A bad or failing ECM may produce any of the following 5 symptoms to alert the driver of a potential problem.
- Check Engine Light Turns On. An illuminated Check Engine Light is one possible symptom of a problem with the ECM.
- Engine Stalling or Misfiring.
- Engine Performance Issues.
- Car Not Starting.
- Poor Fuel Economy.
The first, and easiest, way to repair an ECM is if there's a problem with the power supply. Oftentimes, these can be repaired by a skilled mechanic or electrician, by rectifying any shorts or bad connections. However, most ECM problems are a result of a bug in the software itself.
If the ECM were to become damaged or faulty, then it could spell trouble for the entire engine because it would not be managed properly. If the engine is not managed properly, then it is not going to operate properly and then your car won't work properly.
"The electric fuel pump draws high current, so it is not controlled directly by the ECM. Instead, the ECM controls a fuel pump relay which in turn controls system voltage to the fuel pump circuit.
Corrosion and moistureCorrosion or damage due to moisture is one of the main reasons for ECM failure. Corrosion can enter the ECM through the wiring harness and moisture can enter by a failure in the seals in the ECM itself. This happens over a period of time (5 to 10 years) due to the ECMs exposure to the elements.
Your car's Engine Control Module (ECM) monitors all the sensors in the vehicle to make sure that the car's systems are running as they're supposed to. It also controls the transmission in automatic transmission vehicles, and valve timing on vehicles with variable valve timing.
PCM (Powertrain Control Module) – This is a combined engine and transmission control unit which will provide management and correct function of the engine and transmission from one control unit. ECU (Engine Control Unit) / ECM (Engine Control Module) – This is an electronic control unit that manages the engine only.
Engine coolant temperature sensor (ECT) and,ECM air conditioner compressor control. This helps an overheating engine by allowing the condenser to cool down and by removing the mechanical load of driving the compressor.
Fundamentally, the engine ECU controls the injection of the fuel and, in petrol engines, the timing of the spark to ignite it. As the air is sucked in, enough fuel has to be provided to create power to sustain the engine's operation while having a useful amount left over to propel the car when required.
Setting the correct ignition timing is crucial in the performance of an engine. Sparks occurring too soon or too late in the engine cycle are often responsible for excessive vibrations and even engine damage. The ignition timing affects many variables including engine longevity, fuel economy, and engine power.
Engine calibration involves tuning these variables and others to maximize performance across the operational range of engine speeds and loads. Because the effects of calibration variables are interdependent, it is impossible to calibrate an engine by simply optimizing one variable at a time.
Engine Problem #1: Engine Won't Start
- Low or discharged battery.
- Corroded or loose battery cables.
- Starter motor relay failure.
- Ignition switch failure.
- Faulty fuel pump.
- Clogged or dirty fuel filter.
- Neglecting oil and filter changes.
- Catalytic converter failure.
The easiest way to improve compression is with a set of 64cc chamber cylinder iron Vortec heads and that 0.015 head gasket, which will push the compression up to 9.0:1. One further recommendation would be to add a set of mid-length headers to the engine. This will do more to add power than any other thing you can do.
If you want to increase the horsepower, you've essentially got to find ways to move more air in a greater volume through your engine.
- Installing a High-Performance Cold Air Intake to increase horsepower.
- Installing a High-Flow air filter and intake.
- High Performance Exhaust System.
- Supercharger.
- Turbocharger.
- Nitrous.
A V-shaped engine with eight cylinders = V8 — four in each cylinder bank. The combustion chamber in an engine is where the magic happens. It's where fuel, air, pressure, and electricity come together to create the small explosion that moves the car's pistons up and down, thus creating the power to move the vehicle.
The location of the number one cylinder is important because it is the first cylinder in the engine firing order. The firing order is utilized by the powertrain control module (PCM) to properly sequence the ignition system firing of the spark plugs and opening of the fuel injectors.
A V-6 engine has six cylinders (two sets of three cylinders) arranged in a V pattern and mounted to drive a single crankshaft. The cylinder sets are normally mounted at a 60 or 90 degree angle to one another. The 60 degree angle allows a V-6 engine to fit comfortably into the same space as an inline-four.
Types of engines and how they work
- Thermal engines. Internal combustion engines (IC engines) External combustion engines (EC engines) Reaction engines.
- Electrical engines.
- Physical engines.
In a conventional internal combustion engine, the pistons complete a four-stroke power cycle (down, up, down, up) to move the air/fuel mixture through the engine in order to properly power your vehicle.
You totally can install the same model ECU into another car with the same model. If the car does not have an immobilizer, as long as you get an ECU from a car with the same engine and transmission, the car should start right up and work fine.
"Resetting the ECU" is the process of clearing all the long term memory from the ECU's memory. These variables trim idle speed, fuel, spark, and more. The ECU will also store trouble codes for diagnostic capability.
Usually a bad or failing ECU will produce a few key symptoms that can alert the driver of a potential issue.
- Check Engine Light comes on. An illuminated Check Engine Light is one possible symptom of a problem with the ECU.
- Engine stalling or misfiring.
- Engine performance issues.
- Car not starting.
Programming overview
- Connect the vehicle interface cable to the OBD-II connector and turn the ignition switch to ON.
- Open the ProECU software and choose Tools then Detect Vehicle.
- Select Program Engine ECU.
- Choose Query ECU to identify the ECU version fitted to the car.
Your parts may not be bad enough to warrant replacement, but the ECM should be reprogrammed to compensate for their older, more road-worn condition. With optimal ECM programming, your engine will run much more efficiently. Reprogramming your ECM is necessary for keeping your vehicle control software up to date.
How to Reset a Car Computer
- Open up the hood.
- Remove the positive terminal cable from the battery using your pliers or wrench.
- Go to your fuse box in your car, and look at the diagram. Select the fuse that is labeled "ECM" and remove this fuse.
- Keep the car disconnected like this for two to three minutes to clear the computer's memory.
