Fuel analysis/detective work
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Senior User
Joined: May 2016
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From: West Tennessee
Fuel analysis/detective work
I decided to take the '66 out for a trial run to work out any kinks before I take it to the paint shop. Well, it is a good thing that I did because it quit on me about a mile from the shop (country road). To make a long story a little shorter, after a hike back to the shop to get a can of gas a small bottle (for pouring in the carb). The gas tank had about 1 1/2 gallon of gas.I added abut 4 more gallons of gas and I poured gas in the carb and it would run long enough to burn the gas I poured in the carb but it would not continue to run, I called TBH and she came out and pulled RSH back to the shop. So, here is want I have done today:
* pulled top off of carb and float bowl dry.
* pulled gas line off of the carb turned it over the motor.....no gas
*pulled the gas line off the fuel pump and no gas runs out....here is where I stopped today at 6pm (I got hungry).
I am thinking the siphon pipe is clogged, so the fuel pump can not pump gas. Tomorrow I plan on taking the fuel line off the top of the gas tank and blow air down the siphon pipe to see if that lets gas flow again. If gas does start to flow again that will mean I will need to pull the tank and clean it out (again).
My question: Am I going about this the right way?
rsh
* pulled top off of carb and float bowl dry.
* pulled gas line off of the carb turned it over the motor.....no gas
*pulled the gas line off the fuel pump and no gas runs out....here is where I stopped today at 6pm (I got hungry).
I am thinking the siphon pipe is clogged, so the fuel pump can not pump gas. Tomorrow I plan on taking the fuel line off the top of the gas tank and blow air down the siphon pipe to see if that lets gas flow again. If gas does start to flow again that will mean I will need to pull the tank and clean it out (again).
My question: Am I going about this the right way?
rsh
Mountain Pass
Joined: Jul 2019
Posts: 126
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If the pickup sits or if "miracle tank sealer" has been put into the tank, you will have increasing buildup in the line. Occasionally enough will break loose to jam up the line until you apply sufficient suction or pressure to break it loose. Then fuel will flow until the next repeat. This results in an intermittent and frustrating fuel flow situation. The best solution for this is to boil out the tank and replace the lines. Other home-brew fixes can suffice, but this is the sure way to guarantee tank and line cleanliness.
In the future, put in fuel stabilizer and drive the truck more frequently, too.
In the future, put in fuel stabilizer and drive the truck more frequently, too.
Post Fiend
Joined: Apr 2002
Posts: 19,311
Likes: 97
From: Waterloo, Iowa
Pull the fuel sender and take a look inside the tank for general condition, rust and sludge. Sometimes the fuel pickup tube corrodes and gets pinholes too. No siphon action. If flow is obstructed can use shop air to blow back through the line into the tank, don't go crazy maybe 20 psi should be enough. There's an often overlooked short length of rubber fuel hose underneath the cab that would need replacing by now if it hasn't this century.
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Senior User
Joined: May 2016
Posts: 250
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From: West Tennessee
I removed the gas line on the top of the tank and blew compressed air down in the siphon tube. Now, I have fuel back and as is well. HOWEVER, I know that I will to to remove the tank and clean it again.
thanks for the comments.
rsh
thanks for the comments.
rsh
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