Kube
Super Moderator
Just for giggles I must ask... "how can a hose aid starting with ethanol fuel"?
Snake oil I tell ya, snake oil.
Fuel line check valve
- Thread starter Dick C
- Start date
Snake oil I tell ya, snake oil.
supereal
Well-known member
Too often "drain back" is mistaken for a worn fuel pump, as mentioned above, or the often discussed "vapor lock". If the carb is low on fuel in the bowl, look for a leaky power valve. If it happens after long drives, it can be evaporation due to the "heat soak" under the hood, or long periods of storage. I have an inline electric pump to replenish the carb so the cranking time is limited. Another way is to give the air cleaner a shot of starting fluid to get the engine going so it will pump the carb full. The "vapor pressure" of today's gas, particularly alcohol type, increases the speed of evaporation.
tubman
Well-known member
One last thing to check. I had the same problems on my car. After trying many things, I ended up truing the glass sediment bowl on my surface plate and wet-or-dry sandpaper. This and a cork sediment bowl gasket finally solved my cold start problem. There must have been some slight imperfection on the sediment bowl that caused a slight leak. After 2 years of no problems, I removed the electricv fuel pump I had installed to "cure" my problem, and I haven't looked back. For some inexplicable reason, a neoprene gasket doesn't work as well as a cork one on the sediment bowl.
The first thing I would do is check for debris in the sediment bowl, it can prevent the input valve from sealing properly. Next, check the vacuum on the fuel pump using a vacuum gauge. It will tell you if the input valve is leaking or the fuel pump is not working properly. If the pump is not working properly, replace it or rebuild it with new linkage, diaphragm and gaskets.
Excerpt form V-8 Times article on fuel pumps:
[FONT="]If you are having a problem with priming the fuel pump, hook a vacuum gauge to the input of the fuel pump and crank the engine. The vacuum gauge reading should rise to 10 inches in 18 seconds. Stop cranking the engine and watch the needle on the gauge. It should take at least one minute to reach 0. In order of probability causes of failure in this area are top cover or sediment bowl gasket leaks, input valve not working or defective diaphragm. [/FONT]
Excerpt form V-8 Times article on fuel pumps:
[FONT="]If you are having a problem with priming the fuel pump, hook a vacuum gauge to the input of the fuel pump and crank the engine. The vacuum gauge reading should rise to 10 inches in 18 seconds. Stop cranking the engine and watch the needle on the gauge. It should take at least one minute to reach 0. In order of probability causes of failure in this area are top cover or sediment bowl gasket leaks, input valve not working or defective diaphragm. [/FONT]