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Question
does a 1977 f100 have a pump in the tank .I know its got one on the block but i was wondering if it had a helper pump in the tank .my truck acts up when i go up a steep hill. i have tried every thing i know to do to fix this new pump,pulled apart the carb and check for trash,sampled the gas for water or trash,blowed out the lines,.after it acts up it will not start back and run but for just a few seconds then it dies like it run out of gas.let it set a few days and it runs fine until you hit a hill.please help im going crazy.
If it has a mechanical pump on the block there should not be a pump in the tank. There is a nylon or brass mesh sock type filter on the fuel pick up in the tanks, right on the bottom. What your problem sounds like is that there is trash floating around in the tank getting caught in that filter and after a while pugging it. Then when the engine stops and the vacuum is released in the line between the filter and the pump the junk floats away and the car starts. The last one that I found like this had a collection of the cardboard tops from the top of Drygas cans.
Brad
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| Comment | thank you this is very helpful and i will be pulling my tank out to look in to this | ||
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Answers by Expert:
Brad Sears
Expertise
All automotive including antique and collectible. However if the car has been modified I can only answer in general terms and maybe get you pointed in the right direction.
Experience
Automotive tech instructor.
Syndicated auto columnist 1970's though the early 1990's.
Syndicated auto radio talk show, Ask Brad About cars, CBS Radio 70's through 90's
TV Show "Last Chance Garage" 1980's PBS-TV syndicated.
Auto instructor for the following companies:
Fram
Autolyte
Holly
Carter
AMF
Ford Motor
University Of Conn
Blue Hills Technical School
Sugar River Technical Center
Grew up in a family garage in Needham Mass and turned wrenches from the age of 14.
Publications
Manchester Union Leader, Nashua Telegraph, Motor Service Magazine, Yankee Magazine, Popular Mechanics (Saturday Mechanic early 80's), Los Angeles Times, New York Times, and lots more.
Education/Credentials
More than I care to remember.
Basically Franklin Technical Institute in Boston, Northeastern University, Fitchburg State Teachers College, Tufts University, and a lot of factory schools along the way.
Awards and Honors
Moto Award winner. And much more.
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