fuel pump help
Thread Starter
|
Senior User
Joined: Jan 2016
Posts: 483
Likes: 2
From: gowen mi
fuel pump help
68 f100 wouldn't start, so i checked spark, great spark, then checked fuel supply, wasn't getting fuel, took off fuel hose going into fuel pump, put tank end hose in jar of fuel and didn't pull fuel, would like experiences dealing with the fuel pumps, can anyone educate me on fuel pump problems, how often do they fail? thanks abunch
dave
michigan
dave
michigan
FTE Legend
Joined: Nov 2015
Posts: 30,828
Likes: 4,094
From: Angier, NC
How old is the pump?
Has it been sitting a long time before this happened?
Check the oil level and smell to see if fuel has made it into the oil pan.
When they go bad they show it a few different ways. Oil level will go up and the oil smell of gas. They can leak fuel out a weep hole so you see it on the ground or smell it and start looking for a leak.
The last is they just stop pumping. The diaphragm can get a hole in it or the check valves get crap in them and hold them open so it will not pump.
I asked about sitting, todays gas will eat the older rubber diaphragms and if they sit for a bit they dry out, crack and don't pump.
I had a hard time getting fuel from a 2 gal jug on the fender up to the carb, this was after the truck sat for 2+ years as I rebuild her. When she did pump gas I found the carb bad and could not run it long.
Just the short time running I went thru the 2 gal of fuel and I think I should not have. Because it sat so long, had a hard time pumping fuel and the gas going fast I am replacing the pump (I should be out doing that now!)
My 81 300 six pump was under $25 at Auto Zone
Dave ----
Has it been sitting a long time before this happened?
Check the oil level and smell to see if fuel has made it into the oil pan.
When they go bad they show it a few different ways. Oil level will go up and the oil smell of gas. They can leak fuel out a weep hole so you see it on the ground or smell it and start looking for a leak.
The last is they just stop pumping. The diaphragm can get a hole in it or the check valves get crap in them and hold them open so it will not pump.
I asked about sitting, todays gas will eat the older rubber diaphragms and if they sit for a bit they dry out, crack and don't pump.
I had a hard time getting fuel from a 2 gal jug on the fender up to the carb, this was after the truck sat for 2+ years as I rebuild her. When she did pump gas I found the carb bad and could not run it long.
Just the short time running I went thru the 2 gal of fuel and I think I should not have. Because it sat so long, had a hard time pumping fuel and the gas going fast I am replacing the pump (I should be out doing that now!)
My 81 300 six pump was under $25 at Auto Zone
Dave ----
Thread Starter
|
Senior User
Joined: Jan 2016
Posts: 483
Likes: 2
From: gowen mi
not sure how old pump is, probably original
has been sitting since last fall, garage all the sudden has been smelling really like gas but nothing on floor, going to check of oil smells like fuel
at this point what would you tackle first? great education on the fuel pump, thanks\
dave
michigan
has been sitting since last fall, garage all the sudden has been smelling really like gas but nothing on floor, going to check of oil smells like fuel
at this point what would you tackle first? great education on the fuel pump, thanks\
dave
michigan
Laughing Gas
Joined: Mar 2010
Posts: 1,028
Likes: 5
From: San Francisco East Bay
68 f100 wouldn't start, so i checked spark, great spark, then checked fuel supply, wasn't getting fuel, took off fuel hose going into fuel pump, put tank end hose in jar of fuel and didn't pull fuel, would like experiences dealing with the fuel pumps, can anyone educate me on fuel pump problems, how often do they fail? thanks abunch
dave
michigan
dave
michigan
FTE Legend
Joined: Nov 2015
Posts: 30,828
Likes: 4,094
From: Angier, NC
It would be a good idea to let us know which engine you're dealing with. Some fuel pumps are easier to deal with than others, even when the pumps are identical. If you're dealing with a 360/390, you may need to remove the oil filter, IOT have access to the fuel pump's mounting bolts.
I do not care what brand pump I got as long as it works. Because I have an Auto Zone 2 miles from my house, all others are about 10 miles, I use them and what ever they can get.
I do look the parts up on line first to see price and if in stock or not. If I need the part ASAP then I may find an AZ store that has it but I don't need the truck so I can wait.
Dave - - - -
Thread Starter
|
Senior User
Joined: Jan 2016
Posts: 483
Likes: 2
From: gowen mi
lol, i should know better, i have a 68 with 360 and a 71 with straight six, the one i'm having trouble with has the 360, sorry
Trending Topics
Laughing Gas
Joined: Mar 2010
Posts: 1,028
Likes: 5
From: San Francisco East Bay
Putting the new one in can be frustrating, since the cam follower may need to be compressed before the mounting bolts will line up. If you run into this problem, consider removing all of your spark plugs and manually rotating the crankshaft with a socket & breaker bar. It will be easier to install the fuel pump if the follower is resting on the low part of the cam.
As I posted earlier, you will probably want to remove the oil filter, in order to gain access to one of the fuel pump's mounting bolts.
Safety precautions... protect your eyes... be careful about getting oil and/or fuel in your face.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Ford Super Duty: 5 Things Owners LOVE, 5 Things They LOATHE!
Joe Kucinski
Every 2026 Ford Truck Engine RANKED from WORST to FIRST!
Michael S. Palmer
The Best F-150 Deal of Every Trim Level (XL through Raptor)
Joe Kucinski
Laughing Gas
Joined: Mar 2002
Posts: 930
Likes: 334
From: Newton Illinois
I went through 2 Napa fuel pumps on my 390 that lasted about 1,000 miles each before they started pumping oil out the vent hole. I bought a edelbrock pump that has been on for 10,000 and good so far
Thread
Thread Starter
Forum
Replies
Last Post
clinkfield
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
6
Aug 23, 2018 07:40 PM
olddawg
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
3
Jun 23, 2002 09:18 PM