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LT5 Ignition · 02-28-2011

Thanks,
Some more ignition stuff:
I believe the 1990 LT5 engine was released prior to Northstar. One difference between Ignition modules. Northstar ignition used 2 VR crank sensors with 24 pulses (or was it 32 ?) per revolution rather than the 1 sensor and 9 pulses of LT5.

The ignition module uses suface mount components and is potted. Than a lid is sealed over. Typical sealing of igniton modules of the time not designed to be serviced. A serious electronics expert may want to try. Another thing it contains is a Motorola processor with EEPROM. If it lost its memory I do not know what one would do.
the whole module was made by Motorola who supplied it to Delco Remy who supplied it to the Chevrolet group. It does have a back up mode that allows ignition output if communication is lost from the ECM.

I would be happy to help discuss some after market system ideas such as MSD?
I'll check back Wed.

02-28-2011	#1
LT5 Ignition Join Date: Feb 2011 Location: Sterling Heights, MI Posts: 11	Re: LT5 Ignition Systems Question??? Thanks, Some more ignition stuff: I believe the 1990 LT5 engine was released prior to Northstar. One difference between Ignition modules. Northstar ignition used 2 VR crank sensors with 24 pulses (or was it 32 ?) per revolution rather than the 1 sensor and 9 pulses of LT5. The ignition module uses suface mount components and is potted. Than a lid is sealed over. Typical sealing of igniton modules of the time not designed to be serviced. A serious electronics expert may want to try. Another thing it contains is a Motorola processor with EEPROM. If it lost its memory I do not know what one would do. the whole module was made by Motorola who supplied it to Delco Remy who supplied it to the Chevrolet group. It does have a back up mode that allows ignition output if communication is lost from the ECM. I would be happy to help discuss some after market system ideas such as MSD? I'll check back Wed.