7747 prom
12-31-2005, 04:18 PM
#1
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Car: 1982 z28, 2007 Silverado
Engine: 350 Chevy, 10-1 CR, Comp Cams 270h
Transmission: Th350,
Axle/Gears: 3.23
7747 prom
Hi Guys, I just eprom programmer, a couple of zif sockets, and a few 2732 eproms....
I took apart my 7747 ecm, and unsoldered the original eprom socket, and soldered in the new zif socket so that I could gain access to the lever....
My question is, when I removed the prom, I failed to take notice which side of the ECM the v-notch on the prom is supposed to go....
Does anyone know?
Thanks & Happy New Year!
Ck76239
I took apart my 7747 ecm, and unsoldered the original eprom socket, and soldered in the new zif socket so that I could gain access to the lever....
My question is, when I removed the prom, I failed to take notice which side of the ECM the v-notch on the prom is supposed to go....
Does anyone know?
Thanks & Happy New Year!
Ck76239
12-31-2005, 04:25 PM
#2
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Car: 1987 Iroc, 1987 MCSS TPI
Engine: 5.7L
Transmission: 700R4 in both
Of all the ones I've used, with the limp home chips on your right, the v notch is all the way on the left. I just took a picture, screwdriver is pointing to notch.
12-31-2005, 05:30 PM
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Car: 91 Red Sled
Axle/Gears: 10bolt Richmond 3.73 Torsen
Originally posted by 87tpi7749
Of all the ones I've used, with the limp home chips on your right, the v notch is all the way on the left. I just took a picture, screwdriver is pointing to notch.
Of all the ones I've used, with the limp home chips on your right, the v notch is all the way on the left. I just took a picture, screwdriver is pointing to notch.
On the 7747/8746/etc. the pin 1 should be facing the centerline of the ecm. If you installed a zif and have access to the handle then I'm pretty sure you've got it installed "correctly" where as pin 1 is closest to the lever.
01-07-2006, 11:21 AM
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Car: '87 IROC-Z/'82 RX7
Engine: SBC 355/1.1L Rotary
Transmission: T56/5 Speed
Axle/Gears: 4.33/3.93
TBI ^^^^^
Front 4 legs (2 each side, side with notch) hang off the adapter and are not used on the ecm.
01-08-2006, 05:52 PM
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Car: 1982 z28, 2007 Silverado
Engine: 350 Chevy, 10-1 CR, Comp Cams 270h
Transmission: Th350,
Axle/Gears: 3.23
Thanks Guys, that's what I needed to know 
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