1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

Air at schrader valve problem

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  #31  
Old 03-18-2019, 06:09 PM
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Originally Posted by Chris754
All of those places are dry. However where the fuel goes into the injector is wet, and the bottom steel lines that come off the injector are wet with diesel. Looks like it is leaking, and has leaked to the back of the engine and created a little pool of diesel fuel. (Its the black thing in the picture). The truck also does not like to shut off when I turn the key off, it just stays running. That is why I am starting to think its Injector pump problem. This trucks pump has most likely never been replaced. I do not know how many times the odometer has rolled over, but the pump that is in there looks pretty dirty.

I have fuel right away at the schrader valve as soon as start cranking on the engine, which leads me to believe I have good pressure from the pump the way it comes shooting out of there. But the truck just will not start. It is getting fuel obviously, but it will not fire with out that ether.

When the engine is all warmed up and I shut the truck off, I can start it again with ease, but when I start it, it will blow white smoke out of the exhaust.

Again if the age or the mileage of the Injectors is unknown replace them IP pumps out last injectors...... Injectors should be done every 100K or so miles.
If you have leaks on the I/P pump time to replace it. In have no Idea what you mean by "the black thing in the picture".. And the injectors have no bottom steel line just one in to the top of the injector. Or are you referring to the lines off the Injection pump?
And if you are getting white smoke on start up it has already been said that it points to an injector issue regardless of what the IP is doing...

Do NOT put on a new IP with worn injectors. Do the injectors then the IP if you want. but NOT the other way around or when you install new injectors you have to re-time the ignition.
 
  #32  
Old 03-18-2019, 06:16 PM
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Yes I am referring to the lines that come off of the pump.
 
  #33  
Old 03-18-2019, 06:37 PM
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Originally Posted by Chris754
Yes I am referring to the lines that come off of the pump.
If they are leaking then you definitely will have hard start issues as it will allow the lines to evacuate of fuel especially with injectors that have some miles on them.
Try loosening the lines then re-tightening them.
 
  #34  
Old 03-18-2019, 07:59 PM
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If tightening them does not stop the leaking, like I mentioned before, you may have to take the line completely off and carefully inspect it for cracks. If you do find them to be cracked, I bet you have some clamps missing on the lines.
 
  #35  
Old 03-18-2019, 11:31 PM
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Leaking fuel lines on the IP will definitely give you all kinds of problems. You say there is a fuel leak at the IP. If it's not at the fuel lines in and out then you probably have a leak in the IP and replacement is probably needed. Do you know how many miles on the IP?

BB2
 
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