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Old 01-30-2018   #1
Theg
 
Join Date: Jan 2018
Location: Australia
Posts: 21
Default 92 LT5 ecu ignition program and control

Id like to gather info in relation to the ignition control of the LT5. I believe the crank signal goes to the ignition module and the module controls spark up to 400rpm then control of ignition is taken over by the ecu.
Id like to know what sensor signals are used by the ecu once ignition control is taken over .
In a nutshell I am trying to establish if the engine ignition would be sucessfully managed by the ecu if the fueling was added via carburettors and the injection removed . (Sounds odd I guess but this engine is in a hot rod not a corvette) . Trying to establish what sensors supply data that is used for ignition control and if injectors are bypassed would any sensors lost signals result in loss of the ecu's ignition control.
Any help greatly appreciated . Thanks to all .
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Old 01-30-2018   #2
-=Jeff=-
 
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Default Re: 92 LT5 ecu ignition program and control

Cool project.. wish I could help but there are few with info, hopefully they will see this
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Old 01-30-2018   #3
Theg
 
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Default Re: 92 LT5 ecu ignition program and control

This pic is what I am considering trying to achieve.
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Old 01-30-2018   #4
Theg
 
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Default Re: 92 LT5 ecu ignition program and control

The car
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Old 01-30-2018   #5
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Default Re: 92 LT5 ecu ignition program and control

Fake parts for looks on top of the motor? What is it in? Falcon XB GT?
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1990 Corvette ZR-1 #1051
Watson Headers (2" Primary) - 3" Magnaflow Bullet cats - LT4 Catback
Late Model IH - Plenum
Coilovers - 4.10s
Custom Interior
NCM Lifetime Member #978
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Old 01-30-2018   #6
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Default Re: 92 LT5 ecu ignition program and control

What is it?
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1990 Corvette ZR-1 #1051
Watson Headers (2" Primary) - 3" Magnaflow Bullet cats - LT4 Catback
Late Model IH - Plenum
Coilovers - 4.10s
Custom Interior
NCM Lifetime Member #978
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Old 01-30-2018   #7
Theg
 
Join Date: Jan 2018
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Default Re: 92 LT5 ecu ignition program and control

Its a Holden 1950 FJ ute . I chopped the back off it . Making it into a cab truck .
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Old 01-30-2018   #8
Theg
 
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Default Re: 92 LT5 ecu ignition program and control

The carbys are real . Im going to graft onto the plenum if its doable. Sell the throttle body and modify the front of the plennum for a nice rounded look.
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Old 01-30-2018   #9
Theg
 
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Default Re: 92 LT5 ecu ignition program and control

If I can do the carbs on the plennum or a fabricated new manifold theres a big advantage in looks for the engine bay having all ignition components hidden under the manifold .
Rod is going to have an open engine bay so would be very tidy without much visible wiring.
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Old 01-30-2018   #10
XfireZ51
 
Join Date: May 2007
Location: Chicagoland, IL
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Default Re: 92 LT5 ecu ignition program and control

Quote:
Originally Posted by Theg View Post
Id like to gather info in relation to the ignition control of the LT5. I believe the crank signal goes to the ignition module and the module controls spark up to 400rpm then control of ignition is taken over by the ecu.
Id like to know what sensor signals are used by the ecu once ignition control is taken over .
In a nutshell I am trying to establish if the engine ignition would be sucessfully managed by the ecu if the fueling was added via carburettors and the injection removed . (Sounds odd I guess but this engine is in a hot rod not a corvette) . Trying to establish what sensors supply data that is used for ignition control and if injectors are bypassed would any sensors lost signals result in loss of the ecu's ignition control.
Any help greatly appreciated . Thanks to all .
Do you have an FSM? What u r looking for is pretty much there.I’m assuming you don’t need to communicate w a chassis control module. That makes things easier. There’s someone in Australia that has a programmable ignition module that could work and replace the stock module.
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