Found “performance” chip in my ECM

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Jul 25, 2025 | 06:59 PM

armyvman

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Joined: Mar 2025

Posts: 39

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From: Oregon

Car: 1989 Camaro IrocZ

Engine: 350 5.7L V8

Transmission: 4 speed automatic (stock)

Found “performance” chip in my ECM

Hello,
I’m working on restoring a 1989 Camaro irocz, 350, and I started to get into the electronic guts of it.

When I opened up the ECM, I found this ADS chip in it.

can anyone tell me if it’s something worth keeping, or should I revert back to a stock one?

Jul 25, 2025 | 07:15 PM

Tuned Performance

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From: Mile High Country !!!

Car: 1967 Camaro, 91 z28

Engine: Lb9

Transmission: M20

Axle/Gears: J65 pbr on stock posi 10bolt

Re: Found “performance” chip in my ECM

They work okay, slight changes to timing, fueling, tcc lockup and fan on/offs. If you’re wanting a stock chip I probably have aujm or similar calibration.

https://www.3rdgenformula.com/89/promcodes.htm