ECU Leaky Capacitor Repair

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ECU Leaky Capacitor Repair

Postby FC Zach » Wed Aug 09, 2017 10:01 am

Years ago I removed the ECU (89661-2B290) from my '92 due to the CEL staying on. It was later that I found this due to a failed capacitor.

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At the time I never considered repairing this and bought a replacement ECU from a forum member. It didn't help that my ECU looked like it was run over by a tank. .

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It wasn't until I saw a FB post of someone in need of a replacement ECU (theirs was in the same condition) that I remembered mine and decided to pull it from the attic for repair. After some online searching and seeing that this is a common issue, naturally I assumed mine is a ticking time bomb so I figured it would be wise to have a back-up ready.

I pulled two capacitors, both were leaking electrolyte. One on both the top and bottom board.

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I cleaned the electrolyte from the boards and placed an order for the replacements. I found the capacitors on ebay for very little. Just search "10uf 50v capacitors" (if it's the same caps obviously), I got a pack of ten for less than .40 cents each.

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http://www.ebay.com/itm/292182493462
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1992 Toyota Celica AllTrac
1987 Mazda RX7 Sport
1979 Yamaha G1A, rotary powered with Sachs KM24
1976 Hercules W2000, oil injected
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Re: ECU Leaky Capacitor Repair

Postby diceman » Wed Aug 09, 2017 11:38 am

There is a good thread on GT4DC but unfortunately photobuckets sharing policy means only my pics remain.
http://www.gt4dc.co.uk/forum/viewtopic. ... =30#p57080
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Re: ECU Leaky Capacitor Repair

Postby FC Zach » Wed Aug 09, 2017 12:56 pm

diceman wrote:There is a good thread on GT4DC but unfortunately photobuckets sharing policy means only my pics remain.
http://www.gt4dc.co.uk/forum/viewtopic. ... =30#p57080


Good read, thanks for the extra material!
1992 Toyota Celica AllTrac
1987 Mazda RX7 Sport
1979 Yamaha G1A, rotary powered with Sachs KM24
1976 Hercules W2000, oil injected
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Re: ECU Leaky Capacitor Repair

Postby underscore » Wed Aug 09, 2017 3:48 pm

Thanks for the reminder, I've been meaning to take apart my spare ECU and replace all of the caps in there (they're all going to be old and crusty by now).
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