obsesscort
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Fuel supply to rebuilt engine
Hey guys, Sorry for bombarding with questions. What is the plan of attack if i have the engine all linked up and turning over at the turn of the key, but theres no fuel coming through to my filter and then carb... Does this system require priming? Sender is all wired up.... I've taken the hose apart at different sections to tests for flow before and after cranking... nothing.... I'm stumped! Any suggestions?
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Matt75
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Re:Fuel supply to rebuilt engine
2012/09/12 08:34:20
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☄ Helpful
Make sure the fuel lines are hooked up the right way to the pump. Sounds like it may be the pump. Disconnect the fuel line from the bottom of the pump and suck it to see if the hose is blocked. Use a mint afterwards. You could always fill a container with fuel and then put a hose from the pump into that. This wil tell you if the pump is knackered or not. Cheers Matt
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Mickos321
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Re:Fuel supply to rebuilt engine
2012/09/12 14:24:50
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☄ Helpful
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obsesscort
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Re:Fuel supply to rebuilt engine
2012/09/12 17:12:50
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hey mickos, i have studied that thread and it is indeed very helpful. The pushrod was put back in when i assembled it, which i verified earlier when i switched my pump upside down to check if i had the correct nozzle to fuel tank/carby... the main thing is i'm not getting any flow past the pump, i can't suck fuel through it either (not sure whether this is because of the pushrod not engaging when the motor is off) to prime the carby pipe either. I've tested fuel flow from the tank, i've set up a makeshift tank out of a litre bottle under the fuel pump which has the feed hose from the pump going into it, but still nothing. I've also tried priming the carby hose with fuel and then trying to start it (eliminating the fuel pump in the sequence) but the carby isn't doing anything.... The carby is off a ford falcon, perhaps this is the issue.... STUMPED! 
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Matt75
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Re:Fuel supply to rebuilt engine
2012/09/12 18:41:57
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You won't be able to suck through the pump due to the design. Have you tried sucking on the direct fuel line to the tank? Also, have you got the fuel pump spacer between the pump and block too? You could try pouring fuel down the carby throats to get it stated? Post some pics of your setup as a picture tell a thousand words. Matt
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obsesscort
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Re:Fuel supply to rebuilt engine
2012/09/12 19:25:57
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Yeah mate the fuel line direct to tank is not blocked, mouthfull of fuel follwed by a mouthful of mints as per your recommendations. Spacer is in, pushrod is in. Pouring fuel down the throats - how much are we talking? A couple of lid fulls? Here are some pics. Don't suppose you know what the connections are circled in red on figure 1? Fig 1 fig 2 fig 3 Sorry about the quality.... like my fuel tank? you can pick them up for free although they only have a capacity of 1.5L
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Matt75
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Re:Fuel supply to rebuilt engine
2012/09/12 19:53:41
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Don't know what carby that is. What is it? Not sure on the outlets circles but one will be a fuel return / overflow pipe I am pretty sure. Sounds like your pump is rooted. What's the history on the engine? Was it working? Just pour a splash down the carby. Maybe a cap full and see how you go. Don't go nuts. Check you are getting power to the spark plugs first by touching one of the park plug leads to something metal and crank engine. If you get a spark than all is good. Matt
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Matt75
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Re:Fuel supply to rebuilt engine
2012/09/12 20:00:28
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If it's anything like a 32/36 weber the outlets will be the over flow and the other a vaccuum takeoff back into the deceleration valve on the intake manifold. Matt
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obsesscort
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Re:Fuel supply to rebuilt engine
2012/09/12 20:34:23
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Cheers matt. Its a 34ADM off a ford falcon. Bought the motor with it on. Hadn't seen it working. Engine has been completely reconditioned. I'll give that a go hey. cheers
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spigot
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Re:Fuel supply to rebuilt engine
2012/09/13 19:53:18
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The big one will be a bowl that goes to the charcoal cannister, the other will be the anti stall diaphragm
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rallyrs
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Re:Fuel supply to rebuilt engine
2012/09/13 21:08:28
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like matt suggests, a couple of coke bottle lids down the carby may help . Likely the fuel pump may not want to prime up at starter revs. Whats the steel can between the hose and the carby, connector or inline filter ? If it tries to fire on the coke lids and pump still want prime, you could reverse engineer that hi-tek fuel tank and gravity feed it into the carby inlet hose. This should fill the fuel bowl up. To confirm fuel in the bow, whilst 'NOT' crankng over the motor (you could loose more than you eyebrows if it backfires), look down the primary throat (RHS throat in above picture) and pump the throttle linkage, you should see a jet of fuel squirted into primary throat or see a mist rise, confirming fuel is in the bowl. It should start and run for a little while with the fuel bowl full. Reconnect the pump line and give it a go. You could also run it off gravity feed, but remember to put the line from the pump into a container in case it comes good. Another trick is to put your airhose blower into the tank plugged by a rag to add a bit of positive pressure to help the pump prime. your not aiming at a perfect seal with the rag (dont want 100psi pushing into your pump) just a bit of pressure to help the fuel upto the pump. If you think youve flooded it by adding too much full, just hold it at full throttle whilst cranking to flush the extra fuel out.
mk2 2dr club car. pinto, stage 1 valves, rl31 cam, gsxr 600 tb running MS2 extra. :-)))
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obsesscort
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Re:Fuel supply to rebuilt engine
2012/09/14 00:03:10
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Hey thanks spigot - where would i connect the anti stall diaphragm hose too? rallyrs - thank for the indepth post, i bought a new fuel pump today and will give that a go. will definately give your suggestions a try if this fails! thanks heaps mate
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