PCM capacitor source?
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Mountain Pass
Joined: Dec 2006
Posts: 249
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From: Osburn, ID
PCM capacitor source?
Been reading about leaking capacitors so I thought I would take a look at mine. Before I remove the PCM/ECM I would like to have the caps to replace if leaking. What size do I need and where can I find them for a 93 f150 4.9 manual trans? Thanks
Post Fiend
Joined: Apr 2002
Posts: 19,311
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From: Waterloo, Iowa
If you go to the trouble of removing the component (and the caps are 20+ years old) good plan would be to just shotgun all of them..
Reason being "leaking" is more of an electrical term, than what people think of. They quite often go bad without any visual bulging or actual electrolyte leakage, in fact that may be the exception?
The only way to test an electrolytic is at rated voltage, simply measuring uF with a typical capacitance checker won't do this, they are pretty much useless.
Reason being "leaking" is more of an electrical term, than what people think of. They quite often go bad without any visual bulging or actual electrolyte leakage, in fact that may be the exception?
The only way to test an electrolytic is at rated voltage, simply measuring uF with a typical capacitance checker won't do this, they are pretty much useless.
Cargo Master
Joined: Mar 2007
Posts: 2,935
Likes: 34
From: Arcadia, Fla
I recall there are 2 of the 10uf capacitors and 1 of the 47uf capacitors. That will vary depending on which ECU you have.
Anyway replace the capacitors with the same UF rating but use a higher voltage rating of 50V. The originals were at 16V and over time voltage spikes would execed the voltage rating of the caps, that damages them over time and hence problems "after warranty".....
I see this in all electronics(TV's, audio ect...) I call it "planned obsolescence"
Rat Shack should have those capacitors, but don't exepct much help with the "cell phone" sales people there.
Anyway replace the capacitors with the same UF rating but use a higher voltage rating of 50V. The originals were at 16V and over time voltage spikes would execed the voltage rating of the caps, that damages them over time and hence problems "after warranty".....
I see this in all electronics(TV's, audio ect...) I call it "planned obsolescence"
Rat Shack should have those capacitors, but don't exepct much help with the "cell phone" sales people there.
pedant
Joined: Jan 2008
Posts: 23,576
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From: EXTREME southwest CT
Laughing Gas
Joined: Nov 2013
Posts: 871
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From: Orcas Island, WA
I view it more as value engineering by bean counters. Let's see, if we save three cents for each unit manufactured, and we manufacture.... Well, you see where this is headed.
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Mountain Pass
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Senior User
Joined: May 2005
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From: Carthage, MO
Here are the Digi-Key numbers if you're interested.
Qty 2: P14411-ND (47uf)
Qty 1: P13467-ND (10uf)
I got enough to do 3 trucks and everything was just over $5 even after shipping. Not expensive stuff here.
Qty 2: P14411-ND (47uf)
Qty 1: P13467-ND (10uf)
I got enough to do 3 trucks and everything was just over $5 even after shipping. Not expensive stuff here.
Tuned
Joined: Jan 2013
Posts: 398
Likes: 3
From: Vancouver Island BC
I've allways wondered this myself... In know there are companies out there that you can send your PCM to and have them repaired. But if its just a simple capacitor swap, that's no big deal... Anyone done one here, or is there a how to?
Just wondering; if its simple enough, why not do it as preventative maintenance?
Just wondering; if its simple enough, why not do it as preventative maintenance?
Post Fiend
Joined: Apr 2002
Posts: 19,311
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From: Waterloo, Iowa
Lots of household appliances use them, televisions for just one example. If the power supply is bad, nothing else much matters, troubleshooting is pointless.
Here's another source, mostly geared for computers but they might have some good deals or general info: http://www.badcaps.net
Elder User
Joined: Dec 2003
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From: Northern California
A9x ECM's (and same years ECM's) Failures Due to Age
Easy to do.
Bob
Laughing Gas
Joined: May 2015
Posts: 826
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From: Golden, CO
DigiKey is out of stock for these, and Radio Shack only sells toys or phones these days…
Mouser shows 3 results for EEU-EB1J100S:
https://www.mouser.com/Search/Refine...d=EEU-EB1J100S
Since the "S" is also out of stock, would either of the other two work in its place? From cursory look, seems the difference is "high temp" vs. "general purpose".
Mouser shows 3 results for EEU-EB1J100S:
https://www.mouser.com/Search/Refine...d=EEU-EB1J100S
Since the "S" is also out of stock, would either of the other two work in its place? From cursory look, seems the difference is "high temp" vs. "general purpose".
