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How can I check my Allison Transmission light?

How can I check my Allison Transmission light? Use the Intelletect switch if you have one. Start by verifying 12.0-14 VDC at the TWO transmission fuses in your chassis fuse box. Like any computer, low voltage due to bad battery, discharged battery, poor or corroded connection, etc can cause some peculiar issues. Next, query your Allison for diagnostic codes using your shift pad. Why is the do not shift light on my Allison not working? It could be a problem with power supplied to either the trans ecu or the shifter. Suggest you call Allison service for help how to...
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What kind of fuel injector does a marine engine use?

What kind of fuel injector does a marine engine use? We have previously examined marine diesel engine fuel injection systems where we looked at the Common Rail Diesel Injection System (CRDI). When burning heavy fuel oil, the injector will require cooling for efficient operation. How does a cooled fuel injector keep the engine cool? The valves are also cooled by recirculating the fuel oil around the fuel valve when not under pressure or when the engine is stopped. This also keeps the fuel oil hot and viscous, ready for the next injection. Where are the fuel injectors located in the...
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What can cause an ignition system to misfire?

What can cause an ignition system to misfire? A typical modern ignition system contains a variety of components, including the control module, crankshaft position sensor, coil packs, wiring and, of course, the spark plugs. Issues with any of these parts can result in an engine misfire. 2. Air and fuel delivery problems What happens when you leave the ignition light on? Anytime there is a spark pulse in the wire, the neon bulb will flash -- dimly, but still flash. This does nothing to the effectiveness of the ignition system, so can be left there for a month or a...
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Can a computer be reprogrammed?

Can a computer be reprogrammed? Reprogramming your ECM is necessary for keeping your vehicle control software up to date. Much like the operating system on your home computer, improvements in software are often made by your car's manufacturer. The software can be updated simply by downloading and installing the latest version. How does Reprogramming Your engine computer work? How reprogramming an engine computer works. When reprogramming an engine computer, a scanner is attached to the diagnostic port in a car, which is typically inside the car, beneath the steering wheel. Old programming is erased, then replaced with the most up-to-date...
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How do you replace the fuel filter clips?

How do you replace the fuel filter clips? Locate the clips on either side of the cylindrical fuel filter, then use a flat head screwdriver to pop them out of the holes they are in. These clips may break as you remove them, so purchasing replacement clips along with your fuel filter is advised. How do you disconnect fuel line from fuel filter? Slide the fuel line quick disconnect tool into the end of the fuel line where the fuel line locks onto the fuel filter port. Press the tool inward until you feel the fuel line unlock from the...
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What kind of engine did Chevy Chevelle have in 1971?

What kind of engine did Chevy Chevelle have in 1971? By Randy Bolig July 21, 2015 The year 1971 saw only subtle difference in the Chevelle body, but in previous years, the SS396 and SS454 options were performance oriented, and included either a 396ci engine or 454ci engine. What was the SS option on Chevy Chevelle? What this meant is that it became more of a dress-up option than a performance option. The SS option was available on only the two-door Malibu sport coupe, convertible, and El Camino bodies. This year GM informed all divisions that all engines sold, must...
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Why is the oil pressure in my car so low?

Why is the oil pressure in my car so low? As such, there is not enough oil going up the pipe. This can result in low oil pressure. Pressure can also drop because the pump is no longer functioning as it’s supposed to. The work of the oil pump is critical since it facilitates the movement of the motor lubricant throughout the system. Why does my blood pressure drop when I stop the oil pump? While the oil pump is not a human heart, its function is quite similar to that. Hence, when it gets damaged, you can expect the...
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What happens when your shift indicator is not working?

What happens when your shift indicator is not working? When you put your vehicle in drive, but it goes into neutral, then your shift indicator is not reading right. This can be a hazardous situation because your vehicle could act unexpectedly, and you will not know which gear your vehicle is really in. Where is the shift indicator on a check transmission? Average rating from 6 customers who received a Check Transmission System. The shift indicator is located next to the gearshift assembly. As soon as you move the vehicle into gear, the shift indicator will let you know what...
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How are actuators used to control vehicle mode and temperature?

How are actuators used to control vehicle mode and temperature? The blower motor moves air through the system. Air may be drawn from the outside or we can recirculate the air that is in the vehicle. This is necessary for maximum cooling and greatly reduces the load on the air-conditioning system. When cooling, dehumidifying it and removing heat makes air far more comfortable. Where is the AC mode selector / actuator located? If you look up under the dash on the passenger side you will see an actuator behind the center console, but this is for the passenger side temperature...
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What are the components of the GM throttle body?

What are the components of the GM throttle body? There are three major components of the GM Electronic Throttle Body and they are: Throttle body. Throttle Actuator Control (TAC) module. And Accelerator Pedal Assembly. In this section, we'll focus on the Electronic Throttle Body. How to test throttle position sensor ( GM 4.3L )? You can find this tutorial in Spanish here: Cómo Probar El Sensor TPS (1996-2004 GM 4.3L, 5.0L, 5.7L) (at: autotecnico-online.com ). Beside the check engine light (CEL) being on and driving you nuts, your Chevy or GMC pick up (or SUV or van) may be experiencing...