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  #1  
Old 09-01-2009, 04:07 PM
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rough idle

i just replaced my ficm and still have a rough idle issue when i stop. i had the po611 code so i replaced the ficm. now i have no codes but still idles rough at some stop signs. anyone got ant ideas on what to look at?
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Old 09-01-2009, 04:14 PM
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Warm engine, cold engine? When does it do it?

Meet up with Dan and hook up to AE and run a buzz and contribution test
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Old 09-01-2009, 04:18 PM
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dan has one?
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Old 09-01-2009, 04:23 PM
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Quote:
Originally Posted by Dave View Post
Warm engine, cold engine? When does it do it?

Meet up with Dan and hook up to AE and run a buzz and contribution test
On the 6L's say it passes a buzz test all 8 and contribution is fine but it runs rough only while cold? As in up until that normal operating range... then once it's "warm" it smooths out like water. Does that mean the injectors are failing? Even though it acts normal at all times once it's warmed up. And is that any different for a 7.3? I heard that meant the injectors were failing, but I don't get how that can be if the engine runs fine once warmed up.

... not trying to hijack... I'm just curious.
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Old 09-01-2009, 04:27 PM
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Quote:
Originally Posted by TurboSevenThree View Post
On the 6L's say it passes a buzz test all 8 and contribution is fine but it runs rough only while cold? As in up until that normal operating range... then once it's "warm" it smooths out like water. Does that mean the injectors are failing? Even though it acts normal at all times once it's warmed up. And is that any different for a 7.3? I heard that meant the injectors were failing, but I don't get how that can be if the engine runs fine once warmed up.

... not trying to hijack... I'm just curious.
If it goes away when its warmed up it could be one of two things. You need an oil change or you have a sticking injector
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Old 09-01-2009, 04:27 PM
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mines does it when i stop at lights, not all the time there seems to be no rime or reason when, the whole truck just starts shacking. its like it has a problem idling sometimes when i come to a stop. when the trucks warm i guess.
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Old 09-01-2009, 04:43 PM
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Originally Posted by Dave View Post
If it goes away when its warmed up it could be one of two things. You need an oil change or you have a sticking injector
Hhmmmm. OK. Well that's interesting.
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Old 09-02-2009, 04:35 PM
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met up with dan today and did a buzz test and it passed and showed no codes.....
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Old 09-02-2009, 04:37 PM
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Originally Posted by scotty2280 View Post
met up with dan today and did a buzz test and it passed and showed no codes.....
Contribution/balance test...?
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  #10  
Old 09-02-2009, 04:49 PM
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it didnt give the option for that when it was hooked up.
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