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Sluggish,stalls when accelerating,loss of power. has new exhaust system,fuel filter,and fuel pressure sensor.can someone help me

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  • Chevrolet Master
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Check to see if this age vehicle has a maass air flow sensor in the air intake pipe??

Posted on Dec 31, 2010

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Nothing happens when I press the accelerator pedal on my 2004 2.5 Kia Sorento


There are many reasons why a car will not move when you step on the gas pedal and they vary from easily corrected to requiring a laborious repair. A lack of power often involves the fuel system in one way or another. It could be something as simple as an engaged emergency brake or as complicated as internal engine malfunctions.
A car that runs rough, is sluggish, or frequently stalls is dangerous. The first thing to do is ensure the emergency brake is disengaged. If the emergency brake has been eliminated as the problem, a mechanic is needed to diagnose the acceleration problem.
Common reasons for this to happen: Acceleration issues typically stem from one of the following conditions:
  • Emergency break is on or stuck: This is actually one of the most common reasons that a car will not move or seems to be experiencing poor acceleration. The brake may be on simply because the driver forgot to disengage it, or it may be stuck.
An emergency brake can become stuck if it is left on for a long period of time or if it was applied with more force than usual. In regions that use salt for de-icing, or when the emergency brake has gone without use for a long period of time, releasing the brake may require the assistance of a professional mechanic.
  • Engine management issues: Many sensors interact with the engine control module to add the correct amount of fuel based on the amount of air that is coming into the engine.
As the engine management system wears, you may notice poor idle quality, stalling, and poor fuel economy. A car may run for months with a malfunctioning sensor, but eventually the problem may progress to a stalling condition or a serious lack of power.
A Check Engine light will normally be observed as well.
  • Low fuel pressure: A fuel pump moves fuel from the fuel tank, through the fuel filter, and to the engine to be burned in the engine cylinders. If the fuel pump or filter begins to fail, lower than specified fuel pressure may cause various symptoms.
Symptoms of a failing fuel pump or clogged fuel filter may include sputtering, hesitation during acceleration, power loss when the car is under load, and finally an engine that will not start. Proper maintenance, including replacing the fuel filter as scheduled, will help prolong the service life of the fuel pump and maintain proper fuel pressure.
  • Gross intake manifold leak: While this is not a common occurrence, a manifold leak does happen. This will cause the manifold to draw additional air via the leak, putting too much air into the cylinders and decreasing the amount of gasoline that is delivered in relation to air.
The engine will run rough and sluggish under such conditions. As the situation gets worse, it may eventually cause the car to stall. A hissing sound or Check Engine light may be observed as well.
  • Malfunctioning electronic throttle control: Most late-model vehicles utilize an electronically controlled throttle to control airflow into the engine. This system relies on multiple electronic inputs, computers, and motors to control engine speed. If the system detects a malfunction, the computer will usually shut down the throttle opening as a precaution. In this case, multiple error codes will be logged, a Check Engine light may be displayed, and the vehicle may not exceed 35 to 40 mph.

Dec 08, 2016 | Kia Cars & Trucks

1 Answer

My 2004 Pontiac aztek runs great unless you have to go up a hill or pass someone on the highway. Three different mechanics including the dealership can't figure this out. When u accelerate more than...


Loss of power at highway speed is usually clogged fuel filter or clogged air filter. Checking fuel pressure won't tell you if the filter is clogging up. You can still have pressure, just no volume. Air filters can do the same, except it will usually die or stumble coming to stops. The abs and disable light won't affect the engine performance. Hopefully you have a bad wheel sensor that is also disabling the AWD. The sensor is around $100 the actuator for the AWD is over $300

Aug 03, 2014 | Cars & Trucks

2 Answers

Sluggish Acceleration


A high mileage vehicle usually suffers from any number of maintenance related deficiencies. I would address the Fuel filter maintenance first. It's the cheapest and easiest of the solutions. Lack of fuel pressure under higher demand due to acceleration will result in a sluggish engine. The engine would idle fine and even run fine at high speed but would be sluggish under acceleration. Other more complecated solutions would be worn Ignition coils, Worn spark plugs, Timing belt stretched or jumped timing and the most expensive would be loss of compression in the cyllinders.

Apr 14, 2014 | 2006 Chrysler Town & Country

1 Answer

86 el camino stalls under load


As mentioned above, engine could be starving for fuel; but
also consider ignition system - as engine makes more power, maximum cylinder pressures increase. A higher spark voltage is then needed to ignite mixture (at a few degrees before top dead center... top of piston travel).
If coil is weak, plugs fouled, or plug gap too wide, adequate spark may not occur. This may cause missing,
loss of power, sometimes backfiring (backfiring may occur if timing is off, or intake valve leaky, also). If you replace the fuel filter, 'kit' the carb, but problem remains,
look to ignition system.

Diagnostic process - put a fuel pressure gauge in line, where fuel line enters carb. Rig so can see gauge, while driving. Have a passenger watch fuel pressure as you drive; especially while accelerating. If fuel pressure drops during acceleration, then its either fuel pump or filter. If pressure remains stable, consider carb issue.
If possible, test with exhaust gas analyzer, while engine
under load (possibly at an emissions test place). If lean under acceleration, its a carb problem. If not, look at
ignition system (emission test diagnostics should help here, also). Oh, and one thing I did once.... forgot to release parking brake..... duh.

Best of luck !

Dec 28, 2012 | 1986 Chevrolet El Camino

1 Answer

2001 S10 4.3 vortec 4x4. 230k Fuel pump and filter changed about a year ago. Plugs and wires change 6 months ago. The truck is very sluggish when accelerating, to the point where if I continue to depress...


it could need a fuel injector cleaning or replacement if an injector has a problem.check the air filter as i`v seen them so plugged to cause this type of problem.there could also be a problem with the throttle position sensor(tps)not sensing the proper voltage increase when moving the throttle.i guess you installed a new fuel pump not a used pump but sometimes even a new pump is defective and the fuel pressure and volume should be checked.it`s also possible the catalytic converter is plugging up and needs to have the exhaust back pressure checked.at idle the pressure should be less than 1lb pressure and at 2,000 rpm`s should be less then 2.how dirty was the filter when it was replaced it could need changing again if there is alot of dirt in the fuel system.

Apr 01, 2011 | 2001 Chevrolet S-10

2 Answers

Have 1995 jeep cherokee v6 4,0 my jeep run sluggish loss of power cant get over 65 mph service engine light on took it to auto parts to get code read low fuel intake somebody told me also to start it 3...


get the fuel and air filters checked, if the're good get the pressure tested. this ethanol **** in our gas causes a number of problems in older vehicles including dissolving rubber hoses in the gas tank. it also causes water to form in your tank and goes bad 2-3 times faster than regular gas. could also be a clogged catalytic converter. never heard of a low fuel intake code, the guy scanning your computer also has to know what he's doing to read it right.

Jan 09, 2011 | 1995 Jeep Cherokee

1 Answer

89 k1500 Sluggish acceleration when warm


Sounds like fuel pressure. 44 is lean exhaust and 43 is knock sensor circuit. The engine can knock if it is lean. Try the filter first. Also check fuel pressure if you have a gauge.

Jun 28, 2009 | 1989 GMC K1500

3 Answers

2000 ford explorer 4.0 x-engine is stalling, missing and lose power while driving


I personally would check the fuel pressure. Then I would go back to the coil. I have seen brand new bad coils out of the box. The symptoms of a loss of power point to this component, especially if the car idles well, but loses power when accelerating. Please do not rate this reply - we all are left to grasp at straws since you have changed pretty much everything. Good Luck. Please post the final fix of the problem.

Oct 15, 2008 | 2000 Ford Explorer

3 Answers

HOW TO CHANGE THE FUEL FILTER AND WHAT KIND OF PROBLEMS WOULD THE FUEL FILTER BE CAUSING?


The fuel filter is tucked away inside the frame, located on the drivers side, right about the middle of the door. If you crawl under the truck, looking up, you will see the fliter hidden neatly behind the beam of the frame. Its very easy to take off. Buy a new filter before you take the old one off, and you will then know what to look for. Hope this helps.

Aug 04, 2008 | 1999 Chevrolet Silverado 1500

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