C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

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Old Sep 29, 2014 | 04:39 PM
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I have 1989 fuel injection is gone I put a holly on do I need to change the distributor and will the ECM still work the overdrive
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Old Sep 29, 2014 | 09:51 PM
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Originally Posted by skipalongrice
I have 1989 fuel injection is gone I put a holly on do I need to change the distributor and will the ECM still work the overdrive
fix the injectors?? sorry i know this comment adds no value whatsoever.
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Old Sep 30, 2014 | 01:39 AM
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The overdrive is controlled by the transmission. The ECM only controls the torque converter lockup.

The ECM controls the timing, using the distributor as a source for timing pulses. You should keep it or change to a "small cap" electronic distributor with a remote coil (I wouldn't).
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Old Sep 30, 2014 | 04:11 PM
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Originally Posted by Cliff Harris
The overdrive is controlled by the transmission. The ECM only controls the torque converter lockup.

The ECM controls the timing, using the distributor as a source for timing pulses. You should keep it or change to a "small cap" electronic distributor with a remote coil (I wouldn't).
Ok what have is a corvette with no injection not even the motor so I put an older motor in with a carb so my question is will the ECM work the lock up in the torque converter or do I have to change and do an after market lock up

Last edited by skipalongrice; Sep 30, 2014 at 04:13 PM. Reason: added more to my reply
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Old Sep 30, 2014 | 04:17 PM
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Why not just find a top end TPI unit and put it back stock?
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Old Sep 30, 2014 | 04:22 PM
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Default no injection

[QUOTE=skipalongrice;1587942626]Ok what have is a corvette with no injection not even the motor so I put an older motor in with a carb what I'm not sure of is will the ECM still lock up the torque converter in 4 Th gear or do I need an aftermarket lock up Thank you all for your knowledge
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Old Sep 30, 2014 | 04:26 PM
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[QUOTE=skipalongrice;1587942708]
Originally Posted by skipalongrice
Ok what have is a corvette with no injection not even the motor so I put an older motor in with a carb what I'm not sure of is will the ECM still lock up the torque converter in 4 Th gear or do I need an aftermarket lock up Thank you all for your knowledge
Originally Posted by We Gone
Why not just find a top end TPI unit and put it back stock?
I cant afford one and more important I know nothing about them I prefer old school much easier would prefer points over electronic.
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Old Sep 30, 2014 | 04:42 PM
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[QUOTE=skipalongrice;1587942752]
Originally Posted by skipalongrice

I cant afford one and more important I know nothing about them I prefer old school much easier would prefer points over electronic.
Good luck, I'm sure some of the guys who have made the backward conversion will post up with some help for you. I went the other way many years back and put a TPI & R700 in an 80 if I remember I got a vacuum relay to work the lock-up converter.

Search function works great..

https://www.corvetteforum.com/forums...onversion.html

Last edited by FASTAZU; Sep 30, 2014 at 04:46 PM.
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Old Sep 30, 2014 | 05:02 PM
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[QUOTE=We Gone;1587942863]
Originally Posted by skipalongrice

Good luck, I'm sure some of the guys who have made the backward conversion will post up with some help for you. I went the other way many years back and put a TPI & R700 in an 80 if I remember I got a vacuum relay to work the lock-up converter.

Search function works great..

https://www.corvetteforum.com/forums...onversion.html
Thanks for taking time and responding
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Old Oct 1, 2014 | 12:58 AM
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Originally Posted by skipalongrice
will the ECM work the lock up in the torque converter or do I have to change and do an after market lock up
The ECM locks the torque converter when you go faster than 40 MPH. You have to have the VSS hooked up and working so the speedometer works. The dash passes the speed on to the ECM so it knows the vehicle speed.
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Old Oct 1, 2014 | 04:41 AM
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Originally Posted by Cliff Harris
The ECM locks the torque converter when you go faster than 40 MPH. You have to have the VSS hooked up and working so the speedometer works. The dash passes the speed on to the ECM so it knows the vehicle speed.
Thank you for the info appreciate it
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Old Dec 25, 2014 | 03:55 PM
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Default my 1989 dash

is there a way too check the dash to make sure the problem I am having is the dash it started when I was driving every thing went out then within seconds it came on like I had just turned the key on this happened 3 or 4 times then they went out and have been out ever since witch wires would I check for power at the plug plugging into the dash.
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Old Dec 26, 2014 | 12:10 AM
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Default go to youtube and google the dash

there are guys who post the fix and symptoms and also sell new replacement if u want b
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Old Dec 26, 2014 | 12:44 AM
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Originally Posted by skipalongrice
is there a way too check the dash to make sure the problem I am having is the dash it started when I was driving every thing went out then within seconds it came on like I had just turned the key on this happened 3 or 4 times then they went out and have been out ever since witch wires would I check for power at the plug plugging into the dash.
You really should start a new thread when you have a problem that is not related to the original problem. That is known as hijacking the thread and is considered to be bad netiquette.

You need to take the dash out and examine the connections on the PC board. This site will help you:

http://www.batee.com
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Old Dec 26, 2014 | 01:07 AM
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Originally Posted by Cliff Harris
You really should start a new thread when you have a problem that is not related to the original problem. That is known as hijacking the thread and is considered to be bad netiquette.

You need to take the dash out and examine the connections on the PC board. This site will help you:

http://www.batee.com
I have been trying not sure how too start one got lucky on the first 2
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