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Where can I find a EMS computer for this vehicle

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  • Cars & Trucks Master
  • 2,963 Answers

If you are saying ECU, then many places. but how do you know you need one? I'd get a second or third oppinion.

Posted on Apr 06, 2015

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What does ems mean



Welcome to FixYa.com



EMS means

Engine Management System


Thank you for Using FixYa.com

Kind Regards, Lee

Your FixYa Expert and Master Technician

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Feb 03, 2011 | BMW 318 Cars & Trucks

1 Answer

What does ems mean


Welcome to FixYa.com


EMS means
Engine Management System

Thank you for Using FixYa.com
Kind Regards, Lee
Your FixYa Expert and Master Technician
leedavidian_120.png

Feb 03, 2011 | 2004 BMW 3 Series

1 Answer

Crankshaft position sensor


Crankshaft Position Sensor Engine speed is a very important input to the Engine Management System (EMS). Crankshaft speed and position are the basis for many calculations made by the computer. Crankshaft position values are transmitted to the computer by pickup coils also known as Permanent Magnet (P/M) generators, hall-effect sensors or optical sensors. The Crankshaft Position Sensor (CKP) also known as engine speed sensor is located in close proximity to the crankshaft.
In addition, the EMS uses minute variations in the CKP sensor data to determine engine misfire. The EMS uses this information in conjunction with the camshaft position sensor to perform misfire diagnostics.
Related Symptoms No Start / Intermittent Start Condition - Can be caused by a faulty crankshaft position sensor due to loose connections, bad grounds, high resistance in the circuit, or opens in the circuit.
NOTE: For procedures on the position sensors, please refer to Driveability and Emissions.
Removal & Installation To Remove:
  1. Before servicing the vehicle refer to the precautions at the beginning of this section
  2. Raise and support the vehicle
  3. Remove or disconnect the following:
    • Air deflector
    • Oil filter adaptor gm_car_cad_sev_ckp_rem.gif

    • CKP sensor electrical connector
    • CKP sensor retaining bolt
    • CKP sensor
To Install:
  1. Lubricate the CKP sensor O-Ring with clean engine oil
  2. Install or connect the following:
    • CKP sensor and the retaining bolt
      1. Torque to: 89 lb-in. (10 Nm)
    • CKP sensor electrical connector
    • Oil filter adaptor
    • Air deflector
  3. Lower the vehicle to the ground.
  4. Operate the engine then inspect the CKP sensor for engine oil leaks.
  5. Perform the CKP System Variation Learn Procedure.
  6. Test drive the vehicle.
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Jan 19, 2011 | 2002 Cadillac Sts

2 Answers

Need a pic or diagram of location of Bank 2 sensor location on a 2004 Acura TL 3.2


Oxygen Sensor-I don't have a location of the Bank 2 sensor, so you'll have to guess on it by determining how many sensors you have by inspecting the exhaust system from the exhaust manifold down to the catalytic converter and past the catalytic converter which is downstream. Anything before the catalytic converter is upstream.
Do you have a code that describes which O2 sensor is not responding correctly?

Test/Replace
  • The sensor is threaded into the exhaust manifold.
  • It can be difficult to remove unless a special anti-seize compound is coated onto its threads.
  • Torque the sensor to 30 foot-pounds using a special socket.
  • A sensor that is too loose or a cracked exhaust manifold can result in a lean signal to the computer.
  • Check the vents in the thimble of a replacement O2 sensor.
  • There should be the same number of holes and they should face clockwise or counterclockwise like the ones on the original sensor.
  • Installing the wrong sensor can result in slower cross counts.

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Operation
Although the oxygen sensor is termed a sensor, in actuality it is a galvanic battery. The oxygen sensor compares the potential difference between the ambient oxygen content around the exhaust and the oxygen content present in the exhaust stream. When the exhaust sample is lean, there is more oxygen in the exhaust as compared to the atmosphere. When the exhaust sample is rich, there is less oxygen content in the exhaust as compared to the atmosphere. The greater the difference between ambient oxygen and exhaust oxygen content, the greater the voltage produced.
For the oxygen sensor(s) to operate properly, it has to reach an operating temperature of approximately 600°F before a consistent voltage potential can be generated.
The Engine Management System (EMS) determines the state of readiness of the oxygen sensors by supplying a bias voltage of approximately 400 - 500mVDC to the oxygen sensor. As the sensor begins to warm up, the voltage produced increases due to rich exhaust mixtures commanded by the EMS. When the EMS senses a return voltage greater than the bias voltage, the computer will command the fuel mixture lean. When the output voltage from the sensor drops below bias voltage levels, the computer will command a rich mixture again. When the EMS determines that the O2 sensor has responded properly and within a predetermined amount of time, it will begin using the sensor as an input to adjust fuel trim.
Many Oxygen sensors used in OBD 2 engine management systems incorporate heaters. These heaters raise the sensors up to operating temperature quickly. The sooner the oxygen sensor gets to operating temperature, the sooner the EMS can maintain closer control over emissions, economy and performance. The oxygen sensor provides the computer with necessary information to maintain favorable operating conditions for the catalytic converter. The role of the catalytic converter is to store oxygen for the reduction of HC, CO and NOx emissions. The oxygen sensor input is used by the EMS to protect the catalytic converter by cycling the air/fuel mixture rich and lean. This provides adequate oxygen for storage while maintaining cool enough operating temperatures to prevent catalyst damage.
In addition to controlling the converters operating conditions for emissions control, the computer uses the oxygen sensors to tailor fuel trim providing a balance between fuel economy and performance.
Abnormal sensor activity has a profound effect on pulse-width and fuel trim strategies. Sensor values that indicate lean conditions will cause the computer to command changes in short term fuel strategies. Conditions such as secondary misfires create excessive HC levels. This also produces high oxygen levels in the exhaust. The oxygen sensor will sense only the increased oxygen content and input to the computer will be below bias voltage levels. The computer will respond by commanding additional fuel.
OBD 2 vehicles use oxygen sensors downstream of the converter(s) to monitor the efficiency of the catalyst. When the catalyst performs properly, available oxygen is used resulting in low levels oxygen in the exhaust sample. While downstream oxygen sensors are constructed the same as upstream oxygen sensors, the values that they generate are different. With relatively richer mixtures present around the downstream oxygen sensor, voltage inputs to the computer will be above the 450mV bias voltage. If the catalyst is operating effectively, the downstream oxygen sensor will cycle when the catalyst is flooded with oxygen. Typical values from the downstream oxygen sensor(s) are between 550- 900mV at idle.
While the downstream oxygen sensor is used to monitor catalyst efficiency, the upstream sensor has a pronounced effect on performance. Lean oxygen sensor values will result in an increase in pulse-width, excessive emissions, surging, hesitation, and potentially catalyst damage. Additional fuel can cause the catalyst temperatures to rise due to an afterburner effect in the converter. The oxygen sensor is the only post combustion input to the EMS. Other malfunctioning systems affect its operation.
Improper rich indications will cause lean operating conditions that may result in loss of power, hesitation, surging, poor idle quality and possibly converter damage. Sensors that do not switch properly, or are lazy do not provide accurate information to allow the computer to properly maintain the air/fuel mixture. Faulty heaters do not allow the sensors to reach operating temperature fast enough and the vehicle may remain in open loop for longer periods of time. Malfunctioning heaters also allow the sensors to cool down during periods of extended idle.
A faulty oxygen sensor due to loose connections, bad grounds, high resistance in the circuit, or opens in the circuit can cause the following symptoms.
Related Symptoms
  • Surging at idle
  • Unstable idle
  • Running rough off idle
  • Hesitation
  • Stumble
  • Chuggle
  • Poor fuel economy
  • Spark knock
  • Stalling on acceleration
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Oct 15, 2010 | 2004 Acura TL

1 Answer

Where is the GEM located on a 1999 lincoln navigator


I found no topics found when entering 'GEM' on the 1999 Lincoln Navigator. What is a GEM?: Electronic Engine Controls WARNING
To avoid personal injury and/or vehicle damage, refer to the service precautions at the beginning of this section.
General Information The Engine Management System (EMS) uses several different sensors and actuators to gather and control various emissions and driveability aspects of the vehicle. These may include but are not limited to:
  • FTP - Fuel Tank Pressure Sensor
  • A/F - Air Fuel Ratio Sensor
  • CKP - Crankshaft Position Sensor
  • CMP - Camshaft Position Sensor
  • EGR Valve Position - Exhaust Gas Recirculation Valve Position Sensor
  • HO 2S - Heated Oxygen Sensor
  • IAC - Idle Air Control Valve
  • IAT - Intake Air Temperature Sensor
  • KS - Knock Sensor
  • MAF - Mass Air Flow Sensor
  • TP - Throttle Position Sensor
These sensors provide critical information to the EMS such as, barometric pressure, atmospheric pressure, intake manifold/engine vacuum, fuel tank pressures and changes as the vehicle is operated.
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Oct 15, 2010 | 1999 Lincoln Navigator

1 Answer

How do u change speed sensor cable on a 2005 chevy suburban


Speed Sensors (2 types) Removal & Installation Front To Remove:
  1. Raise and safely support the vehicle.
  2. Remove the wheel assembly.
  3. Remove the brake rotor.
  4. Remove the Wheel Speed Sensor (WSS) cable clip from the knuckle. chevy_aval15_02-04_speedsensorharness.gif

  5. Remove the WSS cable clip from the upper control arm.
  6. Remove the WSS cable clip from the frame.
  7. Remove the WSS cable electrical connector.
  8. Remove the WSS mounting bolt. CAUTION
    Carefully remove the sensor by pulling it straight out of the bore. DO NOT use a screwdriver, or other device to pry the sensor out of the bore. Prying will cause the sensor body to break off in the bore.
  9. Remove the WSS from the hub/bearing assembly.
To Install:
  1. Seal the WSS bore to prevent dirt or debris from falling into the hub.
  2. Clean the mounting surface on the hub to remove any rust or corrosion.
  3. Apply wheel bearing lubricant, GM P/N 01051344 or equivalent to the hub surface and the sensor O-ring to ease sensor installation.
  4. Install the WSS into the hub/bearing assembly.
  5. WSS sensor must be seated flat against the hub.
  6. Install the WSS mounting bolt. Tighten to 13 ft lbs (18 Nm).
  7. Install the WSS cable mounting clips.
  8. Connect the WSS cable electrical connector.
  9. Install the brake rotor.
  10. Install the wheel assembly.
  11. Verify proper operation.
Rear To Remove:
  1. Raise and safely support the vehicle.
  2. Disconnect the electrical connector. chevy_aval15_02-04_speedsensorrear.gif

  3. Remove the wheel speed sensor bolt.
  4. Remove the wheel speed sensor.
To Install:
  1. Install the wheel speed sensor using a twisting motion, until fully seated
  2. Install the wheel speed sensor retaining bolt. Tighten to 10 ft lbs (13 Nm).
  3. Connect the electrical connector.
  4. Lower the vehicle.
  5. Perform a low speed test for proper operation:
    • Start the engine and allow it to idle.
    • Verify the ABS indicator or the traction assist indicator remains illuminated.
    • If the ABS indicator or the traction assist indicator remains illuminated, DO NOT proceed to drive the vehicle until it is diagnosed and repaired. Check the wheel speed sensor electrical connector to ensure it is not damaged and is installed properly. If the lamp remains illuminated, diagnostics are required.
    • Select a smooth, dry, clean, and level road or large lot that is as free of traffic and obstacles as possible.
    • Drive the vehicle and maintain a speed of at least 16 km/h (10 mph) for at least 5 seconds.
    • Stop the vehicle and check to see if the ABS indicator or the traction assist indicator is illuminated.
    • If an indicator is illuminated, diagnostics are required.
---------------------------------------------------------------------------- Vehicle Speed Sensor Operation Vehicle Speed (VSS) Sensor(s) input is used by the EMS to determine vehicle speed. The VSS generates a signal that increases in frequency proportionate to vehicle speed. The EMS has a base frequency stored in memory for a distance of one mile. By comparing the input and stored value the EMS calculates vehicle speed.
VSS types include: photo-optic, permanent magnet generators or Hall Effect technology. The EMS may use other sensors on the vehicle such as ABS wheel speed to validate VSS operation.
VSS information is used to calculate vehicle loads including: torque converter application, cruise control, fuel cutoff/speed governance strategies, instrument panel speedometer and more.
Modified drivetrain components such as final gear sets and/or tires can alter VSS input values to the EMS. Improper signals can alter torque converter clutch (TCC) application, shift points, cruise control operation as well as many other systems relying on vehicle speed input.
Related Symptoms A faulty speed sensor due to loose connections, bad grounds, high resistance in the circuit, or opens in the circuit can cause the following symptoms.
  • Overheated transmission
  • Increased emissions
  • Poor fuel economy
  • Stalling on deceleration
  • Improper shift points
  • Cruise control inoperative

Sep 02, 2010 | 2005 Chevrolet Suburban

1 Answer

Where is the cam sensor on a 2005 dodge neon sxt 2.0


Camshaft Position Sensor-On top of engine Operation The Engine Management System (EMS) uses the camshaft position sensor to manage sequential fuel injection and as part of misfire diagnosis. The EMS constantly monitors the number of pulses on the signal circuit. The EMS compares the number of camshaft sensor reference pulses and the number of crankshaft position sensor reference pulses received. If the EMS receives an incorrect number of pulses, Diagnostic Trouble Codes (DTCs) should be stored in the EMS. Some engine management systems will then default to multi-port or "gang-fire" injector operation. The camshaft position sensor signal is required to sequence the injector operation to the proper cylinder timing. If the camshaft position sensor or circuit is faulty, most engines will start. However, the EMS misfire diagnostic will likely be affected.
The following symptoms can be caused by an intermittent wiring connections or faulty signal to the EMS.
Related Symptoms
  • Extended crank time with a cold engine
  • Intermittent rough running
  • Unstable idle
  • Bucking
  • Hesitation
  • Stumble
  • Chuggle
  • Poor fuel economy
  • Stalling on acceleration
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Aug 05, 2010 | 2005 Dodge Neon

2 Answers

I have 2002 pontiac grand am 2.2 liter. Car shut off while driving. It cranks over fine. Won't start due to no spark. Changed ignition control module crankshaft sensor and Coil packs still no cigar? No...


wow, you changed the ignition control module, crank sensor, and coil packs and no spark?

Take to an auto electric shop where they can test the wiring to see if there are any breaks between the sensors or parts you already invested in.

Can your scanner communicate with the PCM?
---
Powertrain Control Module (PCM) Operation The OBD 2 Engine Management System (EMS) computer can be a single computer comprised of several solid-state components or a multi-microcomputer device. This computer controls the functions of the EMS and performs OBD 2 diagnostic routines. These two distinct portions of the OBD 2 EMS computer function, in conjunction, with each other. The computer architecture and software design allows the OBD 2 EMS computer to adapt its operating strategies to a variety of conditions to optimize the EMS. Federal guidelines require the EMS OBD 2 computer to continuously monitor the operating conditions of the EMS. It must also record and report any system or component failure that may cause tailpipe emissions to exceed typically 1-½ times the federal test procedure.
The OBD 2 EMS computer is specifically designed to perform powertrain system management and monitoring. Regardless of the manufacturers design and implementation of operating strategies, all computers are designed and built following the same basic considerations.
All computers contain one or more microprocessor. Microprocessors are constructed of a complex arrangement of digital circuits. One microprocessor may contain upwards of 250,000 logic circuits. These are housed in a silicon-based integrated circuit (IC) no bigger than an area of approximately ¼ inch square. The microprocessor cannot perform calculations and decisions without instructions that are programmed into the computer’s memories.
IC Micro Processor One single microprocessor, called the Central Processing Unit (CPU), is dedicated to maintaining control over the entire computer. The CPU performs all of the calculations and logical decisions. Operating instructions for the CPU are preprogrammed into other memory locations and are ‘read-only’ programs. These programs are permanent and generally cannot be altered by service personnel in the field.
A program, in general, is a set of instructions arranged in a specific order to accomplish a specific task. Each instruction in the program is assigned to a specific location, or address within the computer’s memory. Only the address of where the instruction is stored is retained in the CPU. When the CPU requires information to perform a calculation, it looks for the address of the required data and then copies the data from the memory location. This copy is retrieved and temporarily retained by the CPU for processing. Retrieving programs in this manner ensures that the information programmed in memory is retained and does not change.
The following symptoms can be caused by an open, short to ground, short to power or excessive resistance in the power and ground circuits, data line communication malfunctions and /or component failure.
Related Symptoms
  • No Crank
  • No Start condition
  • No communication with scan tools
  • No communications with other modules
  • MIL lamp illumination
  • Intermittent component functions
  • Poor fuel economy
  • High emissions
  • Drivability concerns (stalling, bucking, stumble etc.)
  • Charging system malfunctions

Jun 26, 2010 | 2002 Pontiac Grand Am

1 Answer

High idle stalls at lights code for crank sensor


Crankshaft and Camshaft Position Sensors Camshaft Position Sensor Engine timing is determined from the relationship between the crankshaft and camshaft. This relationship is maintained by a timing chain or timing belt. The Engine Management System does not control engine timing but it does monitor the relative position and speed of these shafts by monitoring signals generated by sensors. The Engine Management System (EMS) uses signals generated by the camshaft position sensor to synchronize fuel injection to the valve sequence and for the on-board diagnostic procedure for misfire detection. The EMS energizes the injector at or near the time the intake valve opens. For misfire diagnosis, the EMS compares the number of camshaft sensor reference pulses and the number of crankshaft position sensor reference pulses received. If the EMS receives an incorrect number of pulses Diagnostic Trouble Codes (DTC’s) should be stored in the EMS.
If the camshaft position sensor or circuit is faulty most engines will start. Some engine management systems will then default to a pre-programmed injector firing sequence. All injectors may be energized simultaneously or all of the injectors on one bank may be energized at the same time. If the CMP data is required for misfire detection and reliable CMP data is not present misfire detection would probably be suspended.
Related Symptoms The following symptoms can be caused by an intermittent wiring connection or faulty signal to the EMS:
  • Extended crank time with a cold engine
  • Intermittent rough running
  • Unstable idle
  • Bucking
  • Hesitation
  • Stumble
  • Chuggle
  • Poor fuel economy
  • Stalling on acceleration
Crankshaft Position Sensor Engine speed is a very important input to the Engine Management System (EMS). Crankshaft speed and position are the basis for many calculations made by the computer. Crankshaft position values are transmitted to the computer by pickup coils also known as Permanent Magnet (P/M) generators, hall-effect sensors or optical sensors. The Crankshaft Position Sensor (CKP) also known as engine speed sensor is located in close proximity to the crankshaft.
In addition the EMS uses minute variations in the CKP sensor data to determine engine misfire. The EMS uses this information in conjunction with the camshaft position sensor to perform misfire diagnostics.
Related Symptoms: No Start/Intermittent Start Condition – Can be caused by a faulty crankshaft position sensor due to loose connections, bad grounds, high resistance in the circuit, or opens in the circuit

Jun 23, 2009 | 2004 Nissan Altima

1 Answer

The power steering of Elantra 2007


ELANTRA(XD) > 2001 > TCS > TRACTION CONTROL SYSTEM
C1611 EMS Time-out failure
C1617 EMS Invalid Engine Speed
ELANTRA(HD) > 2007 > ESC > ABS/ESC > C1611 CAN time-out EMS
a7381fc.jpg Seems you may have a wheel speed sensor (right front) which has come apart and is rubbing up against the 'tone wheel' on the axel shaft.

Apr 05, 2009 | 2001 Hyundai Elantra

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