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  #1  
Old 10-08-2007, 10:36 AM
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advice needed!

my '01 7.3 excursion started idling rough and lost all power. I was away from home at the time and my extended warranty made me go to a ford dealer. the dealer said the #8 inj was bad and fuel was leaking into the valley from either the fuel heater or thermastat faulting out. both were replaced. The truck runs fine now but has a rod knock sound that you can hear when idling. Not loud but noticable...every 3-5 seconds or so.

The truck idled for 15 minutues or so under the rough idle condition. would this have effected a rod? the service tech said the one bad injector effected the amount of fuel/oil pressure getting to that entire side of the motor. Am I being anal or should I be concerned?
Thanks,
Jeff
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Old 10-08-2007, 11:16 AM
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Welcome to Powerstroke.org

I can't help you with your problem.. but this will bump the thread up so that someone who can will be more likely to see it.
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Old 10-08-2007, 11:32 AM
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I have no clue either bud, but some Tech's are online -- so we'll bump this up again..

Welcome to the .org!
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Old 10-08-2007, 11:36 AM
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how long since they replaced the injector or did they replace the injector. low rpm knock is commonly an injector problem still.
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Old 10-08-2007, 11:40 AM
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Quote:
Originally Posted by jdeclue View Post
my '01 7.3 excursion started idling rough and lost all power. I was away from home at the time and my extended warranty made me go to a ford dealer. the dealer said the #8 inj was bad and fuel was leaking into the valley from either the fuel heater or thermastat faulting out. both were replaced. The truck runs fine now but has a rod knock sound that you can hear when idling. Not loud but noticable...every 3-5 seconds or so.

The truck idled for 15 minutues or so under the rough idle condition. would this have effected a rod? the service tech said the one bad injector effected the amount of fuel/oil pressure getting to that entire side of the motor. Am I being anal or should I be concerned?
Thanks,
Jeff

I've had that problem that sounded like a rod at idle but it was a broken motor mount.
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  #6  
Old 10-08-2007, 11:46 AM
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Quote:
Originally Posted by MrJohnWayne View Post
how long since they replaced the injector or did they replace the injector. low rpm knock is commonly an injector problem still.
They replaced the injector on Friday afternoon and the knock was noticed friday evening. I picked it up right at 6pm. couldn't take it back to them since they were closed.
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  #7  
Old 10-08-2007, 11:47 AM
Thats Mr. Oil Leak.....

 

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It could also be air in the system. not sure how long it'll take for the air to work out (i've heard 200 +/- miles) but that could be the problem.
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Old 10-08-2007, 11:50 AM
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Over the weekend I noticed I was a quart or two low on oil. I thought this might be causing me to hear the knock so I changed the oil. Is oil lost when an injector is changed?
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  #9  
Old 10-08-2007, 11:52 AM
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yes oil is lost when changing injector(s). they should of checked that after installing the injector. If it were only a quart or 2 low it's not a big deal, but they still should of checked it.
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Old 10-08-2007, 11:56 AM
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sounds like its very possible that the injector wasnt installed correctly , or the wrong injector was put in, ive seen an older body style 94 -97 injector put in a new 99-03 engine and cause a noticeable fuel knock,ive believe i would take it back and make them fix it
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