C5 corvette ecu 5.3 swap
Thread Starter
3rd Gear
Joined: Apr 2021
Posts: 3
Likes: 0
C5 corvette ecu 5.3 swap
Hi I have a c5 corvette with a swapped 5.3 in it and my mechanic is saying I need a new ecu/ecm I’m trying to see where can I get one and do I need to get one for my car year or the 5.3 engine
Drifting
Joined: Nov 2019
Posts: 1,267
Likes: 381
From: SC
There should be some sort of number on the ecu you currently have. More details would be helpful. What year is your car, and what 5.3 engine is in it.
It’s possible whoever did the swap could have used the ecu from the new engine, but I’d imagine they used the one that came with the car.
As far as where to get one, ebay is a good option. Could find one from a junkyard as well depending on which ecu you need, likely 0411
It’s possible whoever did the swap could have used the ecu from the new engine, but I’d imagine they used the one that came with the car.
As far as where to get one, ebay is a good option. Could find one from a junkyard as well depending on which ecu you need, likely 0411
Racer
Joined: Apr 2021
Posts: 289
Likes: 102
From: Texas
I find that a little strange. I would think the size of the engine is not important here, but that it thinks it's an LS and 8 cycliners. After that, it's just programming for the ignition/fuel/air table and such. I could see you needing a new program tune done on it, but not an ECU.
Because if you swap the ECU, you need to make sure that whatever ECU replaces it still is aware of all the other items it interacts with. Like all the sensors. And what Tooth reluctor, O2 types, and such.
I'd say find out what the engine might have come from so you have the specs, but I think it's easier to simply have a tune done on the existing ECU.
But if you do a swap you will need to compare what is different so it can be programmed out.
Because if you swap the ECU, you need to make sure that whatever ECU replaces it still is aware of all the other items it interacts with. Like all the sensors. And what Tooth reluctor, O2 types, and such.
I'd say find out what the engine might have come from so you have the specs, but I think it's easier to simply have a tune done on the existing ECU.
But if you do a swap you will need to compare what is different so it can be programmed out.
Drifting
Joined: Mar 2018
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From: New Jersey
Last edited by C5MSG2004Vert; Apr 28, 2021 at 11:19 AM.
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Moving this over to C5 Tech.
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Safety Car
Joined: Aug 2011
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From: Portland OR
For the ecu, any 4896 or 0411 will work.
You will however need to program it for your year of car. Including your VIN number.
The 5.7 tune will run a 5.3 just fine with some tuning.
What is the issue with your ecu that it needs replaced?
You will however need to program it for your year of car. Including your VIN number.
The 5.7 tune will run a 5.3 just fine with some tuning.
What is the issue with your ecu that it needs replaced?
Burning Brakes
Joined: Oct 2007
Posts: 1,093
Likes: 33
From: Morristown TN
How does the 5.3 compare to the 5.7 in the Vette?
I have a 2007 GXP Grand Prix with the factory 5.3 in it and it will push that tank pretty good, if only it was not front wheel drive. I have gone through 2 axles and 2 steering racks.
I have a 2007 GXP Grand Prix with the factory 5.3 in it and it will push that tank pretty good, if only it was not front wheel drive. I have gone through 2 axles and 2 steering racks.