nice easy fix, but you'll have to finalise the fuel and timing all over again
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Stalling when dizzy vacuum removed
All fixed, timing, mix, idle.
Running like a swiss clock again.
Summary; low fuel + blocked jet.
Running like a swiss clock again.
Summary; low fuel + blocked jet.
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Stalling when dizzy vacuum removed
It’s been an absolute pleasure driving the bus this week. Purring like a kitten. Best service it’s ever had.
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Acton Field Camping, Swanage avoids the hoards at Tom’s Field next door. Shush, don’t tell everyone
1990 Volkswagen Transporter 2.1 Manual
2005 Porsche 911 3.6 Manual
2012 Volkswagen Polo 1.4 Automatic
2005 Porsche 911 3.6 Manual
2012 Volkswagen Polo 1.4 Automatic