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Old Aug 15, 2005 | 02:55 PM
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Hard to start after sitting
I will try to make this as short as I can. I have a 90 f150 with the 4.9. In the morning or after the truck sits I have to let the fuel pump run for almost a half hour before it will start. If I try to start it before the fuel pump turns off on its own it wont run. I replaced the back tank pump and it now just pushes the fuel to the front tank. I noticed there is no return line to the back tank. (great) So where should I start?
And thanks to everyone that helped with the cluck problem.
 
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Old Aug 15, 2005 | 10:17 PM
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Sounds like the tank switching solenoid is not shifting all of the way. There should be a return line that comes from the switching solenoid on the frame.
 
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Old Aug 16, 2005 | 07:44 AM
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I tried to find that switch but cant. Where can I find a picture of it?
 
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Old Aug 16, 2005 | 04:53 PM
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Is there a part hanging on the frame behind the high pressure fuel pump that has 6 lines going to it?
 
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Old Aug 17, 2005 | 09:06 AM
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This year truck dont have an external fuel pump. I followed the lines and I dont see any valve or anything that could be a valve.

Thanks

Originally Posted by LxMan1
Is there a part hanging on the frame behind the high pressure fuel pump that has 6 lines going to it?
 
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Old Aug 17, 2005 | 09:04 PM
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Ok, then it has check valves in each pump assembly. One tank may be pumping into the other. These are known to fail.
 
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Old Aug 18, 2005 | 08:55 AM
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So then my best bet is to change the front tankis pump also? Man that stinks.
Originally Posted by LxMan1
Ok, then it has check valves in each pump assembly. One tank may be pumping into the other. These are known to fail.
 
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Old Aug 21, 2005 | 02:27 PM
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It could be the only way repair it.
 
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Old Aug 22, 2005 | 07:35 AM
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Well that stinks. Does anyone have a photo of the valve?
 
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Old Aug 22, 2005 | 05:43 PM
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The check valves are inside the plastic housing. I've never broken one open to look at it.
 
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Old Aug 23, 2005 | 07:41 AM
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I know this may sound stupid but which plastic housing are you talking about? Pump housing?
Originally Posted by LxMan1
The check valves are inside the plastic housing. I've never broken one open to look at it.
 
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Old Aug 31, 2005 | 02:02 PM
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just a bump to see if anyone has figured this out yet.
 
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Old Aug 31, 2005 | 10:55 PM
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Yes, the pump housing. Sorry, I've been away from the PC longer than I wanted.
 
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