What does the coolant temperature sensor tell the ECM?
The engine coolant temperature sensor simply tells the car’s computer (ECM) the current temperature of the vehicle. When the temperature of the coolant reaches between 75 and 95 degrees (depending on the manufacturer specifications), the ECM instructs the radiator fan to turn on and start cooling down the liquid.
How does the ECM know the location of the crankshaft?
It is responsible for telling the ECM the exact location of the crankshaft as well as the RPM (rotations per minute) of the engine. With this information the ECM knows the position of each piston in each cylinder. Using the cam sensor readings, as well as the crank sensor readings, the ECM knows exactly which injector needs to be activated.
What should I look for in tuning a cold start car?
Our aim when tuning cold start, is to get as close as possible to the sort of performance we get from a factory car.
Is the MaxxForce 13 hard to start in the Cold?
These are hard to start in the cold. Are you waiting for the cold start light to flash indicating it is time to crank? We find if it is really cold to turn on the key, let the cold start assist cycle, once the light starts to flash, turn the key off, then turn back on and let it cycle a second time for easier and faster starts.
Our aim when tuning cold start, is to get as close as possible to the sort of performance we get from a factory car.
What are the VE values in cold start?
1) During watching cold start webinar based on Motec M1 ECU, I noticed that VE values in cells of the base map that refer to cranking are around 60-65%. Why is this so? I see manifold pressure between -5 or -7 kPa during cranking at very low speed, I always thought that there should be around 90% VE.
These are hard to start in the cold. Are you waiting for the cold start light to flash indicating it is time to crank? We find if it is really cold to turn on the key, let the cold start assist cycle, once the light starts to flash, turn the key off, then turn back on and let it cycle a second time for easier and faster starts.
Why do so many people struggle with cold start tuning?
Cold start tuning is an area that a lot of tuners and enthusiasts really struggle with. This really comes down to not having a full understanding of the fundamentals behind it and not knowing how to make the necessary adjustments in order to get the cold start working perfectly. Well, we’re here to help.