Club126UK
Fiat 126 Chat => Fiat 126 Mechanical Problem Solving => Topic started by: ciaoflyer on January 28, 2012, 10:55:34 AM
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Does the pump need priming once fitted, suck it through, or should it just start by itself when the engine is cranked?
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The pumps are self priming but it will take a while for the petrol to come through, Electric is the way to go ;D It will also save the starter motor and the endless cranking :thumbup
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i have to admit that with an electric pump it will start straight away like pete says the advantages do show on start up.
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Do you guys fit safety relays? If so, what kind?
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I wired mine through a relay supplied through the ignition switch, But on my things to do list is fit a fuel pump inertia switch ;D They can be picked up cheaply on Bday :P
http://www.smartracingproducts.com/pdfdocs/935100_fuelshutoff.pdf
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Any tips on where to get electric fuel pump?
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As long as your 126 isn't putting out more than 105 BHP this should do the trick :P
http://www.ebay.co.uk/itm/4PSI-ELECTRIC-FUEL-PUMP-4-CLASSIC-CARS-105BHP-6MM-TAILS-/400271223765?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item5d32062bd5
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Cool, My manual pump has three pipes this has only two, how to I fit it?
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You just block the return fuel pipe off.
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You don't need the return then?
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No you don't. The pump automatically stops running when the float chamber is full. If you had the return it would keep on pumping straight to the return rather I think.
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I wired mine through a relay supplied through the ignition switch, But on my things to do list is fit a fuel pump inertia switch ;D They can be picked up cheaply on Bday :P
http://www.smartracingproducts.com/pdfdocs/935100_fuelshutoff.pdf
That's not a bad idea. I ordered the 5 second priming & ignition sensing VW relay because that's what I've been using in electric pump aircooled VW conversions. I hope that the ignition pulse in the twin will also make it work correctly for the Facet that's going in the Fiat. :D
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Will this from 126FAN fit the BIS?
http://www.126fan.sk/eshop/index.php?main_page=product_info&cPath=10_22&products_id=779
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What about this as it's cheap......
http://www.wanapart.co.uk/Engine-Management-Fuel-Components-FIAT-126%3Cbr%3E1972/9-2000/9-700%3Cbr%3EPetrol%3Cbr%3ESpecial-Design%3Cbr%3E19-Kw%3Cbr%3E26-HP%3Cbr%3E1987/9-1996/6/c51_20_2515120_2515242_2515247/p9675374/Fuel-Pump/product_info.html
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OK update, I have fitted and tested both fuel pumps I have an neither pump a drop of fuel, I have sucked fuel through the end of the pipe but still neither will pump a drop. I assume there is no special procedure to fit these, you just fit and it pumps.
Think I will order a new mech pump as it saves messing with electrical connections and the pump fitted has worked since 2006!
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It took ages to get any thing out of mine after changing the (mechanical) fuel pump, someone had fitted an electrical pump, in line with the leaky mechanical one, wired straight to the ignition (so it was continuously on) and had bolted it straight to the shell, sounded like a pneumatic drill!!
After replacing the mech pump and removing the electric pump I placed jump leads from my other car to the fiat and cranked it for days, eventually (sometime the following sunday I think) it pulled enough through to splutter in to life. :D
It would have been a bit quicker if it hadn't been drawing in air, triple check all of the pipe fittings, it will save time in the long run. Jubilee clips are crap, make sure you have proper fuel line clips (about 25p each)
tighten until you cannot twist the pipe.
Marc
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You can prime the Carb, I have a washing up liquid bottle with the base cut off, a piece of rubber pipe connected to the squirty end, Then connect the pipe to the carb and dribble some petrol through to fill the carb, with the carb full it should run a minute or two. Connect the pipe from the pump and start the engine, this should pull the fuel through assuming the pump isn't faulty.
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Sounds like if you try 3 pumps and nothing happens, it's not a pump problem.
Hoses in good order? checked they havnt split a bit near the tanks?
I have no doubt you can suck harder than a little fuel pump so sucking doesn't prove anything.
I know it's probably you want to keep it standard, which is nice, buy a spare starter :P
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Ordered a new pump from gerstle cos the other looked a bit too cheap and was not sure about the seller, have to wait and see!
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:D :D Fuel pump came this morning! Paid for it Tuesday 2 days from Germany great! Will fit tomorrow if it is not snowing too much!
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Pump fitted, cranked engine for aboutt 30 secs and it started ;D ;D but still stalling! :( :(
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I know a classic car owner who had the same problem as yours. I mentioned the issues you have been having with the engine stalling despite cleaning and replacing many parts. He reckons the fuel tank is full of dirt. He had his fuel tank flushed (chemical?) and drained. He was amazed with the amount of dirt that was in the tank. After flushing, the performance improved but the engine was still stalling, although not as often. He ended up replacing the fuel tank with a new one, and the problem appeared to have gone away.