Loss of power with check engine light on

There can be several reasons for a GWM Florid Crossover hatchback to lose power while driving and display a service light on the dashboard. Some possible causes could be:

1. Fuel system issues: A clogged fuel filter, malfunctioning fuel pump, or a problem with the fuel injectors can restrict the flow of fuel to the engine, leading to a loss of power.
2. Ignition system problems: Faulty ignition coils, spark plugs, or ignition cables can result in misfires or weak spark, causing power loss.
3. Sensor malfunction: Issues with sensors like the Mass Air Flow (MAF) sensor or Oxygen (O2) sensor can disrupt the fuel-to-air ratio, resulting in decreased engine performance.
4. Exhaust system concerns: A clogged catalytic converter or restricted exhaust flow can cause a decrease in power output.
5. Electrical issues: Problems with the battery, alternator, or wiring can affect the vehicle's electrical system, leading to power loss.
6. Transmission problems: If there is a fault with the transmission, such as slipping gears or a failing clutch, it can result in a loss of power while driving.

Given the presence of the service light on the dashboard, it is recommended to have the vehicle diagnosed by a qualified mechanic or service center. They can use diagnostic equipment to read the trouble codes stored in the vehicle's computer system, which will provide more specific information about the underlying problem causing the power loss.

It sounds like there are multiple issues with your Isuzu KB 240 LE. A powerless engine and stalling can be caused by a number of issues, including:

1. Fuel Delivery: If the fuel pump is not delivering enough fuel to the engine, it can cause a loss of power and stalling.
2. Ignition System: If the spark plugs or ignition coils are not functioning properly, it can cause a loss of power and stalling.
3. Mass Air Flow Sensor: A faulty mass air flow sensor can cause the engine to run lean, resulting in a loss of power and stalling.
4. Vacuum Leaks: A vacuum leak can cause a loss of power and stalling.
5. Throttle Body: A dirty or clogged throttle body can cause a loss of power and stalling.
6. Engine Control Module: A malfunctioning engine control module can cause the engine to lose power and stall.
7. Fuel Injection System: A clogged fuel injector or a failing fuel pressure regulator can cause the engine to lose power and stall.

It's recommended to have the vehicle professionally diagnosed to determine the root cause of the problem. The diagnostic process may involve checking the fuel and ignition systems, performing a vacuum leak test, checking the throttle body, and possibly scanning the engine control module for codes. Once the issue is identified, the necessary repairs can be made to restore proper engine performance.

Hook up a professional grade scan tool to the vehicles computers an check for DTC'S diagnostic trouble codes , that will tell a professional mechanic what to check.

P0087 is Fuel Rail/System Pressure - Too Low, indicating a fuel system problem.

What causes the P0087 code?

• The most common cause is a clogged fuel screen or filter
• A failing fuel pump
• A restricted fuel line
• Improperly reading fuel pressure sensor will set P0087 as well

What are the symptoms of the P087 code?

• Check Engine Light illuminated on the dashboard
• Vehicle may run poorly
• Loss of engine power, noticed during acceleration
• Engine misfire
• Vehicle may stop running

How does a mechanic diagnose the P0087 code?

• A mechanic will begin by using a scan tool to read any codes present.
• Once these codes are identified and the freeze frame information looked at for each code they will be cleared.
• Next a road test will be performed under similar conditions as the freeze frame data.
• If the Check Engine Light comes on a visual inspection of the fuel tank, fuel lines, and fuel filter will be performed.
• Manual fuel pressure readings will then be taken at the fuel rail and compared to specifications. A scan tool will then be used to compare manual readings to what the ECM sees.
• Lastly, the fuel pump will be tested.

Common mistakes when diagnosing the P0087 code

• Mistakes are made when steps are skipped or not completed.
• Though the most common cause is a clogged fuel filter this will not fix all vehicles and circumstances.
• It is important to follow the steps so unnecessary repairs are not performed wasting time and money.

How serious is the P0087 code?

P0087 can lead to serious drivability issues. If the vehicle starts running poorly and having misfires it must be diagnosed ASAP to ensure safe driving. If the fuel pump is failing or the fuel filter becomes completely clogged, this may cause the engine to die while driving resulting in serious issues for the driver. A qualified mechanic should be contacted and repairs should be done to get the vehicle safely back onto the road.

What repairs can fix the P0087 code?

• Replacing the fuel filter or screen
• Replacing kinked fuel lines
• Removing and replacing the fuel pump
• Replacing a faulty fuel pressure sensor

Additional comments for consideration regarding the P0087 code

A manual fuel pressure tester is needed to diagnose P0087. This allows us to check fuel pressure at the fuel rail and then use the scan tool to check what the fuel pressure sensor is reading. Both of these readings are needed to test the fuel pressure sensor.
An advanced scanner is also needed to monitor fuel pressure sensor data.
Some vehicles may not be equipped with an external fuel filter. These vehicles will only be equipped with the fuel screen that is attached to the fuel pump. These are generally replaced as one unit since the gas tank must be removed from the vehicle in most cases.
Care should be taken when test driving a vehicle with a failing fuel pump. If the fuel pump is failing it may do so when driving causing the vehicle to die while driving or not be able to be restarted.

Do you have a check engine light on ? Is it cold when it runs good an then not when it warms up ? You need to have a diagnostic scan tool hooked up , check engine sensor data parameters .Have a pro diagnose it before replacing parts .ECT - engine coolant temp . sensor , mass air flow sensor , O2 sensors , also check fuel trims , if you know what those are . Fuel trims are a good diagnostic tool , is the PCM adding fuel for lean condition ., low fuel pressure ,plugged fuel filter , worn fuel pump etc... Or is the PCM subtracting fuel , leaking fuel injectors , bad fuel pressure regulator . What make , model an year vehicle ?

Are you getting a check engine light? Have you had it scanned for codes? My guess is a bad vacuum leak.

Is your check engine light on? If so did you scan your vehicle and what codes came up?

Does your scanner give you a reading for barometic pressure?

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 thefuel 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.
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 a fuel 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.
• 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 o
  

it's a coil- these are commonly going out on audi's...it happend to me. it's like you are running on 2 cylinders instead of 4- you need to get it replaced- it's about 75 bucks.