Fuel issue if someone could help!
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Freshman User
Joined: Oct 2015
Posts: 44
Likes: 4
Fuel issue if someone could help!
69 Ford F100 runs fine for 10mins. Starts up. Has a full tank of gas. Then dies as if it's out of gas. I had removed the secondary tank long ago and got rid of the fuel line. I tried adjusting the aux tank switch both ways and truck still won't start. Then after about 2hrs the truck starts up fine. Any clue ?
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
69 Ford F100 runs fine for 10mins. Starts up. Has a full tank of gas. Then dies as if it's out of gas. I had removed the secondary tank long ago and got rid of the fuel line. I tried adjusting the aux tank switch both ways and truck still won't start. Then after about 2hrs the truck starts up fine. Any clue ?
Some people are unaware, so they install an in-line fuel filter. Meanwhile the paper filter is getting more clogged up every day.
Lead Driver
Joined: Apr 2011
Posts: 6,399
Likes: 40
From: El Dorado, Arkansas
Do you still have a points ignition? If so, put a timing light on it, start the engine from a cold start and just observe the flashes from the timing light as the engine gets up to operating temperature.
If the condenser is bad, you'll notice the flashes from the timing light becoming erratic as the engine warms up. If this is the case, it will tell you you have an ignition problem (bad condenser) and not a fuel problem. --I went through the same symptoms a couple of summers ago and I too (initially) thought it was a fuel problem. It turned out to be a bad condenser.
If the condenser is bad, you'll notice the flashes from the timing light becoming erratic as the engine warms up. If this is the case, it will tell you you have an ignition problem (bad condenser) and not a fuel problem. --I went through the same symptoms a couple of summers ago and I too (initially) thought it was a fuel problem. It turned out to be a bad condenser.
Thread Starter
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Freshman User
Joined: Oct 2015
Posts: 44
Likes: 4
Do you still have a points ignition? If so, put a timing light on it, start the engine from a cold start and just observe the flashes from the timing light as the engine gets up to operating temperature.
If the condenser is bad, you'll notice the flashes from the timing light becoming erratic as the engine warms up. If this is the case, it will tell you you have an ignition problem (bad condenser) and not a fuel problem. --I went through the same symptoms a couple of summers ago and I too (initially) thought it was a fuel problem. It turned out to be a bad condenser.
If the condenser is bad, you'll notice the flashes from the timing light becoming erratic as the engine warms up. If this is the case, it will tell you you have an ignition problem (bad condenser) and not a fuel problem. --I went through the same symptoms a couple of summers ago and I too (initially) thought it was a fuel problem. It turned out to be a bad condenser.
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I did just replace my gas cap about a month ago....
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Lead Driver
Joined: Aug 2003
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From: **** hole San Jose ca.
check all rubber gas lines at pump an the main lower tank switching valve for any cracked line that can suck air or leak gas..
What have you done to solve the problem??
How long has this been happing ?
Orich
What have you done to solve the problem??
How long has this been happing ?
Orich
Lead Driver
Joined: Jan 2003
Posts: 9,893
Likes: 12
From: Ohio
They say it needs a full 12volts and the coil wire has a resistor wire that cuts the running voltage to about 9v. The new electronic conversion do not like low voltage. I just know I've heard that common story of failure and that is what everyone says is the issue.