89 7.3 won't idle
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Joined: Dec 2004
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89 7.3 won't idle
Hi all I am new here, so here is a little background:
89 F350 Dually 7.3 diesel 170,000 miles.
The truck will not idle, will start ok, but won't idle, also mileage has gone out the window
any help would be greatly appreciated.
89 F350 Dually 7.3 diesel 170,000 miles.
The truck will not idle, will start ok, but won't idle, also mileage has gone out the window
any help would be greatly appreciated.
Posting Guru
Joined: May 2004
Posts: 1,343
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From: Higginsville, MO
How long has it been since your injection pump was rebuilt or replaced? Do you change your fuel filter often? Is there an air leak around the fuel filter? If your fuel filter is seeping air it will cause terrible hesitation and rough idling no to mention a gob of white smoke out the tailpipe and will also diminish your fuel mileage. Had this happen on a 1993 F-250 once when my not so bright boss put both rubber gasket rings on the top of the filter instead of putting one on the bottom for the water separator. Didn't take me long to figure out the problem but the truck barely ran and was billowing white smoke from the tailpipe. Check the fuel filter and if it has been more than 80,000-90,000 miles you may want to have your injector pump rebuilt again. Often times they wear quickly and need rebuilt. Also check for a cracked injector line or a bad injector. Hope some of this helps!
FTE Leadership Emeritus
Joined: Jan 2003
Posts: 161,999
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From: 3rd Rock
Originally Posted by Bronco419
Hi all I am new here, so here is a little background:
89 F350 Dually 7.3 diesel 170,000 miles.
The truck will not idle, will start ok, but won't idle, also mileage has gone out the window
any help would be greatly appreciated.
89 F350 Dually 7.3 diesel 170,000 miles.
The truck will not idle, will start ok, but won't idle, also mileage has gone out the window
any help would be greatly appreciated.
Enjoy FTE
Elder User
Joined: Aug 2003
Posts: 692
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From: newfoundland canada
On your injection pump linkage there is a screw with a spring around it,(basiclly its just a stop for the linkage)that screw adjusts the idle.Check it to see if its backed off,or just turn it a couple of turns and see if it will then idle,if it does wait for the engine to reach operating temps and set your idle with that screw to 650-700rpm's.How much of a drop did your fuel milage take?You can expect it to drop a couple of mpg's when the stations start selling their winter fuel.
Last edited by pnose; Dec 23, 2004 at 11:59 AM.
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