losing power - Ford Powerstroke Diesel Forum

6.9L IDI Diesels Technical discussion of topics related to vehicles powered by the 6.9 Liter In-Direct Injection Navistar engines.

 
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post #1 of 4 Old 03-21-2010, 01:58 PM Thread Starter
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losing power

my 6.9 runs good but the other day i was driving it andat a certain rpm it chugs or misses on a few cylinders, then if you stomp on it it runs good, it seems to be at a certain rpm at certain times. some times its ok. it doesnt die it just struggles. what could it be?
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post #2 of 4 Old 03-22-2010, 08:12 AM Thread Starter
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bump bump!!
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post #3 of 4 Old 04-14-2010, 11:00 AM
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i have that same problem with my idi. it's something with the injection system that i haven't figured out yet
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post #4 of 4 Old 04-14-2010, 03:04 PM
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Hmm...sounds odd. First thing would be to replace the fuel filter, basic maintainance anyways. After that I would start looking at lift pump, return lines, and then lastly the IP.

-Justin-
1985 Ford F-250 with a 6.9 IDI/T-19 4speed 4x4
Paint, Eagle Alloys, Kelly Safari TSR's, ATS turbo, gauges

2004 Jetta TDI 5 speed
2004 2wd Excursion Limited 6.0. Testing how loyal I am to Ford
1997 Passat B4V TDI. 1 of 80 imported in 97. 50 MPG and a factory 25 gallon fuel tank!
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