Repinning TBI to Speed Density TPI
Joined: Dec 2004
Posts: 16,754
Likes: 996
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: Repinning TBI to Speed Density TPI
The diagrams are in the beginning of the thread for 88, 89-92 tbi ecm to 90-92 1227730 ecm
Joined: Dec 2004
Posts: 16,754
Likes: 996
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: Repinning TBI to Speed Density TPI
Yes post 3, the 747 truck is the same pinout except the 846 has a iat
Member
Joined: May 2000
Posts: 415
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From: Chilliwack, BC
Car: 1992 Camaro RS
Engine: 5.7 V8 TPI
Transmission: T-5 5-Speed Manual
Re: Repinning TBI to Speed Density TPI
I’ve just completed the repining of the TBI harness on my ‘92 RS and almost everything seems to be good. The one issue I have, is that the SES light is on and jumpering the a/b pins on the ALDL does nothing. No code 12 and no other codes, just a steady glow of the SES light.
any ideas?
any ideas?
Member
Joined: May 2000
Posts: 415
Likes: 0
From: Chilliwack, BC
Car: 1992 Camaro RS
Engine: 5.7 V8 TPI
Transmission: T-5 5-Speed Manual
Member
Joined: Jan 2013
Posts: 115
Likes: 0
From: minnesota
Car: 89 Firebird
Engine: 5.7
Transmission: 700r4
Axle/Gears: unkown
Re: Repinning TBI to Speed Density TPI
Step 4: 1227730 conversion
Splice the right bank injector wires to 4 injector plugs. All the grounds go together to one wire, all the positives go together to the other wire. Now, splice the left bank in place to the left 4 injector plugs. If using TPI plugs, the green plugs go on right side, the red plugs go on left side.
Remove the ESC module. Cut the connector off, and splice wires C and E together. Tape up, and hide someplace neat.
Connect MAT, TPS, CTS, and IAC. Extend wires if needed.
Step 5: Repin
Now, repin ECM connector using following table:
Step 6: Calibration changes
At minimum, you will need to change the VSS constant from "magnetic" to "optical" because the 4-out buffer box outputs 2k pulses per mile, vs the 4k pulses per mile that the $8D calibration expects.
You may need to disable VATS, EGR, etc depending on how you did your swap.
Splice the right bank injector wires to 4 injector plugs. All the grounds go together to one wire, all the positives go together to the other wire. Now, splice the left bank in place to the left 4 injector plugs. If using TPI plugs, the green plugs go on right side, the red plugs go on left side.
Remove the ESC module. Cut the connector off, and splice wires C and E together. Tape up, and hide someplace neat.
Connect MAT, TPS, CTS, and IAC. Extend wires if needed.
Step 5: Repin
Now, repin ECM connector using following table:
Step 6: Calibration changes
At minimum, you will need to change the VSS constant from "magnetic" to "optical" because the 4-out buffer box outputs 2k pulses per mile, vs the 4k pulses per mile that the $8D calibration expects.
You may need to disable VATS, EGR, etc depending on how you did your swap.
Thread Starter
Joined: Jul 1999
Posts: 12,088
Likes: 125
From: SALEM, NH
Car: '88 Formula
Engine: LC9
Transmission: 4L60E
Axle/Gears: 3.89 9"
Junior Member
Joined: Feb 2019
Posts: 20
Likes: 0
From: Deer Lodge, TN
Car: '91 S-10 & '27 T coupe
Engine: 350
Transmission: 700r4
Re: Repinning TBI to Speed Density TPI
I would like to know if this pinning order, is the same for going from a 8062 ecu wiring, to a 7730 ecu.
I am installing TPI 350, speed density into my '91 TBI S-10. I had the chip burned for the 7730. Now I just need to find out what the re-pinning order is for it. Mine has 3 plug-ins on it. The 2 black side plugs, plug right in, but the 3rd is totally different.
Thanks, Pat
I am installing TPI 350, speed density into my '91 TBI S-10. I had the chip burned for the 7730. Now I just need to find out what the re-pinning order is for it. Mine has 3 plug-ins on it. The 2 black side plugs, plug right in, but the 3rd is totally different.
Thanks, Pat
Joined: Dec 2004
Posts: 16,754
Likes: 996
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Junior Member
Joined: Feb 2019
Posts: 20
Likes: 0
From: Deer Lodge, TN
Car: '91 S-10 & '27 T coupe
Engine: 350
Transmission: 700r4
Re: Repinning TBI to Speed Density TPI
I've registered a couple of days ago, there, but they still won't let me read/see what you posted.
Joined: Dec 2004
Posts: 16,754
Likes: 996
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: Repinning TBI to Speed Density TPI
Post #4 was requested wiring diagrams to compare for the 730 swap
Junior Member
Joined: Feb 2019
Posts: 20
Likes: 0
From: Deer Lodge, TN
Car: '91 S-10 & '27 T coupe
Engine: 350
Transmission: 700r4
Re: Repinning TBI to Speed Density TPI
Still won't let me look at them yet this morning! They Need to wake up over there. This wait is ridicules!
Thread Starter
Joined: Jul 1999
Posts: 12,088
Likes: 125
From: SALEM, NH
Car: '88 Formula
Engine: LC9
Transmission: 4L60E
Axle/Gears: 3.89 9"
Re: Repinning TBI to Speed Density TPI
Crazy.. I started this thread 20 years ago. People are still repining these and using factory ECMs.
Member
Joined: Sep 2002
Posts: 253
Likes: 25
From: honolulu
Car: '86MCSS
Engine: 396 .030"
Transmission: M20
Re: Repinning TBI to Speed Density TPI
I have no problem seeing any of the attached items in your thread that you started over there. You need to be logged in to that site to see or download any of the attachments there. ...or maybe you're clicking on the actual picture of theattached xls/pdf, try clicking on the number/words of the posted file.
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