General ECM question
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Junior Member
Joined: Apr 2001
Posts: 19
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From: cotati, ca, usa
General ECM question
i just swaped motors from a 305 to a 350, now i switched the PROM chips but what i want to know is do i have to swap the whole fregin ECM or can i use the ECM from the 305? please help
Supreme Member
Joined: May 2000
Posts: 2,963
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Car: 1982 Z28
Engine: LS1
Transmission: T56
Depends on what ECM you're running. If it's the '165 or '730 no ECM swap needed, same piece runs either the 305 or 350. If it's some other ECM, post the part# and maybe someone will answer.
Assuming you're running TPI, here's a few considerations for ya:
Knock sensor needs to be swapped, supposedly they're tuned to listen for harmonic ranges specific to each platform.
Injectors also need to be swapped. If you run the 350 software it's configured for 22lb/hr injectors...your old 305 injectors are only 19lb/hr and it will likely run lean.
Assuming you're running TPI, here's a few considerations for ya:
Knock sensor needs to be swapped, supposedly they're tuned to listen for harmonic ranges specific to each platform.
Injectors also need to be swapped. If you run the 350 software it's configured for 22lb/hr injectors...your old 305 injectors are only 19lb/hr and it will likely run lean.
Junior Member
Joined: Jan 2001
Posts: 84
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From: Peachtree City, GA, USA
Originally posted by kevinc
Assuming you're running TPI, here's a few considerations for ya:
Knock sensor needs to be swapped, supposedly they're tuned to listen for harmonic ranges specific to each platform.
Assuming you're running TPI, here's a few considerations for ya:
Knock sensor needs to be swapped, supposedly they're tuned to listen for harmonic ranges specific to each platform.
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