Has anyone fixed a surging idle? - Ford Powerstroke Diesel Forum
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post #1 of 11 Old 04-24-2012, 05:50 PM Thread Starter
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Has anyone fixed a surging idle?

My truck has 155k on it and runs awesome. I have 48v on the ficm. T6 oil, ELC, 4* Delta. I have Quicktricks tuning. No matter what tune its on the Idle surges. Not all the time. Sometimes I be a McDonalds and it wants to ram me ahead, other times its smooth as silk. I ICP is new. I am thinking injector or IPR? Anybody have the same issue and figure it out?


03 F250 CC/SB 4x4
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post #2 of 11 Old 04-24-2012, 06:05 PM
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its done that 3 times to me before. no idea what it is. sitting at a stoplight and it try's to go. basically like your power braking it.

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post #3 of 11 Old 04-24-2012, 06:10 PM Thread Starter
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Yup, most of the time its not that bad but every now and then... WHoa!


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post #4 of 11 Old 04-24-2012, 06:42 PM
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Did you change out the ICP Sensor pigtail at the same time? Could be soaked in oil. Quick check is to unplug the sensor and see if it still does it. If it doesn't, it is likely your sensor.

2004 Excursion Limited, 194,000 miles,
Edge CTS (Gauges only), ZooDad, Turbo Timer, DieselSite Coolant Filter,
RCD EGR delete, CCV reroute, Amsoil By-pass Filter, FireStone RideRite Air Springs,
FICM from Ed with Atlas 40 tune, No Kitty, FPR Blue Spring, DC XP270 Alternator


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post #5 of 11 Old 04-24-2012, 06:50 PM Thread Starter
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Would cleaning the pigtail in electrical contact cleaner work?


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post #6 of 11 Old 04-24-2012, 09:50 PM
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It can't hurt. I would at least take a look at the connector and see if it is oil soaked. Cleaning it might help some, but I don't know if it will fix it, if it is soaked. Does it do it to some degree all the time? Is it always present, just the degree that it surges differently? Does it do it at idle in park?

2004 Excursion Limited, 194,000 miles,
Edge CTS (Gauges only), ZooDad, Turbo Timer, DieselSite Coolant Filter,
RCD EGR delete, CCV reroute, Amsoil By-pass Filter, FireStone RideRite Air Springs,
FICM from Ed with Atlas 40 tune, No Kitty, FPR Blue Spring, DC XP270 Alternator


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post #7 of 11 Old 04-25-2012, 05:11 AM Thread Starter
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Some days it runs perfect. It surges with no pattern. I can shut the truck off if its doing it, come back in an hour and it might not do it for a day or so. I never know.


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post #8 of 11 Old 04-25-2012, 07:06 AM
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My 04 has done it to me twice now in the past 3 weeks, I am going to check the ICP sensor plug and see what mine is like.
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post #9 of 11 Old 04-25-2012, 03:26 PM
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On a side note, my truck did this very rarely at one point. It turned out to be the FICM. It was a very light surge, would throw an injector balance soft code, not CEL, everytime is happened.

2004 Excursion Limited, 194,000 miles,
Edge CTS (Gauges only), ZooDad, Turbo Timer, DieselSite Coolant Filter,
RCD EGR delete, CCV reroute, Amsoil By-pass Filter, FireStone RideRite Air Springs,
FICM from Ed with Atlas 40 tune, No Kitty, FPR Blue Spring, DC XP270 Alternator


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post #10 of 11 Old 04-25-2012, 04:54 PM Thread Starter
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Funny you say that about the FICM. I soldered mine. Its borderline, 47-48 most of the time but occasionaly goes to 46. Will read 45 when cranking and when cold.


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