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Leaking Capacitor?

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Old Feb 21, 2024 | 03:08 PM
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Leaking Capacitor?


Hello, not sure if I have an issue or not on my 1994 F250 7.5L ECM. Does it look like damage or leaking from the light blue capacitor on the right side (brown spot). I have run KOEO and KOER and have gotten the system pass 111.

. Thanks, Paul
 
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Old Feb 21, 2024 | 03:20 PM
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Looks mkay, yet you already are in there...swap them. They are 30 years old. All those OE bits are bottom of the bin stuff for life span.
 
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Old Feb 21, 2024 | 03:29 PM
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Just couldn't tell, cause it looks like brown goop . I just replaced the ecm with a reman off Rockauto and ordered a capacitor kit from blenddoor to have this one as a spare. Truck runs night and day different and no more gas smell in exhaust. Just chasing a drop from 10.5+ mpg to 5.5.
 
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Old Feb 21, 2024 | 03:44 PM
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Clapped out O2? Vac leak aka unmetered air?
 
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Old Feb 21, 2024 | 03:47 PM
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Originally Posted by Hit Man X
Clapped out O2? Vac leak aka unmetered air?
New Bosch o2 and no vacuum leak I can see with smoke test. Thank you for the help.
 
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Old Feb 21, 2024 | 03:51 PM
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Looks good to me, but as has already been said; It's 30 years old, and you're already in there....

Only way to know if it's good (or bad) is to take it out of the circuit and check it. And once you've gone that far....

At this point, just replace it/all of them. Cheap insurance, in my opinion.

Not to mention peace of mind.
 
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Old Feb 21, 2024 | 03:56 PM
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That's what I kind of figured and had the new ecm handy. Not the hardest to get to, but not easy either. Figured if I was taking it out yo check, have a new one yo go in and repair the original. Thank you again.
 
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Old Feb 21, 2024 | 05:29 PM
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This dont look good, could have been replaced, some time before, I would look at other side of board, also check for spots.

 
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Old Feb 21, 2024 | 05:37 PM
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Originally Posted by torq'ta 5 8
This dont look good, could have been replaced, some time before, I would look at other side of board, also check for spots.
That is my spot of concern. I didn't look at the other sideso thank you for the heads up. I just hope it is repairable so I can have a spare. Thank you for the heads up.
 
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Old Feb 21, 2024 | 05:44 PM
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Pic of other side. I don't see anything damaged in area.
 
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Old Feb 23, 2024 | 03:56 PM
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It will smell like fish when they leak.
Is there any residue or smells present?

At very least I would wash that area with some alcohol and a q tip before reassembling and installing. That electrolytic fluid can corrode and eat up the neighboring resistors etc.

If there has been a previous repair you can often see the protective film on the back has been adulterated in the area of the repair.
 
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Old Feb 23, 2024 | 05:08 PM
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Originally Posted by McLeod
It will smell like fish when they leak.
Is there any residue or smells present?

At very least I would wash that area with some alcohol and a q tip before reassembling and installing. That electrolytic fluid can corrode and eat up the neighboring resistors etc.

If there has been a previous repair you can often see the protective film on the back has been adulterated in the area of the repair.
Thank you for the tip. Just did what you suggested with the qtip and alcohol. Couldn't notice a smell but the qtips were dirty. Looks like some discoloration uder the capacitor and the horizontal (resistor) not sure if correct name next to it.
. Thank you again
 
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