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Nov 21, 2005 14:10:36 GMT
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As the title really, Anyone got any experience of this ? The Syncro has a Weber direct replacement carb on it. It was Carb Icing, so last week I bought a rebuild kit and stripped the carb down. All cleaned and rebuilt with new Gaskets, Diaphrams, Idle screws, etc, runs a hell of a lot better generally, but its still Carb Icing. Going to replace the Hot air ducting tonight, along with all the VAC pipes just to be sure, but I wondered if any of you had experienced it or had links to similar problems on any of the Vdub sites ? Got to get it sorted, the car goes out to the Alps in 3 weeks time ;D Cheers Dom
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Nov 21, 2005 14:13:56 GMT
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Carb Icing - is this whilst driving, or first thing in the morning?
My 45 DCOE didn't have a choke (well it did, but I didn't want to drill another hole for the cable), so I put in two pieces of ducting from the back of the rad to the webber box - never had any probs!
.......is there a heat shield?
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I like long walks, especially when they're taken by people I don't like.
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Nov 21, 2005 14:20:46 GMT
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Carb Icing - is this whilst driving, or first thing in the morning? My 45 DCOE didn't have a choke (well it did, but I didn't want to drill another hole for the cable), so I put in two pieces of ducting from the back of the rad to the webber box - never had any probs! .......is there a heat shield? No Its proper Carb icing while driving, worse on Part throttle when the venturi effect is greater. It has a heat shield on the Exhaust manifold to shroud the air into a hose. This then connects up to the Airbox inlet Via a flap valve (Hot air or cold air feed), the hose is there but not in the best of health. I`ll replace that tonight. Might try an inverse heat sheild as well, IE try and keep the convected heat from the Exhaust manifold in the vicinity of the carb. Carb has the standard Rubber flexy spacer between it and the manifold, could loose that I suppose so the heat of the manifold transfers up.... Oh and the Manifold "Hedgehog" is fitted and working with Ignition on
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Nov 21, 2005 14:21:45 GMT
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I remember there used to be adverts in the back of Volksworld for things that will sort out carb-icing...
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Nov 21, 2005 14:41:03 GMT
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Ahhh you mean an IMDU, Inlet Manifold De-icing Unit, I had one on my bug when I had a single nikki carb, due to the extra height of the manifold adaptor, the pre heat pipes from the exhaust didnt heat the adaptor, I slapped on an IMDU, which helped, but didnt eradicate the problem, by cleaning out the pre heat pipes with caustic soda or similar it can help alot I've heard, but this is a carb and manifold off job.
What car is this on? A golf or something?
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Nov 21, 2005 14:48:30 GMT
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I had an idea about carb icing a while ago when I saw the remains of a bonfire smoking away merrily the afternoon following Guy Fawkes night. I have never tried it however. Simply place a few glowing charcoal embers in the air box before embarking on a long journey, these babies keep their heat for ages and should ensure you get to your destination.
For really long journeys keep a plastic Tupperware tub full in the boot, then you will be able to replenish the airbox daily.
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1972 Fiat 130 1985 Talbot Alpine 1974 Lancia Beta Saloon 1975 + 1986 Mazda 929 Koop + Wagon 1982 Fiat Argenta 2.0 iniezione elettronica 1977 Toyota Carina TA14 BEST CAR EVER!!!!!!!! 1979 Datsun B310 Sunny 4-dr 1984 Audi 200 Quattro Turbo 1983 Honda Accord 1.6 DX GONE1989 Alfa 75 2.0 TS Mr T says: TREAT YO MOTHER RIGHT!
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Nov 21, 2005 14:50:22 GMT
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. Simply place a few glowing charcoal embers in the air box before embarking on a long journey, these babies keep their heat for ages and should ensure you get to your destination. For really long journeys keep a plastic Tupperware tub full in the boot, then you will be able to replenish the airbox daily. Genius! ;D
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Nov 21, 2005 15:24:19 GMT
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I was talking to a chap in our local garage who likes to build cars in his spare time. Almost had a nast accident caused by carb icing on his blown rover powered capri. Giving it a blast down the motorway at wide open throttle, and it iced open fortuantly he didnt freak out he just switched it off.
Blower seem to get it quite bad, i always remember the drag guys squirting the inlet with neat methanol to de-ice the butterflies.
J
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Nov 21, 2005 15:42:57 GMT
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My mazda wagon got it real bad when I was driving it back through Belgium, I thought it was bu99ered, eventually it was so bad that it wouldn’t go up a hill on the M-way and I pulled over to call the breakdown truck. Then it occurred to me that due to all the snow etc that was falling, perhaps it was carb icing. I moved the air filter lever to the ‘winter’ position, and – bl00dy perfect.
What a car.
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1972 Fiat 130 1985 Talbot Alpine 1974 Lancia Beta Saloon 1975 + 1986 Mazda 929 Koop + Wagon 1982 Fiat Argenta 2.0 iniezione elettronica 1977 Toyota Carina TA14 BEST CAR EVER!!!!!!!! 1979 Datsun B310 Sunny 4-dr 1984 Audi 200 Quattro Turbo 1983 Honda Accord 1.6 DX GONE1989 Alfa 75 2.0 TS Mr T says: TREAT YO MOTHER RIGHT!
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Nathan
Club Retro Rides Member
Posts: 5,649
Club RR Member Number: 1
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Nov 21, 2005 16:05:05 GMT
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WOW Dom I am getting the same kind of issues well Did this week. Aint used the car for about 3 weeks and Yesterday I decided to Take the Cover off and fire her up, (She was very Clean, Only Washed it just before I covered her up) She started up a treat then the revs went Stupidly hiigh and she cut out. When looking at the Carb it had Frozen open and Fuel-Ice Was covering the inside. No Heat Shield on mine either!!
So I decided to use one of them Window Washer Warm thingyssss, you know where it passes through warm Rad water before hitting your screen, Basically I Used the Main section of one of these together with more Hose to Run around Next to the fuel line then around and under the carb Staying close to the Inlet.
Filled up me rad a bit more to compensate for the Extra Hose and tried it, (Please note the car was stone cold by the time i Finished this and it was evening, But seemed to help a bit) Will take it off when the weather is warmer
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Kris
Posted a lot
Posts: 1,631
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Nov 21, 2005 16:32:21 GMT
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My carb (fugging Pierbug 1B!) iced twice over the weekend, crusing along the motorway doing about 60-65 on very light throttle, and the engine just lost power, even changing down and keeping my foot on the floor made no difference until it cut out. Had to pull over onto the hard shoulder (I hate sitting there!!!) and left it for about 2 minutes, fired up straight away and drove normaly again. The ducting from the exhaust manifold to the airbox was missing when I bought it and haven`t bothered to replace it, I think I'll pick some up on the way back from work tomorrow and bosh together an inverse heatshield too
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Nov 21, 2005 16:35:59 GMT
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What sort of Syncro is it dude? I can't think of one off the top of my head that doesn't have the fanimold 'hedgehog' under the carb. Have a look and see if it's working.
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Nov 21, 2005 17:13:13 GMT
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What sort of Syncro is it dude? I can't think of one off the top of my head that doesn't have the fanimold 'hedgehog' under the carb. Have a look and see if it's working. Oh and the Manifold "Hedgehog" is fitted and working with Ignition on Try and keep up at the back will you!!!
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1972 Fiat 130 1985 Talbot Alpine 1974 Lancia Beta Saloon 1975 + 1986 Mazda 929 Koop + Wagon 1982 Fiat Argenta 2.0 iniezione elettronica 1977 Toyota Carina TA14 BEST CAR EVER!!!!!!!! 1979 Datsun B310 Sunny 4-dr 1984 Audi 200 Quattro Turbo 1983 Honda Accord 1.6 DX GONE1989 Alfa 75 2.0 TS Mr T says: TREAT YO MOTHER RIGHT!
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Nov 21, 2005 19:43:55 GMT
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Carb Icing - is this whilst driving, or first thing in the morning? My 45 DCOE didn't have a choke (well it did, but I didn't want to drill another hole for the cable), so I put in two pieces of ducting from the back of the rad to the webber box - never had any probs! .......is there a heat shield? No Its proper Carb icing while driving, worse on Part throttle when the venturi effect is greater. It has a heat shield on the Exhaust manifold to shroud the air into a hose. This then connects up to the Airbox inlet Via a flap valve (Hot air or cold air feed), the hose is there but not in the best of health. I`ll replace that tonight. Might try an inverse heat sheild as well, IE try and keep the convected heat from the Exhaust manifold in the vicinity of the carb. Carb has the standard Rubber flexy spacer between it and the manifold, could loose that I suppose so the heat of the manifold transfers up.... Oh and the Manifold "Hedgehog" is fitted and working with Ignition on Check the flap valve is working correctly - if the ducting is there and it still ices up it sounds like the valve is stuck in the "cold air" position. A really easy mod is to drill a hole in the side of the air filter box in a position where you can jam the flap to only let hot air from the ducting into the airbox.
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Nov 21, 2005 20:22:13 GMT
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my dcoe 40 was icing up all this week. and when i woke up this morning to be greeted by dense dense dense fog, i knew today was going to be, errrm, 'fun' driving to college.
tehre are several ways ive read about to sort it.
1. get some ducting to the outlet manifold and make sure its the only place you are drawing air from.
2. sikolene pro fst is a fuel additive that lowered the freezing point of the petrol (and also raises the octane by a few points) and this is used on bikes, bit expensive at £8 to treat 50 litres
3. use higher octane fuel, as this also has a lower freezing point, only works a bit (from my experience) or it might be an old wives tale.
4. buy a fuel filter warmer or a nitrous oxide warmer (or simialr, they have quite a few applications) and its basically a piece of material that you plug into a 12v feed, and then wrap it round the carb and this (in theory) stops it.
thats all ive read about so far. i think I'm going to start with the manifold air ducting, as 1. its free, and 2. its what manufacturers use as there method.
but failing that, ill go buy a warming jacket for the carb and a carb tempreture gauge for the carb
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Kris
Posted a lot
Posts: 1,631
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Nov 21, 2005 21:38:54 GMT
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My buddy has had icing problems for the last couple of days with his DTML equipped Audi Coupe as well, I think he's going to try and rig up a heat shield too. On a side note, My G/F's Seicento's heater is rubbish in this weather, the engine doesn`t get upto temperature at all and the heater only gets luke warm, time for some tin foil on the rad black cab style
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Last Edit: Nov 21, 2005 21:39:39 GMT by Kris
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Nov 21, 2005 21:44:21 GMT
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Hmm my wife's Sei (which I'm driving at the moment) has a FANTASTIC heater. Get really warm nice and quick.
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my escort, since i changed the stat has got an awesome heater, and its stopped melting fuses (touchwood) aswell, so i can have it on full pelt and it doesnt melt the fuse! (wudent be too bad, cept the same fuse controls the indicators and brake lights ;D ;D )
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Update: Well the Golf now has a superb heater, after doing the matrix the other week, but the icing this morning was horrendous It makes no difference whether its 95 or 97ron unleaded, the only one I havent tried is Optimax, which was always the cure for it with the bikes. I bought some new Hot air Ducting (Shiny silver) and some new Vac hosing, so that will be tonights fun and games If that doesnt work then its time to get creative with heat sheilds and some copper pipe tee`d into the heater return...... to make a little radiator for the carb ;D... What it really needs is the rubber/phenolic adaptor remaking in Aluminium, to allow the heat from the manifold to conduct up into the carb body
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On a side note, My G/F's Seicento's heater is rubbish in this weather, the engine doesn`t get upto temperature at all and the heater only gets luke warm, time for some tin foil on the rad black cab style That sounds like a dodgy stat sticking open......
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