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Sounds like your electronic control module is going bad
electronic computer module Electronic control module
On the left side of the engine near the brake booster/master cylinder.
ECM, (Engine Control Module, Electronic Control Module) PCM, (Powertrain Control Module, Power Control Module) ECU, (Engine Control Unit, Electronic Control Unit).
Should find ECM just under center dash below radio and climate control panel
The 2000 Cadillac traction control module can be found on each wheel. There is a total of four traction control modules.
The powertrain control module is one of many electronic control modules on a 2003 Dodge Caravan.
SHould be under the passenger side front seat
Engine control module, or electronic control module
ecm stands for electronic control module
The electronic control module is an embedded system that controls one or more of the electrical systems in a motor vehicle. These are sometimes referred to as the car's computer.
I believe in 93 they had the newer style computer, this eliminated the electronic spark control module.