what is a ecm.

Asked by Nov 22, 2015 at 04:37 PM about the 2001 Buick LeSabre Custom

Question type: Maintenance & Repair

i changed the plugs i changed the wiring one of the coil will not fire.

2 Answers

64,995

ECM is an older term for PCM. The vehicle's computer or "brain". OBD I (1981 thru 1995) vehicles used Electronic Control Modules. OBD II (1996 thru present) use Powertrain Control Modules. Before 1981 onboard computers were referred to as Electronic Control Units (ECU). Cadillac, for example, had ECUs as early as the mid-70s on their optional fuel injected engines. HTH. -Jim

6,965

seems like u might need a ignition module. ..engine must be running rough and missing.

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