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1989 Cadillac Brougham d'Elegance; 2000 Cadillac Deville
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14 Posts
Discussion Starter #1
I'm getting around to rewiring my Cadillac and I don't really want to deal with the thing. The motor, carb, and trans were all replaced and don't need the computer anymore. Is there anything else the ECU controls or can I just get rid of it.
 

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'84 Eldorado and Seville
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1,253 Posts
Almost sure it controls the engine RPM when the A/C compressor is engaged. When the dash control signals on a A/C call the blower motor control module and dash control signals the ECU which checks the A/C compressor cycle switch and if the A/C compressor is needed the engine RPM is increased and decreased when it dis-engages.
 

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1996 Federal Heritage Hearse
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212 Posts
On the 307 the ECU controls the carb and distributor. You say you replaced the carb. Did you replace it with a non CCC carb? The distributor will need to be replaced with non CCC unit.
 

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1989 Cadillac Brougham d'Elegance; 2000 Cadillac Deville
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14 Posts
Discussion Starter #4
The entire engine was replaced with an olds 350 from the 70s. No computer control.
 

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'72 Eldorado Convertible, '97 Eldorado ETC, '93 Fleetwood
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977 Posts
An '89 Brougham with the power to get out of its own way . . . what a concept 🤣
 

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1989 Cadillac Brougham d'Elegance; 2000 Cadillac Deville
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14 Posts
Discussion Starter #9
Exactly. Had to fight myself not to get some sbc mounts out of a '90 and some adapter plates and go with a turbo 5.3 ls instead.
 
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