Magnovox swap to Delco - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1987-1991 Parley with regards to your 1987 to 1991 Bonneville, Olds 88 or Buick Le Sabre Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 06-02-2007, 04:04 PM   #1
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Default Magnovox swap to Delco

Hello, i would like to know if anyone have done this swap to a 87 Lesabre. I have a 87
Lesabre T type. The donner car was a 87 Lesabre that already had the Delco parts.
All parts tested ok Coils, ICM. When i installed the Delco system in my car it wouldnt
start it just poped out the throttle body missed fired, turned over but would never start.
All the plug wires were put in the right spot. When i put the magnovox system back in
it fired right up. This is my every day driver and i put 170 miles a week on her. Only
reason why iam making the swap is to better the ideal because i here the Delco runs hotter. Thanks for any help. Aggie.
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Old 06-05-2007, 02:37 PM   #2
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Default swap

The swap is only compatible with a Vin C motor.
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Old 06-05-2007, 05:42 PM   #3
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Thanks for the reply, are you saying that you cant upgrade to the Delco on a 87
Lesabre 3.8 . What if the parts came out of a 87 Lesabre 3.8 that from the factory
had the Delco setup. Thanks, Aggie.
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Old 06-05-2007, 08:34 PM   #4
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Quote:
Originally Posted by aggie
Thanks for the reply, are you saying that you cant upgrade to the Delco on a 87
Lesabre 3.8 . What if the parts came out of a 87 Lesabre 3.8 that from the factory
had the Delco setup. Thanks, Aggie.
Your Car came with the Magnavox AC Delco # D1996

But D1946A Crosses to the 3.8 Lesabre..

Now the question would be if there was a wiring difference between the 2..

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Old 06-06-2007, 03:44 AM   #5
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The ignition system for the 3.8 and 3300 uses a different type 2 module (D1946A) compared with the type 2 module of the 3800 (D1977A) engines.

Wiring at the Module connector is as follows
Terminal /Circuit Number /Wire Color /Description

There is no difference between the wiring for the Type 1 and 2 modules on the Vin 3.
However- Voltages on these circuits are different depending on which system is installed, similar to the voltage differences in the Type 1 and 2 3800 modules.

3.8 Vin 3
A 423 White Electronic spark timing to ECM pin B4
B 424 Tan/Black ECM Bypass signal to ECM pin D5
C 430 Purple/White Reference Hi to ECM pin B5
D 453 Black/Red Reference Low (Ground) to ECM pin B3
E 121 White Tach signal to Cluster if equipped
F 643 Blue/White Crank Crank sensor pin C
G 642 Black/Yellow Crank Sensor pin B
H 641 Black/Light Green Crank Sensor pin A
J 630 Black SFI Cam signal to ECM pin A11
K 633 Brown/White Cam sensor Pin A
L 632 Black/Pink Cam Sensor Pin B
M 939 Pink/Black C3I Fuse
N 631 Yellow Cam Sensor Pin C
P 439 Pink/Black ECM Fuse

3300 Vin N
A 423 White Electronic Spark timing to ECM pin BC8
B 424 Tan/Black ECM bypass signal to ECM pin BC7
C 430 Purple/White Reference signal to ECM pin BD8
D 453 Black/Red Reference Ground to ECM pin BD9
E 121 White Tach signal to Cluster if equipped
F 646 Light Blue/White Crank Sensor pin A
G 645 Gray/Red Crank Sensor pin C
H 644 White/Black Crank Sensor pin D
J NOT USED
K 643 Dark Blue/White Crank Sensor pin B
L NOT USED
M 239 Pink/Black IGN fuse
N NOT USED
P NOT USED


3800 Vin C
A 423 White Electronic Spark timing to ECM pin BC8
B 424 Tan/Black ECM bypass signal to ECM pin BC7
C 647 Light Blue/Black 18X Hi Res to ECM pin BD11
D 430 Purple/White 3x out to ECM pin BD8
E 121 White Tach signal to Cluster if equipped
F 630 Black Cam reference to ECM pin BC5
G 643 Dark Blue/White Crank sensor pin B
H 646 Light Blue/White Crank sensor pin A
J 633 Brown/White Cam sensor pin A
K NOT USED
L 453 Black/Red Ref Low (Ground) to ECM pin BD9
M 645 Gray/Red Crank sensor pin C and Cam Sensor pin B
N 644 White/Black Crank sensor pin D and Cam sensor pin C
P 839 Pink/Black C3I and Fuel pump fuse
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