Someone please tell me what to do....
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Marc
- Moderator
- Posts: 23741
- Joined: Thu May 23, 2002 12:01 am
How do you know? Did you pull off the fuel inlet line and crank the starter to see if fuel spits out the hose?
If not, you might have a bad fuel pump, but much more likely is a clogged strainer in the bottom of the tank. Pull the inlet line off the pump and fuel should flow freely...if it doesn't, blow into the line until you feel/hear it bubbling in the tank and try again. The problem won't be solved permanently until you pull the tank and clean it. Personally I prefer an inline filter ouside of the tank to the factory strainer deal, that way any crud leaves the tank where a simple filter replacement gets rid of it rather than leaving it inside to come back and haunt you later.
If not, you might have a bad fuel pump, but much more likely is a clogged strainer in the bottom of the tank. Pull the inlet line off the pump and fuel should flow freely...if it doesn't, blow into the line until you feel/hear it bubbling in the tank and try again. The problem won't be solved permanently until you pull the tank and clean it. Personally I prefer an inline filter ouside of the tank to the factory strainer deal, that way any crud leaves the tank where a simple filter replacement gets rid of it rather than leaving it inside to come back and haunt you later.
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Bob Ingman
- Posts: 2869
- Joined: Mon Mar 19, 2001 12:01 am
Nick do the gravity test first by pulling the fuel line off the intake side of the pump. hold it down lower than the bottom of the tank and it should have a flow to the pump. If not blow back through it to get a bubbling in the tank. Then it should come flowing to the pump.
If it flows to the pump connect the line back on the pump intake side and pull the one from pump discharge side at the carb. Use an empty Pepsi can to stick the end into then go give a couple of cranks to the engine. Can should have gas in it. If not pump is not operating. If you have gas in the can then put hose back on carb and remove carb top to check float and see if the float is sticking and allowing no gas to enter carb. If you have gas in the float chamber then remove the valve in the bottom of the chamber and blow through it. If no air passes through then get a small wire and unplug it.
The idea is to trace the fuel from tank through the carb to find out where the obstruction or malfunction occurs. Systematicly front ot rear. Keep us posted. Bob Ingman
If it flows to the pump connect the line back on the pump intake side and pull the one from pump discharge side at the carb. Use an empty Pepsi can to stick the end into then go give a couple of cranks to the engine. Can should have gas in it. If not pump is not operating. If you have gas in the can then put hose back on carb and remove carb top to check float and see if the float is sticking and allowing no gas to enter carb. If you have gas in the float chamber then remove the valve in the bottom of the chamber and blow through it. If no air passes through then get a small wire and unplug it.
The idea is to trace the fuel from tank through the carb to find out where the obstruction or malfunction occurs. Systematicly front ot rear. Keep us posted. Bob Ingman
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alsehendo
- Posts: 1004
- Joined: Thu Nov 29, 2001 12:01 am
Don't mean to hyjack this post, but while your on carbs.
At what outside temp should the choke plate be closed?
I have to turn over the engine for nearly 10 to 20 seconds with it floorboarded to get it to start. If the weather is cold, <50F it pops right off. Can't remebber how you set Pic 34 choke. do you just loosen screws and spin it to tighten the spring.
I'm running a 132mm main jet, I llike the way it runs when the mix is bit rich. I use it almost exclusivly for in town driving.
At what outside temp should the choke plate be closed?
I have to turn over the engine for nearly 10 to 20 seconds with it floorboarded to get it to start. If the weather is cold, <50F it pops right off. Can't remebber how you set Pic 34 choke. do you just loosen screws and spin it to tighten the spring.
I'm running a 132mm main jet, I llike the way it runs when the mix is bit rich. I use it almost exclusivly for in town driving.
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alsehendo
- Posts: 1004
- Joined: Thu Nov 29, 2001 12:01 am
Could he have been getting positive crankcase pressure somehow and pumped oil in from the oil bath air cleaner. Is there even any oil left in the cleaner? Maybe someone can can comment further Anyway you can check this by rubbing your finger on the inside of tube were it attaches to the top of the carb. This would eventually plug up the whole carb. Spray some start fluid down the carb or dump in a little gas to see if at least it starts for a second or so.
I always vent my cases at the oil fill tube and use after market paper filters so I haven't run into this problem for many years. Wasn't there also a problem with the flapper thing on the oil bath coolers sticking and not allowing the case to vent or something like that.
Defiantly disconnect the inlate hose to the the carb and bump over the engine to see if you get any fuel out of the pump--disconnect the 12V running to the coil for safety reasons when you do this--terminal #15 opposite the green one going to the distributer.
I always vent my cases at the oil fill tube and use after market paper filters so I haven't run into this problem for many years. Wasn't there also a problem with the flapper thing on the oil bath coolers sticking and not allowing the case to vent or something like that.
Defiantly disconnect the inlate hose to the the carb and bump over the engine to see if you get any fuel out of the pump--disconnect the 12V running to the coil for safety reasons when you do this--terminal #15 opposite the green one going to the distributer.