jonbeedle
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| posted on 21/3/06 at 09:45 PM |
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Running rough!
Hi,
Took my car up to Eye Airfield in Suffolk on Sunday to give it it's first real blast. Handling, brakes and everything was spot on. I even got a
chance to calibrate my speedo using my GPS. The only downer was that everytime I tried to give it some welly it coughed and spluttered as though it
had fuel starvation. When I was gentle on the throttle it behaved until it got to around 45-50 and then it started spluttering again
This could be down to a knackered or dirty carb. I haven't done anything to the carb at all. I just bolted it back on after I had the unleaded
conversion done, so I'm suspecting that it could be full of crap. Anyway my problem is that I can't seem to get spares or a service kit
for this type of carb or even an exchange reconditioned one. It's the standard mk2 Escort 1300 xflow single downdraft one. I could change to a
twin choke weber but I'd rather not at the moment as it would mean chopping the bonnet about and I've shelled out for a K&N filter
which wasn't cheap and I just want to get it through the SVA without too much messing about. Does anyone know where I can get bits or an
exchange one or perhaps there's a place that specialises in overhauling carbs?
By the way all the ignition components are new and I plan to check the vac' advance etc.
Any help appreciated.
Cheers
Jon
"Everyone is entitled to an opinion however stupid!"
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jimmyjoebob
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| posted on 21/3/06 at 09:53 PM |
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I had problems like these on rebuilding my essex v6 engine - I had major hesitation on booting the throttle. Old distributor advance was all over the
place so fitted new bosch one and problem disappeared. Other than that, check all the obvious things like inlet manifold leaks etc. Leaking rocker
breathers always catch me out...
If at first you don't succeed, hide all evidence you ever tried!
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Danozeman
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| posted on 21/3/06 at 10:11 PM |
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Check for air leaks on the inlet manifold etc mate. Also check your timing and points etc.
It might be worth getting it tuned up properly with a krypton tuner or something so its all spot on.
Wish id have known you were going sunday i would have popped along. I only live down the road. I have actually just been right past it to a fun anti
natal class.
Dan
Built the purple peril!! Let the modifications begin!!
http://www.eastangliankitcars.co.uk
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UncleFista
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| posted on 21/3/06 at 10:47 PM |
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I have the same carb sat doing nowt in the cellar 
It got us through the SVA and worked fine when it was last used almost a year ago.
It's yours for the cost of postage if you want it, either as a replacement or spares, it's no use to me
Tony Bond / UncleFista
Love is like a snowmobile, speeding across the frozen tundra.
Which suddenly flips, pinning you underneath.
At night the ice-weasels come...
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britishtrident
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| posted on 21/3/06 at 10:51 PM |
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The Ford Fomoco/Autolite carb was never the best I changed quite a few by fitting kits that had single choke Solex or Zenith or Weber carbs and
adaptor plate.
However from the description of the symptoms I suspect the real prblem is either lack fuel flow into the float chamber or weak mixture the change of
air filter causing a weak mixture -- normally the air would have drawn in hot air from over the exhaust manifold. If you have an airfilter that pokes
through the bonnet the problem will be even worse.
[Edited on 21/3/06 by britishtrident]
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907
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| posted on 21/3/06 at 11:10 PM |
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Hi Jon,
Firstly, I'm no expert on this sort of thing so this may be tosh, but is this carb
the type with an accelerator pump?
I had a car once that spluttered when you booted it, and it turned out that it
was a split in a rubber diaphragm that squirted fuel through a hooked shape (techy term)
jet just above the throttle butterfly.
Go on, shoot me down.
ATB
Paul G
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jonbeedle
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| posted on 22/3/06 at 02:25 AM |
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Yes please. Let me know what postage is and I'll send you it by Paypal or cheque or whatever.
Thanks
Jon
quote:
Originally posted by UncleFista
I have the same carb sat doing nowt in the cellar
It got us through the SVA and worked fine when it was last used almost a year ago.
It's yours for the cost of postage if you want it, either as a replacement or spares, it's no use to me
"Everyone is entitled to an opinion however stupid!"
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jonbeedle
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| posted on 22/3/06 at 02:27 AM |
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Hi Paul,
You're probably right! It has an accelerator pump and it may well be knackered. I intend to strip it and investigate!
Cheers
Jon
quote:
Originally posted by 907
Hi Jon,
Firstly, I'm no expert on this sort of thing so this may be tosh, but is this carb
the type with an accelerator pump?
I had a car once that spluttered when you booted it, and it turned out that it
was a split in a rubber diaphragm that squirted fuel through a hooked shape (techy term)
jet just above the throttle butterfly.
Go on, shoot me down.
ATB
Paul G
"Everyone is entitled to an opinion however stupid!"
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britishtrident
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| posted on 22/3/06 at 09:55 AM |
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The accelerator pump only works when you initially put your foot on the throttle hard from low throttle opennings. put your foot down slowly and
instead of the fuel being squirted through the pump jet the fuel spills back into ther float chamber.
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tks
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| posted on 22/3/06 at 02:18 PM |
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yeah...
but maybe it floods..
if the diagram is broken??
Would it suck out the fuelcamber??
Dunno the carbs/ engine..
but an engine responding like that
have to general reasons...
- mixture to lean or to rich..
- timing advance...
i personally think its the mixture because else it would rev when giveing time..
altough saying that that the sparks gives the most BHP.... in the comparison between nowadays engines and older engines....
The above comments are always meant to be from the above persons perspective.
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DIY Si
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| posted on 22/3/06 at 06:54 PM |
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Sounds like it's due to the K&N. If the carb hasn't been set up after fitting it, the carb will be set for the standard crappy factory
job. The K&N will flow way more air and it'll run lean most of the time. Hence the problem at more than a bit of throttle. As said above,
having it out in the cold will make this problem worse.
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