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Old 02-11-2010, 09:03 AM  
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Default No fuel at carburetor

Hello, I've been trying to get the 1.3 engine on my 88 Samurai running. I had some trouble with the timing but I was able to get it running at 20 degrees BTDC instead of 10 degrees. Either Ack or Baractus mentioned that was caused by the timing belt having slipped. After running it for 5 minutes or so it just cut off and wont start again.

The engine turns and I have spark at the spark plugs but no fuel at the carburetor. The fuel pump is not leaking oil. I checked the fuses and they're good to go. I did a visual check of the fuel lines and they looked good.

I did notice a sort of hissing sound when I would push the clutch in while the engine was running for those glorious five minutes

Is there a way to check if the fuel pump is working without a multimeter? On the forums someone mentioned cranking the engine manually and fuel should shoot out the line attached to the carb. I took that to mean cranking the crankshaft manually with a 17mm, I did and no fuel came out of the line.
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Old 02-11-2010, 11:47 AM  
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you can't check the fuel pump with a multimeter because it's a mechanical pump, not electric. The pump has a little arm on it the is actuated by the cam. If your belt has completely snapped, the cam will no longer turn and the pump will no longer pump fuel. When you noticed the belt had slipped a notch, that would be the time to replace it. They usually don't last much past that.
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Old 02-11-2010, 12:08 PM  
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Awesome, I'll start reading up on changing the belt then. THX for the help
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Old 02-13-2010, 08:27 AM  
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I took the top part of the timing belt cover off to see if the belt snapped off and it hasn't. The belt looks quite new actually, I had some work done on the engine recently and it seems they changed the belt. I'm about to chuck this sucker into a river...
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Old 02-13-2010, 09:52 AM  
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No fuel at the carburetor or out of the fuel pump could mean a clogged fuel filter - which is located in the right rear wheel well area (fuel fill side...)

I hope that this helps!
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Old 02-13-2010, 10:49 AM  
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Changed the fuel filter a few minutes ago and its not drawing fuel into the filter. Could the timing belt be the culprit even though it didn't snap?
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Old 02-13-2010, 10:57 AM  
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It's possible that whoever replaced the timing belt did not set the tension properly or they may not have secured the tensioner and it may have loosened up. They belt may be in-tact, but is just slipping on the pulley. try turning the crank pully by hand with the valve cover off. If the cam turns when you turn the crank then the timing belt is probably fine. If the cam doesn't turn when you turn the crank then the belt is either slipping or the cam isn't connected to the pulley anymore.

Last edited by Baratacus; 02-13-2010 at 11:01 AM.
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Old 02-13-2010, 11:28 AM  
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Thanks for the advice, I checked and the cam does move when I turn the crankshaft manually.

edit: trying to chase this down. if the timing belt did slip, would it stop the fuel pump from working by having messed up the timing? or does the pump move gas regardless of the timing as long as the belt is turning?

Last edited by benq889; 02-13-2010 at 11:47 AM.
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Old 02-13-2010, 11:46 AM  
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The fuel pump could have a broken arm that drives it. Pull the pump and check it. Blow back through the fuel line to the tank to see if it is blocked somewhere. Make sure there is gas in the tank. Also check to see if the pump diaphram still draws vaccume. It could have just failed and not leaking oil yet.
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Old 02-13-2010, 12:26 PM  
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Default took fuel pump out

Took the fuel pump out, the half moon arm on the pump barely moves, maybe I'm not applying enough pressure. I did notice that the rod coming out of the engine block (which I assume moves the half moon on the pump), does not move when I move the crank shaft manually. I've attached a pic of the rod I'm talking about.


Last edited by benq889; 02-13-2010 at 12:27 PM. Reason: spelling
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