Ford 83-94 6.9 and 7.3L General Discussion of 83-94 6.9 and 7.3 Liter Ford Diesels

1986 6.9 problems

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Old 03-31-2014, 11:12 PM
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Default 1986 6.9 problems

86 f250 6.9. Not sure how many miles are on it but I've had it for about a year. Ive been having a rough idle. Sometimes it would die on me at stop signs but as long as i was over 1000rpms it ran fine even more power than usual. I have replace all the return lines and o rings and also i don't use my rear tank and ran new lines to bypass that switch on the frame and the old water separator. After i ran the new fuel lines it ran like a top intel the idle problems started. I have new injectors on the way. Any suggestions would be appreciated
 

Last edited by Olddiesel; 03-31-2014 at 11:14 PM.
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Old 04-01-2014, 05:03 PM
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Probably need to bump your idle up to 800-850 ... Run about 2 quarts of dextron ATF and run in down good long stretch of highway .... Should help a bit ... If not ... Proceed in replacing injectors ...
 
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Old 04-01-2014, 07:37 PM
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Thanks for the advice. Now i took it to work this morning it ran pretty good but on the way home i could barley make it up a hill. I was only going about 20mph floored no power it was just bogging out. Injection Pump?

---AutoMerged DoublePost---

How do i turn my idle up???
 

Last edited by Olddiesel; 04-01-2014 at 07:37 PM. Reason: Automerged Doublepost
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