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350 ECM & 305 ECM - Are they the same?

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Old Nov 10, 2007 | 04:52 AM
  #1  
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From: West of Toronto
Car: 89 IROC
Engine: 305 TPI / ZZ4 cam
Transmission: Stage 2 700R4, LS1 driveshaft
Axle/Gears: Strange 3.42 w/ Auburn
350 ECM & 305 ECM - Are they the same?

I was wondering if the ECM on a 350 TPI and the ECM on the 305 TPI are the same?

What is the difference?

Are the wiring harnesses that same?

Thanks.......
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Old Nov 10, 2007 | 06:50 AM
  #2  
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From: Arthur, Ontario, Canada
Car: 92Z28, 99SS, 83Z28 & 86GTA
Engine: 421, LS1, 327Turbo & 383
Transmission: T-56, 4L60E, T5 & 4L60
Axle/Gears: 4:10, 3:42, 2:73 & 3:27
Re: 350 ECM & 305 ECM - Are they the same?

year for year, the ECM and the wireing harness are the exact same, only the chip and the injectors are diferent
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Old Nov 10, 2007 | 08:09 AM
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From: Macedonia ,OH
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Transmission: 4L60E
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Re: 350 ECM & 305 ECM - Are they the same?

Originally Posted by Hawk92z-TDZ
year for year, the ECM and the wireing harness are the exact same, only the chip and the injectors are diferent
Knock sensor is differant too (all years) and ESC module (89 and earlier)
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