Does running the air conditioner stuff up the ecm?
No. The ECM is a computer.
What is the difference between a 1981 Malibu with a 267 a 1985 Chevy truck with a 305 emission and ecm wise?
Swapped a 350 into a 87 Chevy that originally had a 305 do you need to change the ECM for a 350 or will it work?
What controls the fuel injection on a 1991 Chevrolet 7.4 you understand there is no mass air flow sensor?
The ECM reads the TPS, the O2 sensor, the engine coolant temp., the ambient air temp., barometric pressure, engine RPM, road speed, and will calculate the air volume consumed by the engine. Depending on what the programed algorithms in the ECM say, the ECM will pulse the injectors a set amount of time.
First of all what is the problem you are having? The main thing the ECM on this vehicle is controling is the fuel richness. In other words if the ECM is not working then the jeep is either not running or not running well ie.. too rich (black smoke) or to lean. The stock carb is garbage and should be replaced with something like a motorcraft 2100 ( better than weber) and do nutter bypass…
There are two coolant sensors. One for the ECM and one for the gauge or light. The one for the ECM is located on the intake manifold near where the thermostat housing is. It'll be located on the back side of this and a little low. It can be hard to see because of the air intake hose. The one for the switch is located straight back from that one on the rear corner of…
On some modern cars, the ECM controls everything from timing to the fuel pump. Many others are not as reliant on it though. It depends on what type of car you have but if it's 2007 or newer, I doubt it would even turn over. If it's older and there's an issue with the ECM, you might notice it not to running as smoothly.
It won't flash any if there aren't any to flash. It should at least flash code 12 when you use the test terminals. If it doesn't then you probably have a bad ECM. Make sure that you have power going to the ECM first. Most of the GM cars have a power wire running from the battery directly to the ECM. Make sure this is connected and the ECM fuse is good.
the secondary air injection pressure sensor is built into the air injection control valve located at the rear of the engine compartment just above the exhuast manifold, it reports the air pressure in the air injection line to the ecm, the ecm compares this pressure to barometric pressure to test the air injection system, the test has 3 phases, 1st the pump is turned on with the control valve off and the ecm should see…
The Engine Control Module (ECM) or sometimes called the ECU is what the layman would call the computer. It manages many systems in a car depending on the manufacture. It controls the fuel/air mixture, and all emissions controls in the vehicle. It can control other aspects of the vehicle. Without the ECM your car would not run.
find your fuse , probably in the passenger side glove compartment. thers a fuse marked ecm. i like to disconnect my negative battery terminal first. take out the ecm fuse. wait 20 minutes , then reconnect ecm fuse, and then the battery. let engine sit in park while running for 20 minutes ( very important). i have to let mine sit so its idle rpm done learns itself. i recommend it.
If you have gas in the exhaust then you are running the engine too rich, and too much fuel fouls the plugs thus causing the rough idle. I suggest you look at your 02 sensor(s). They are probably fouled too. 02 sensors send a signal to the ECM as to the air to fuel mixture and the ECM then sends a signal to the injectors as too how much fuel to allow into the combustion…
The idle shutdown mechanism depends on how the ECM is set up... there are many ways this can be done. Running it at high idle might or might not override the idle shutdown, dependent on how the parameters are set. If you have ambient air temperature override, you can tape a hand warmer to the temperature sensor.
The ECM is short for Electronic Control Module and is a computer that is designed to monitor the component it belongs to. An engine ECM monitors emissions, fuel, air, speed, temperatures and has limits programed that keep horsepower and fueling in check mainly for emission purposes. It can also alert operator of any loop errors, Ie: check engine light elerts you when ECM detects loop error such as oil pressure low or catylst malfunction.
"ECM" stands for "Error Correction Mode". Most modern fax machines do support this, but there are still millions of older machines in use that don't. Typically, if you send a fax from an ECM machine to another ECM machine, they will "negotiate" to use ECM. And conversely, if an ECM machine calls a non-ECM machine, they will negotiate to not use ECM (since all ECM machines can "fall back" to non-ECM mode). In general, using…