STATOR WAS REPLACED, AFTER TEST START, THE ENGINE STAYS RUNNING ON 2 CYL. THE ONLY WAYS TO SHUT ENGINE OFF IS DISCONNECT 2 WIRES COMMING FROM THE STATOR, OR DISCONNECTING THE NEG. BATTERY CABLE, AND REMOVING A FUSE. HOW CAN THIS BE FIXED SO WHEN THE IGNITION SWITCH IS TURNED OFF, THE ENGINE TURNS OFF.
I would recheck wiring at stator.
How to Identify and Resolve Common Issues ?
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If the engine continues to run just as before you turned it off – as if you hadn`t turned it off at all – your ignition and fuel system are not shutting down. In that case, your car has an electrical problem that needs to be addressed. Either your ignition switch element or a power relay needs to be replaced.
If you switch your engine off and it continues to run or splutter then you are experiencing run-on or dieseling. This can caused by a number of things: 1) Too fast an idle speed. 3) Too lean a fuel mixture at top end from incorrect jetting or airleak, casuing the engine to overheat.
A fuel pump that stays on when the ignition is turned off can be caused by a few things. If you do not believe that the behavior is normal, then it may be possible that the the ignition switch or fuel pump relay have shorted and are feeding power to the pump.
If your car is revving without you pressing the gas, there are a few potential causes. It could be an issue with the throttle body or throttle position sensor, the idle control valve or vacuum leak. If your car has an automatic transmission, it could also be a problem with the transmission itself.
What is the Idle Stop Solenoid all about? Most older vehicles are equipped with a device called an idle stop solenoid that works to close off the throttle when the key is turned off. It prevents engine idle from continuing once the fuel and air stop being delivered to the engine.
There are only two ways to stop a diesel engine, cut off the fuel or the air. The easiest approach to stop a boat engine is to cut off the air. This approach leaves the engine perfectly service worthy and it will start again immediately.
Diesel engines don`t burn much fuel at idle. Diesel engines create more heat by idling. Diesel engines must idle or they won`t restart. engine wear, and should reduce air pollution.
The fuel pump relay is controlled by the PCM by providing the relay with a ground. The PCM chooses to turn the relay on when it sees the motor is running. If the PCM doesn`t see an indication of the motor running, it will not supply a ground path to the relay and the fuel pump will not receive power.
The ignition switch will momentarily provide power to the fuel pump and ignition system when it is in the cranking position, which may allow the vehicle to start. However, if it has failed in the “on” position, it will cut off power to the fuel and ignition systems as soon as the key is moved back to the “on” position.
A dirty air intake or cracked air intake tube is often the culprit.
Typically, engines idle at about 600-800 rpm. Older engines may go up to 1200 rpm or more while warming up. But if the engine is revving up while idling, even after it`s sufficiently warmed up, you might have a problem.
The most common idle solenoid symptom is an engine that won`t idle but will run above idle. When this happens, listen to the solenoid while a helper turns the ignition switch on and off. If the solenoid doesn`t click every time he cycles the ignition switch, check for battery voltage at the solenoid with the key on.
Check for Spark at Coil
Simply remove the coil wire from the distributor and leave it connected to the coil. Then place the disconnected end near a ground, crank the ignition, and watch for spark. An alternative is to check the resistance on the primary and secondary windings with the multimeter.
Fact: This is one of the most common myths about diesel engines. Most engine manufacturers recommend that newer diesel engines idle for no more than 3 minutes before driving.
The fastest way to stop a diesel runaway is to cut off the fuel and air supply. Because diesel engines need these two ingredients to stay running, finding the source of the fuel leak and stopping it is necessary. If you already know the cause, stop the fuel`s flow as safely as possible.
Diesel high idle keeps the oil pressure up to ensure that it`s properly circulating and lubricating the engine. It`s important for the oil pressure to be kept up to ensure that it`s properly circulating and lubricating the engine. High idle can help with this.
Diesel engine power loss can usually be attributed to something wrong with the fuel or the fuel delivery. In the case of contaminated fuel, this will affect your diesel engine`s power. Other problems include clogged fuel injectors, a loose throttle linkage, or problems with the engine`s lubrication.
Diesel engine runaway occurs when a diesel engine ingests a hydrocarbon vapor, or flammable vapor, through the air intake system and uses it as an external fuel source. As the engine begins to run off these vapors, the governor will release less diesel fuel until, eventually, the vapors become its only fuel source.
After a diesel delete is completed, the soot-clogging issues are eliminated. There may also be performance improvements such as an increase in torque/horsepower as well as an improvement in fuel economy.
Faulty Fuel Pump Relay: The fuel pump relay controls the power supply to the fuel pump. If the relay is faulty, it can cause the fuel pump to run continuously even when the engine is turned off. Bad Fuel Pump Control Module: The fuel pump control module is responsible for regulating the fuel pump`s operation.
Electronic Control Unit (ECU)
The ECU is the brain of the operation. It uses engine RPM and signals from different sensors to meter the fuel. It does this by telling the fuel injectors when and how long to fire. The ECU often controls other functions like the fuel pump and ignition timing.
As the engine is cranked, the crankshaft position sensor indicates to the PCM that the engine has reached a minimum cranking speed of about 250-300 rpm. At that point, the PCM re-activates the fuel pump.
The fuel tank pressure sensor is part of the fuel pump assembly and is mounted on top of the tank or inside the tank. It`s part of the evaporative emissions system (commonly referred to as “EVAP”) and reads pressure in the fuel system to detect evaporative leaks, such as a loose or faulty gas cap.
when you switch the ignition on, the fuel pump situated inside the fuel tank starts pumping fuel to the engine. so yes, it DOES run even when the engine is off, when the ignition is on.