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sparkydave
Jedi Knight
Offline
I think I'm getting close to just seeing if I can buy one of those I.V. bag hangers like they have at hospitals, bolting it to the fender, filling the bag with gas, and let gravity do the work! :madder: The funny thing is, the much-maligned Zenith-Stromberg carburetor is working fine - when it gets fuel.
OK. So the Facet pump wannabe that worked great for about a year gave up the ghost. This was to replace the mechanical pump that had a nasty habit of vapor locking. I know the old pump was vapor locking because I could take the cover off the pump and hear fuel boiling in it after it died.
Moss sent me a new pump as a warranty replacement. Now this pump actually says Facet on it, and came with much more detailed instructions. Seems I didn't mount the old pump the preferred way, which is a 45 degree angle. I mounted mine on the bulkhead (the bottom front of the trunk), but it was horizontal. The old pump had very scarce directions, but it worked and didn't mention a 45 degre angle. The mounting put it about 4 inches above the tank. New instructions say it has to be less than 12 inches. So far so good, but it took probably a minute's worth of clattering before it finally got quiet and started pumping gas. Maybe it just needed some priming first. So I got the engine running, and took it for a test drive. Not even halfway around the block, it's stumbling, losing power, then surging to life, then stumbling. Now this seems all too familiar. Limp back into the garage, and notice the pump is clattering like it's got air in it. Maybe that 45 degree mounting really is needed, to let any air trapped in the pump bubble out. So I take out one bolt, tilt it, and start it. The pump still clatters, and I can't hold the engine at 3000 RPM for more than 30 seconds before it just quits. I also noticed the pump goes from very quiet to loudly clattering at idle. So I finally get curious and unbolt the pump, letting it sit below the tank level. Now it stops clattering at idle, but the engine still can't do over 3000 RPM for any length of time.
Now I'm really perplexed. The gas tank is clean, all the fuel lines were replaced 2 years ago, the little inline fuel filter I put before the carburetor is clean, but it acts like this new pump just can't deliver enough fuel. Not to mention it seems to be getting air pockets. I had cut the original fuel line near the tank fitting, and added a short length of hose to the pump, since the fuel line kit I bought didn't have the tank fitting. That fitting isn't loose, I can vouch for that. I pulled the outlet hose off the pump and found it shoots a healthy stream of fuel out. My next plan was to pull the hose off near the carburetor and see if it makes a healthy stream at that point. Following that, I might get the clear tubing and see if I'm getting bubbles in the tank line. If there are, then I wonder if the tank has an air leak inside of it.
Any other ideas? Is the 45 degree angle critical to running the pump? Oh, and it has about 2/3 of a tank right now if that's any help.
OK. So the Facet pump wannabe that worked great for about a year gave up the ghost. This was to replace the mechanical pump that had a nasty habit of vapor locking. I know the old pump was vapor locking because I could take the cover off the pump and hear fuel boiling in it after it died.
Moss sent me a new pump as a warranty replacement. Now this pump actually says Facet on it, and came with much more detailed instructions. Seems I didn't mount the old pump the preferred way, which is a 45 degree angle. I mounted mine on the bulkhead (the bottom front of the trunk), but it was horizontal. The old pump had very scarce directions, but it worked and didn't mention a 45 degre angle. The mounting put it about 4 inches above the tank. New instructions say it has to be less than 12 inches. So far so good, but it took probably a minute's worth of clattering before it finally got quiet and started pumping gas. Maybe it just needed some priming first. So I got the engine running, and took it for a test drive. Not even halfway around the block, it's stumbling, losing power, then surging to life, then stumbling. Now this seems all too familiar. Limp back into the garage, and notice the pump is clattering like it's got air in it. Maybe that 45 degree mounting really is needed, to let any air trapped in the pump bubble out. So I take out one bolt, tilt it, and start it. The pump still clatters, and I can't hold the engine at 3000 RPM for more than 30 seconds before it just quits. I also noticed the pump goes from very quiet to loudly clattering at idle. So I finally get curious and unbolt the pump, letting it sit below the tank level. Now it stops clattering at idle, but the engine still can't do over 3000 RPM for any length of time.
Now I'm really perplexed. The gas tank is clean, all the fuel lines were replaced 2 years ago, the little inline fuel filter I put before the carburetor is clean, but it acts like this new pump just can't deliver enough fuel. Not to mention it seems to be getting air pockets. I had cut the original fuel line near the tank fitting, and added a short length of hose to the pump, since the fuel line kit I bought didn't have the tank fitting. That fitting isn't loose, I can vouch for that. I pulled the outlet hose off the pump and found it shoots a healthy stream of fuel out. My next plan was to pull the hose off near the carburetor and see if it makes a healthy stream at that point. Following that, I might get the clear tubing and see if I'm getting bubbles in the tank line. If there are, then I wonder if the tank has an air leak inside of it.
Any other ideas? Is the 45 degree angle critical to running the pump? Oh, and it has about 2/3 of a tank right now if that's any help.
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