I'm the original owner of an 89 5.0 LX, 5 speed. It has low milage, but as I'd like to keep it for a while, thought it would be a good idea to accumulate some spare parts while they're still available. One of these spares would be an ECU. The original part number is E9ZF-12A650-A2A. Some vendors have these, but they're over $700. I've found another less expensive one with a part number of E9ZF-12A650-AA. Would anyone know if these are interchangeable? Thanks for any help.
Engine ECU Question
- Thread starter GeorgeE
- Start date
keel
Active Member
ECUs are rebuildable/serviceable (to a certain extent). I sent my ECU to ECU Exchange to get freshened up for about $200. This is always an option for you rather than buying a spare.
Mcmahst
5 Year Member
If this isn’t your daily driver, you could always use the service company ECUExchange, located in Florida, to test and rebuild ypur original as needed. I’ve had mine tested and repaired by them. Good luck.
Yours has lasted 37 years. It's not like they are particularly fragile.
If you're going to keep a spare of something, keep a spare clutch kit.
If you're going to keep a spare of something, keep a spare clutch kit.
keel
Active Member
I can't really speak to how Chevy and Ford ECUs are different in their construction but if you poke around on this forum and other late model Ford forums you will find that Ford EEC-IV computers are very solid. Issues are uncommon and when they do pop up its almost always aging capacitors, which by this point is a well documented and repairable problem.
Buy a spare off local facebook, don't pay eBay prices, three letter catch codes really don't matter to much vs matching auto to auto and 5spd to 5spd.. Rebuild it or send it out. Only one I would send one to is keyworks, too many others replace a few things and gives everyone the same canned response of we replaced so and so.
Most I'd pay for a core is $120 and at this point in age there all cores, never had a problem finding one. There dead simple single layer boards.
Most I'd pay for a core is $120 and at this point in age there all cores, never had a problem finding one. There dead simple single layer boards.
And both those part numbers E9zf AA and A2A are A9l's. so pretty much any foxbody 5spd mass air ecu will work.
keel
Active Member
As you can see, I like red. I think I'll get the cheap AA and skip the A2A and hope for the best.
If all's good now, although I'd send it to get checked anyway, cheap tuneup so to speak, it likely won't tell you it's malfunctioning, you have to ask the computer, I'd look for a A9L on the facepage local, you can hold it in your hand.
700 bucks and ebay? Not me.
700 bucks and ebay? Not me.
keel
Active Member
Sucker is mint. Don't know if you've been watching the market on low mileage notchbacks but they're worth a good chunk of change these days.As you can see, I like red. I think I'll get the cheap AA and skip the A2A and hope for the best.
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