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#Post#: 55925--------------------------------------------------
2.25 petrol starvation?
DIR By: Parn
Date: April 1, 2013, 4:26 am
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Hi Guys
I require help from those much more experienced than I.
I have a 4 cylinder petrol in a series 3 109 (high compression
version).
99.9% of the time it goes like a train (well for a Land Rover
anyway)
BUT the problem occurs when it is turned off after a descent run
(half an hour or more).
If the vehicle sits for about ten minutes and then started it
runs fine for about a minute then displays all the symptoms of
fuel stravation. It misses, cough and splutters. I am sure it is
fuel stravation because pulling the choke out eases, but does
not cure the problem. After several minutes of misbehaving all
becomes well again and there are no more dramas until after the
next "hot" start.
The engine stock apart from a webber carby and an electronic
distributor.
I have replaced the fuel pump and rerouted and insulated the
fuel line with no change to the problem.
When first stopping the carby is cool to touch but after 10 mins
is almost too hot to hold your hand on. Is this normal?
It feels like the engine uses all the fuel in the carby and then
has trouble getting additional fuel in sufficent quantities to
keep it all going.
What have I missed?
Please help it is driving me nuts
Cheers
Alan
#Post#: 55930--------------------------------------------------
Re: 2.25 petrol starvation?
DIR By: Albert Ross
Date: April 1, 2013, 6:11 am
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You have mentioned the problem already. My suggestion is to
remove the Weber 34ICH and use it as a doorstop. They're shit.
Originally designed for an 1100cc Ford engine. It has it's
supporters but I'm not one of them. Use a correct spec Zenith
36IV (or indeed a later "Solex" 36IV labelled unit, which is
identical) or better still find a pre-1967 Solex PA40 carb, if
you can, and you will find it more torquey, less thirsty, and
all together a smoother drive.
#Post#: 55931--------------------------------------------------
Re: 2.25 petrol starvation?
DIR By: mark yellow
Date: April 1, 2013, 6:29 am
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I couldnt get mine to run right on a webber. Stuck a zenith on
it and it drove like a new vehicle.
#Post#: 55944--------------------------------------------------
Re: 2.25 petrol starvation?
DIR By: NoelC
Date: April 1, 2013, 12:10 pm
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--- Quote from: Parn link ---
>
> What have I missed?
--- End Quote ---
Do you have twin tanks (i.e. ex-military 109)?
If so, check the cork seal in the changeover tap. I've had
issues going back some time with the ambulance, it's had 3 fuel
pumps and 2 carbs and still exhibited fuel starvation (worst
under load) and I only discovered last week the fuel tap was the
culprit, swapped that for another and it's as good as gold now.
Cork seals can be had on eBay for less than 3 quid.
HTML http://i96.photobucket.com/albums/l176/Effortless01/Landy%20stuff/926e7a05.jpg
Other than that, Jim speaketh the truth. The Weber 34ICH is fit
for target practice but not a lot else in my experience, a
Zenith or Solex is the way to go.
#Post#: 55998--------------------------------------------------
Re: 2.25 petrol starvation?
DIR By: Parn
Date: April 1, 2013, 5:25 pm
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Thank you all for the prompt replies.
I will see if I can find a reasonable Zenith.
The original had badly ovalated the housing around the shaft for
the butterfly valve.
Thanks again
Cheers
Alan
#Post#: 56743--------------------------------------------------
Re: 2.25 petrol starvation?
DIR By: Parn
Date: April 10, 2013, 7:19 pm
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Latest update:
I have removed the "in-line" fuel filter (and sent it to god)
I have replaced the Webber with a Zenith 361V which I have put a
kit through and "flattened" all the mating surfaces.
I have also removed the fuel pick up pipe from the tank and
ensured there is no blockage or obstruction in that or in any of
the fuel lines.
The problem it is not as bad as it was BUT it is still straving
for fuel at the top end of the "rev-range" immediatelty after a
"hot start".
The only possible solution I can think of is the new fuel pump
is dodgey.
I need some positive thoughts this driving me NUTS.
Thanks
Alan
#Post#: 56746--------------------------------------------------
Re: 2.25 petrol starvation?
DIR By: Bert the Bodger
Date: April 11, 2013, 1:54 am
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Just to ensure that your fuel tank is breathing correctly, try
removing the filler cap before your next hot start. If the tank
'inhales' you'll have identified the problem.
Richard
#Post#: 56852--------------------------------------------------
Re: 2.25 petrol starvation?
DIR By: Parn
Date: April 11, 2013, 6:42 pm
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Hi Richard
Thank you for your response
I forgot to mention I had removed the fuel cap vent and ensured
it was working.
Once again it did not appear to have any restriction or any
thing that would impede air flow other than the standard fibre
plug. I put this back in and it appears to work
But I will try removing the cap whilst the problem is occuring.
Thanks Again
Alan
#Post#: 56916--------------------------------------------------
Re: 2.25 petrol starvation?
DIR By: NoelC
Date: April 12, 2013, 12:42 pm
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I had an issue with a brand new Allmakes pump causing the same
symptoms come to think of it, the cure was a second had proper
AC one I robbed off a scrapper. It could well be that.
#Post#: 58704--------------------------------------------------
Re: 2.25 petrol starvation?
DIR By: MANILA THRILLA
Date: April 25, 2013, 11:53 pm
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If your carburetor is too hot to touch you probably have vapor
lock.
Had a similar problem, fitted a aux. electric fan and
temperature switch to keep engine temperature lower.
Cheers
Helmuth
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