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fuel problem?

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Old Jun 16, 2007 | 10:35 PM
  #1  
wentworth's Avatar
wentworth
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fuel problem?

I was wondering the trouble spots for losing pressure in fuel line when turned off. Any help would be appreciated.

94 250 7.3 idi
 
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Old Jun 17, 2007 | 12:02 AM
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PLC7.3
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What is your problem......

Our diesel fuel system does not retain fuel pressure......it is an open circuit back to the tank(s) It is a closed loop as far as any air intrusion.....there should be no air holes/leaks or fuel drain off will occur. There would be hard starts or starts with stalling and major cranking required to re prime the IP if there is drain off.
 
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Old Jun 17, 2007 | 12:52 PM
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Dave Sponaugle
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wentworth,
Welcome to FTE and the IDI diesel forum.

As PLC7.3 stated, the return lines do not let any pressure remain in the fuel lines when the engine is not running.
 
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Old Jun 17, 2007 | 06:24 PM
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new to idi

Since I'm new to idi, and not a mechanic by any means, I'll just tell ya'll my problem.
When I start the truck after it's been sitting for several hours, it takes 15-20 secs. to fire up. If it's only been an hour or so it starts perfectly.
So, if there are any opinions I'd take 'em.

94 250 7.3 idi stock
 
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Old Jun 17, 2007 | 06:51 PM
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Dave Sponaugle
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You have air intrusion.
Replace the return lines and the O rings under the return line tees.
 
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