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  #1  
قديم 21-10-2013, 09:03 AM
الصورة الرمزية romeoalmansour
romeoalmansour romeoalmansour غير متواجد حالياً

التخصص العملى: Engineer
هواياتي: reading and reading
 
تاريخ التسجيل: May 2013
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افتراضي What is the caused of low power engine

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__________________

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الله العظيم أعلي وأعلم





اللهُــم يا فارج الهَم, ويا كاشف الغــــم, فرّج همّــي, وفُك كربي, واغفر ذنبي , وارزقنــي من حيثُ لا احتسب
ما شاء الله تبارك الله ما شاء الله لا قوة إلا بالله , اللهم إني أسالك الهدى والتقى والعفاف والغنى
اللهم لا أضام وأنت حسبي، ولا أفتقر وأنت ربي، فأصلح لي شأني كله ولا تكلني إلى نفسي طرفة عين ولا حول ولاقوة إلابك
لا نفع للمال اذا كانت النفس فقيرة ولا ضرر من الفقر اذا كانت النفس غنية


Its easy taking it apart. But getting it back together is another story





.
رد مع اقتباس
  #2  
قديم 21-10-2013, 09:04 AM
الصورة الرمزية romeoalmansour
romeoalmansour romeoalmansour غير متواجد حالياً

التخصص العملى: Engineer
هواياتي: reading and reading
 
تاريخ التسجيل: May 2013
الموقع: cairo
المشاركات: 3,664
romeoalmansour has a reputation beyond reputeromeoalmansour has a reputation beyond reputeromeoalmansour has a reputation beyond reputeromeoalmansour has a reputation beyond reputeromeoalmansour has a reputation beyond reputeromeoalmansour has a reputation beyond reputeromeoalmansour has a reputation beyond reputeromeoalmansour has a reputation beyond reputeromeoalmansour has a reputation beyond reputeromeoalmansour has a reputation beyond reputeromeoalmansour has a reputation beyond repute
افتراضي رد: What is the caused of low power engine

منقول للافادة
__________________

............


الله العظيم أعلي وأعلم





اللهُــم يا فارج الهَم, ويا كاشف الغــــم, فرّج همّــي, وفُك كربي, واغفر ذنبي , وارزقنــي من حيثُ لا احتسب
ما شاء الله تبارك الله ما شاء الله لا قوة إلا بالله , اللهم إني أسالك الهدى والتقى والعفاف والغنى
اللهم لا أضام وأنت حسبي، ولا أفتقر وأنت ربي، فأصلح لي شأني كله ولا تكلني إلى نفسي طرفة عين ولا حول ولاقوة إلابك
لا نفع للمال اذا كانت النفس فقيرة ولا ضرر من الفقر اذا كانت النفس غنية


Its easy taking it apart. But getting it back together is another story





.
رد مع اقتباس
  #3  
قديم 21-10-2013, 09:05 AM
الصورة الرمزية romeoalmansour
romeoalmansour romeoalmansour غير متواجد حالياً

التخصص العملى: Engineer
هواياتي: reading and reading
 
تاريخ التسجيل: May 2013
الموقع: cairo
المشاركات: 3,664
romeoalmansour has a reputation beyond reputeromeoalmansour has a reputation beyond reputeromeoalmansour has a reputation beyond reputeromeoalmansour has a reputation beyond reputeromeoalmansour has a reputation beyond reputeromeoalmansour has a reputation beyond reputeromeoalmansour has a reputation beyond reputeromeoalmansour has a reputation beyond reputeromeoalmansour has a reputation beyond reputeromeoalmansour has a reputation beyond reputeromeoalmansour has a reputation beyond repute
افتراضي رد: What is the caused of low power engine

Introduction
Today's engines have been designed to have more output power and lower emissions than ever before. So when the output of your vehicles engine is compromised it is easily detected. When your vehicle has low power output it can mean several different things are occurring. You should know while your car has low performance it could be damaging components while you drive. Example: The emergency brake is on and you did not notice, this condition will burn up the rear brake pads or shoes and cause premature emergency brake failure. Or, the fuel filter is clogged causing the fuel pump to labor which can cause premature fuel pump failure. There are basically two kinds of low power conditions either the engine is running rough causing low power or the engine is running smoothly but still has low power. If the engine is running smoothly but has low power you are in the right place. If your engine is running rough causing low power please visit
__________________

............


الله العظيم أعلي وأعلم





اللهُــم يا فارج الهَم, ويا كاشف الغــــم, فرّج همّــي, وفُك كربي, واغفر ذنبي , وارزقنــي من حيثُ لا احتسب
ما شاء الله تبارك الله ما شاء الله لا قوة إلا بالله , اللهم إني أسالك الهدى والتقى والعفاف والغنى
اللهم لا أضام وأنت حسبي، ولا أفتقر وأنت ربي، فأصلح لي شأني كله ولا تكلني إلى نفسي طرفة عين ولا حول ولاقوة إلابك
لا نفع للمال اذا كانت النفس فقيرة ولا ضرر من الفقر اذا كانت النفس غنية


Its easy taking it apart. But getting it back together is another story





.
رد مع اقتباس
  #4  
قديم 21-10-2013, 09:07 AM
الصورة الرمزية romeoalmansour
romeoalmansour romeoalmansour غير متواجد حالياً

التخصص العملى: Engineer
هواياتي: reading and reading
 
تاريخ التسجيل: May 2013
الموقع: cairo
المشاركات: 3,664
romeoalmansour has a reputation beyond reputeromeoalmansour has a reputation beyond reputeromeoalmansour has a reputation beyond reputeromeoalmansour has a reputation beyond reputeromeoalmansour has a reputation beyond reputeromeoalmansour has a reputation beyond reputeromeoalmansour has a reputation beyond reputeromeoalmansour has a reputation beyond reputeromeoalmansour has a reputation beyond reputeromeoalmansour has a reputation beyond reputeromeoalmansour has a reputation beyond repute
افتراضي رد: What is the caused of low power engine

Why does my engine run rough
Car Repair Guide - READ COMPLETELY BEFORE BEGINNING
  • Step 1 - Scan for Trouble Codes - Check to see if the "service engine soon" light is on, if not continue to the next step. If the "check engine" (same thing as a service engine soon light, different manufacturers call it different things) light is illuminated you need to have the computer scanned for trouble codes. Use a simple scanner tool to retrieve trouble codes and check if they relate to the specific problem, like afuel pump circuit failure code. If a trouble code is present but does not pertain to the immediate problem like an EVAP code ignore it until a later time, after the engine is running properly. The reason we repair non-related codes after the engine is running properly is because sometime false codes can be triggered by a poorly running engine. Once the engine is running properly the code present might cycle and turn itself off. You might say "if the engine isn't running right shouldn't it have a check engine light and a trouble code?" Sometimes conditions occur that will not be detected by the computer, example: if the intake or exhaust valve operation fails the computer cannot detect the failure because the problem is not sensor related, so the engine has no power and the computer thinks everything is ok with no codes. If the trouble code retrieved relates to a low power like a Mass Air Flow (MAF) sensor or ignition coil system failure repair these problems and re-test system. If no trouble codes are present proceed to the next step


  • Step 2 - Check the Air Filter - A plugged air filter not allowing the proper amount of air into the engine. If air is not allowed to enter the engine's intake it will limit the engine power output. To check your engine air filter open the hood and remove the air filter from its housing and inspect, replace as needed and recheck
  • Step 3 - Check the Fuel Filter - Several conditions can cause low power, one of the most common reasons is a clogged fuel filter not allowing the proper amount of fuel pressure and volume into the fuel injection system. To check for this condition remove the fuel filter and drain excess fuel from the filter, next wipe any excess fuel from the filter. By blowing through the filter you can determine if the filter is clogged, you should be able to blow through it very easily. If you cannot blow through it or it is difficult replace the fuel filter with a new unit and recheck system. Some fuel filters utilize a special release tool available at our tool store: Fuel filter release tool, if the fuel filter is ok proceed to the next step
  • Step 4 - Check Fuel Pump Pressure and Pressure Regulator - Fuel pump is worn providing low fuel pressure to the fuel injection system. A fuel pump that is faltering providing low system fuel pressure/volume will cause low power. Your car's engine depends on constant fuel under pressure to supply the fuel injection system properly. Your car's fuel pump performs this action and is located in or near the gas tank. The injection system meters fuel through the injectors and into the engine. Many engine run drivability problems can be related to a weak or failing fuel pump. Problems can range from hard starting in the morning, low power and stalling while driving. Most vehicles have a fuel pressure test port somewhere on the fuel rail, use a flashlight to locate it on your engine or consult a repair manual. Also test the fuel pressure regulator performance; if the regulator is stuck or leaking the engine will not receive the additional fuel needed for power. If the fuel system pressure is ok proceed to the next step


    Fuel Injection Pressure and Pressure Regulator Test

  • Step 5 - This step is for adjustable distributor type ignition systems only. If your car has a DIS (distributor-less ignition system) skip this step. Ignition timing is very important in achieving maximum power from your engine. If the timing is adjusted too far advanced or retarded (in front or behind the timing mark) in relationship to the engine crankshaft it will have low power output. To check your engines timing adjustment a timing light is needed. Once the timing light is hooked up to the battery locate the under hood emissions sticker that has the engine timing specification and instructions. If you can't find the under hood sticker or it is illegible consult a car repair manual. If the engine timing is ok proceed to the next step. If the engine timing is way off (20 degrees or more) check the timing belt or timing chain, the crankshaft camshaft correlation might be off.


    Engine Configuration with Camshaft Operation

  • Step 6 - Checking the MAF, (mass air flow) and MAP (manifold absolute pressure) sensors. The MAF or MAP help the ECM/PCM determine how much air the engine is consuming and distributes the proper amount of fuel. If these sensors become weak they can misread and cause the ECM/PCM to think the engine is turning slower than it is, in turn giving the engine less fuel and producing less power. You might say wouldn't the computer see a problem and illuminate the service engine soon light?- MIL (malfunction inductor lamp) and the answer is not always. Thecomputer ECM/PCM is designed to detect a shorted sensor or a sensor that is way out range. If the sensor is a little off but it is still within range the service engine soon MIL will not illuminate. This test procedure is simple but unique to each car, for this you will need a repair manual

  • Step 7 - Check for severely worn or misadjusted spark plugs. Engine timing is crucial to power output, if the spark plugs are severely worn or have a misadjusted air gap the timing of the spark can be delayed or ineffective causing power loss. To check your engine's spark plugs wait until the engine is cold, then remove any spark plug and inspect. You are looking for the correct air gap between the electrodes, if the gap is incorrect remove all spark plugs and recheck. If the spark plugs are ok proceed to next step.


  • Step 8 - Check the timing belt or timing chain setting, the crankshaft and camshaft must stay in proper correlation. The procedure for checking crankshaft to camshaft correlation varies on each car. You will need to gain access to the timing belt or chain marks. Once you have gained access check your timing marks here, timing belt or timing chain setting. Correct as needed and recheck engine, if the timing correlation is correct proceed to next step
    Step 9 - Check the exhaust system for blockage. A plugged catalytic converter can cause low engine power by not allowing the engineexhaust to exit the engine properly. To check for this condition take your car for a 15 minute drive allowing the exhaust system to warm, park the car safely and use a pocket IR thermometerlaser temperature reader to measure the temperature of the exhaust pipe entering the catalytic converter and the exhaust pipe leaving. The temperature should be lower going into the catalytic converter and hotter leaving the catalytic converter, if not there may be a restriction inside the converter


    Plugged Catalytic Converter from Broken Catalyst Material

    Example: the temperature entering the catalytic converter is 300 degrees and exiting the catalytic converter is 450 degrees. This means the catalytic converter is working properly, if the temperature is the same or lower the catalytic converter is not working and is probably plugged





    Pocket IR ThermometerLaser Temperature Reader

  • Step 10 - Check the engine compression, as the engine depends on compression to ignite the fuel air mixture. If an engine has major wear is will not produce the proper amount of power. A compression test can be performed to check for wear or internal damage. A compression gauge is needed to test the engine cylinders. There are two types of gauge styles, one threads into the spark plug hole which is more accurate. The other style of gauge is designed with a rubber plug that is meant to be pressed against the spark plug hole, this style of gauge is difficult to use. Perform an engine cylinder compression test.

  • Step 11 - Sometimes the engine will have good power but it is not getting to the drive wheels. If you are driving and the engine sounds like it is working hard but the car is not going anywhere it could be the transmission clutch or clutches are slipping. When a clutch or clutches in a manual (standard) or automatic transmission wear they can slip not allowing the power from the engine to be transferred to the drive wheels. In this case the only fix is to replace the clutch or clutches depending on automatic or standard transmission. If this is not the condition continue to next step

  • Step 12 - Some cars have an ignition trigger system that bases the engine timing off of the crankshaft harmonic balancer. If this balancer comes loose it can cause the keyway in the crankshaft to dig its way into the balancer causing the timing to retard causing low power. To check for this condition remove the harmonic balancer and inspect, replace if needed and reassemble

WARNING! Always have the vehicle under inspection on level ground, in park with the emergency brake on. Always wear protective eyewear, gloves and necessary clothing before inspection or work begins. Never crank an engine over when anyone is near the battery or engine. Always have an operational fire extinguisher close by, obey all first aid instructions in the event of an injury. Never stand in front or behind a vehicle when starting or running. When engine is cranked over keep hands and clothing away from rotating components. Anyone with a heart pacemaker should not perform these tests
__________________

............


الله العظيم أعلي وأعلم





اللهُــم يا فارج الهَم, ويا كاشف الغــــم, فرّج همّــي, وفُك كربي, واغفر ذنبي , وارزقنــي من حيثُ لا احتسب
ما شاء الله تبارك الله ما شاء الله لا قوة إلا بالله , اللهم إني أسالك الهدى والتقى والعفاف والغنى
اللهم لا أضام وأنت حسبي، ولا أفتقر وأنت ربي، فأصلح لي شأني كله ولا تكلني إلى نفسي طرفة عين ولا حول ولاقوة إلابك
لا نفع للمال اذا كانت النفس فقيرة ولا ضرر من الفقر اذا كانت النفس غنية


Its easy taking it apart. But getting it back together is another story





.
رد مع اقتباس
  #5  
قديم 21-10-2013, 09:10 AM
الصورة الرمزية romeoalmansour
romeoalmansour romeoalmansour غير متواجد حالياً

التخصص العملى: Engineer
هواياتي: reading and reading
 
تاريخ التسجيل: May 2013
الموقع: cairo
المشاركات: 3,664
romeoalmansour has a reputation beyond reputeromeoalmansour has a reputation beyond reputeromeoalmansour has a reputation beyond reputeromeoalmansour has a reputation beyond reputeromeoalmansour has a reputation beyond reputeromeoalmansour has a reputation beyond reputeromeoalmansour has a reputation beyond reputeromeoalmansour has a reputation beyond reputeromeoalmansour has a reputation beyond reputeromeoalmansour has a reputation beyond reputeromeoalmansour has a reputation beyond repute
افتراضي رد: What is the caused of low power engine

هذه المقالة عجبتني قوي لان فيها معلومات قيمة جدا وحبيت انقلها للافادة
__________________

............


الله العظيم أعلي وأعلم





اللهُــم يا فارج الهَم, ويا كاشف الغــــم, فرّج همّــي, وفُك كربي, واغفر ذنبي , وارزقنــي من حيثُ لا احتسب
ما شاء الله تبارك الله ما شاء الله لا قوة إلا بالله , اللهم إني أسالك الهدى والتقى والعفاف والغنى
اللهم لا أضام وأنت حسبي، ولا أفتقر وأنت ربي، فأصلح لي شأني كله ولا تكلني إلى نفسي طرفة عين ولا حول ولاقوة إلابك
لا نفع للمال اذا كانت النفس فقيرة ولا ضرر من الفقر اذا كانت النفس غنية


Its easy taking it apart. But getting it back together is another story





.
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