Poor throttle response and lack of low-end power(less thanussual) are the most common symptoms, and in worst cases, a high orwavering idle. The engine may also run hotter than ussual. It ismost easily taken care of with a bottle of fuel injector cleaner inthe fuel tank. Generally, modern unleaded fuel and air filters arehighly efficient, and these symptoms are more likely to be afailed/failing fuel injector or simply an unserviceable air/fuelfilter.
Symptoms of a Bad or Failing Throttle Body 1. Dirt, grime, and carbon deposits on the inside of the housing. Electrical problems. Vacuum leaks or an incorrectly adjusted throttle stop. Poor or high idle.
Your Chevy Trailblazer stalls out when you turn on defrost?
Classic symptoms of the Trailblazer Vortec 4200 Inline six cylinder engine with a dirty Throttle Body. www.trailvoy.com Read More
What would cause a 2003 GMC envoy to cut off when the heat is turned on?
Have you recently un hooked your battery if so your ecm module will reset to factory settings check your throttle body and clean .If your throttle body is dirty this will cause your problem .When the battery is unhooked the ecm will reset and if the the throttle body is dirty ,the heat or ac will shut engine off Read More
Can a dirty throttle body cause the car to accelerate by itself?What causes hesitation when accelerating 2006 dodge charger?Why wont my 2002 Toyota solara idle but runs fine?
Try to clean your throttle body. If you disconnect your battery or get a bad connection your throttle body will act up if it is dirty and it will not idle. Read More
What would cause engine to rev?
Damaged throttle cable, dirty throttle body, broken/damaged throttle cable return spring, vacuum leak, an obstruction around the throttle pedal such as a floor mat, Read More
What are the most common idle problems with a 1996 Mirage?
A dirty throttle body might be the problem. Or check the IAC (Idle air control). More than likely its a dirty throttle body which is not that big of a deal to get it clean. Hopefully its not the IAC. That will run you a couple of hundred dollars. Read More
Why does fuel leak into throttle body?
Assuming you have throttle body injection, you may have a faulty/dirty injector. Give us more info such as the year, make, model and engine to help us help you. Read More
What is throttle body service?
The throttle body on an engine houses the throttle, which controls the amount of fuel that enters the engine. It controls the engine's ability to maintain an idle, prevents stalling, and aids in acceleration. If the throttle body is dirty, it can cause problems with the engine running properly. During a standard service, sludge and carbon buildup out of the throttle body and off the throttle blade. The vehicle's computer is then hooked up to… Read More
1992 Saturn stalls?
dirty throttle body bad IAC sticking (worn or dirty) EGR valve something else Read More
Gmc Vehicle stall when air condition turned on?
This is probably a dirty throttle body. It should be removed and cleaned. Read More
Why does your gas pedal stick then jump?
Check inside throttle body...the throttle plate could be dirty (especially around the edges). Carefully clean with a 'sensor safe' throttle body cleaner. Don't let dirty fluid run down into the air passage to the IAC. (It's the small hole just before the butterfly). May want to plug that with a cloth before you start cleaning. Read More
What does code p1545 on 99 Audi a4 mean?
Throttle Valve Controller: Malfunction Possible Symptoms Increased Idle Speed Bucking at Load Change Possible Causes Throttle Body dirty Throttle Body Wiring faulty Throttle Body faulty Possible Solutions Clean Throttle Body Check Throttle Body Wiring Check Throttle Body Read More
Your 04 Chevy trail blazer almost stalls when you turn on ac?
This is a dirty throttle body. Very common on our trucks. Read More
What happens when throttle body is dirty?
It can cause a rough idle. And it will also cause the engine to die when coming to a stop at times. Read More
What causes the accelerator cable to stick on a 2002 sonata?
If the cable appears to be in good shape, a dirty throttle body can cause that. Read More
What are the symptoms when a fuel pump is not working?
if its carbed no fuel will squirt from the jets. if its throttle body no fuel will squirt from the injectors. Read More
What is making making my 94 Camry idle rough?
Dirty or failed idle control valve or carbon deposits in the throttle body. Read More
86 Lincoln misses going down the road has news coil and module?
Wiring, plugs, pcv valve, egr valve, throttle body dirty, map dirty, fuel filter. Read More
Why does my 1998 jeep wrangler idle fine but press the accelerator and let off and it dies?
check and see if the throttle body is dirty. i have seen this complaint several times due to a dirty throttlebody Read More
What would cause your 1995 diamante to run well in park while giving her gas and then shut off in drive?
Dirty or gummed up throttle body, get some carb cleaner and wipe out the throttle Read More
What makes the car hesitate when running?
could be bad injector,dirty throttle body,plugged converter or even a need for a tune up Read More
How do i replace the iac valve for 2000 impala?
The IAC is located on the throttle body. Simply unplug the dirty IAC and clean or replace the IAC. Read More
Car doesnt start up first try but it does second?
Most likely that the throttle body is dirty and the butterfly does not close completely when shut off. Or the maf is dirty and is not detecting air flow. Read More
Car does not move when in drive unless you press gas pedal?
Sounds like low idle which may be a vacuum leak, dirty TB (throttle body), or dirty IAC (idle air control) valve. Read More
How can you reset the computer on a 2003 Chevy Trailblazer when you have replaced the thermostat and now it is idling low when AC is on and you have been told that computer needs to be reset?
Whenever you disconnect the battery for several minutes then you will reset the PCM (computer). It sounds more like you have a dirty throttle body based on your description of the problem. If you disconnected the battery when you changed the thermostat housing (most times it is impossible to change it without removing the alternator.....that bottom bolt!!!!! dang!!!) the PCM resets. The difference is it had learned to run with a dirty throttle body. Now… Read More
Where is the Throttle Position Sensor located on a 2001 Pontiac Sunfire?
The throttle position sensor is located on the throttle body. If you follow the throttle cables to the throttle body the TPS will be on the oposite side of the throttle body as the cables attach to. Read More
Where is the throttle body sensor?
Assuming you are asking about the throttle position sensor it is mounted on the throttle body and is operated by the throttle shaft. Read More
Why Throttle body spacers do they work?
Throttle body spacers increase the air volume between the engine and the throttle body. Read More
Where is the throttle body sensor on a 95 camaro?
Located on the end of the throttle shaft on the throttle body. Read More
Where is the Throttle Positioning Sensor located on a 1997 Mercury Villager?
on the throttle body on the throttle body Read More
How do i fix a Coolant leak under the throttle body?
You will need to remove the throttle body and replace the throttle body gasket. The throttle body gasket can be purchased at most auto-parts stores. Read More
Where is throttle position sensor 2003 dodge ram?
If it is an 3.7L or 4.7L engine it is on the throttle body mounted on the side. If it is a hemi engine there are two throttle position sensors. The throttle body is electronic. There is a position sensor mounted underneath the battery hidden behind a cover. The accelerator cable goes from the gas pedal to this sensor. This sensor sends info to the PCM (powertrain control mondule). There is also another position sensor… Read More
What would cause engine hesitation in a 2004 trailblazer with a 6cyl?
Most common in these trucks is a dirty throttle body. We have removal and cleaning instructions at our forum. www.trailvoy.com Read More
2004 Envoy dies while air conditioner is running periodically?
Dirty throttle body. Clean it using our procedure on our forum. www.trailvoy.com Read More
Where can you find a throttle cable from the transmission to the throttle body on a 1992 jet ta?
The throttle cable does not go from the transmission to the throttle body. Read More
How do you know if you need a new throttle body on your 91 Chevy s-10?
Tell us what symptoms the vehicle has, that will help us help you. Read More
Why does a Pontiac sun fire keeps stalling when you stop at lights?
Possible causes, idle air control valve, dirty throttle body, egr valve clogged, major vacuum leak, maf dirty, intake restriction. Read More
Will a dirty throttle body affect gas mileage?
yep because you car is trying to use dirty air for the combustion process instead of clean air. this includes rough engine shaking, smelling gas at tailpipe also. Read More
2002 ford pick up idles fast when first stated then idles low runs good going down the road but when you stop it idles low and rough?
It could be a dirty air filter or a dirty throttle body. Read More
What causes the engine to suddenly quit with subsequent loss of all functions and all dash instrument lights come on Have replaced fuel pump and sensor but did not fix problem.?
Hows your altenator?That could be it. Its not the alternator. Its the air intake on the throttle body. If you have a newer F-150, instead of a carbeurator it has a throttle body. Take off the air intake hose from the throttle body and open the butterfly shaped flaps and spray throttle body cleaner inside the throttle body and outside the flaps. This will clean carbon deposits and buildup. Your engine will run smooth and… Read More
Where is Throttle Position Sensor on dodge ram 1500?
It is on the throttle body. It is on the throttle body. Read More
Where is the throttle position sensor 1994 ford e150 5.8?
It is located on the bottom of the throttle body. You can find the throttle body by following the two big air pipes from the air filter box, they end at the throttle body. To access the throttle position censor you must remove the throttle body. Read More
How importance it is to get the throttle body fix?Where is the throttle position sensor located at on a 2003 dodge durango?
It is on the throttle body. It is on the throttle body. Read More
Why does throttle stick on your throttle body?
Carbon build up. Clean the throttle body with a good carb cleaner. Read More
Where is the throttle plate located on a 1997 ford contour?
The throttle plate is inside the throttle body on the intake manifold. The throttle cable from the accelerator peddle is connected to the throttle plate shaft on the throttle body. If you remove the air cleaner hose at the throttle body, you will see the disc shaped plate. Read More
Where is the throttle position sensor located on your 2003 dodge ram 1500 located?
It is on the throttle body. On a 5.7L it is part of the throttle body and is not available seperatly. ON a 5.9L it is opposite the cables on the throttle body. Read More
What contributes to low idle on 94 Nissan sentra?
dirty throttle body, dirty idle air control valve, or faulty idle air control valve, plugged air filter. Check you air fitler first then take the air hose off and clean the throttle body on the inside(open the throotle by hand when doing this) putting evrything back and see. If still low your IAC valve might be bad. Read More
Where is the tps located on a dodge ram 1500 5.7 year 2003?
The TPS is part of the throttle body and is only serviced with the throttle body. The TPS is part of the throttle body and is only serviced with the throttle body. Read More
In today’s modern fuel injected cars, the throttle body is a critical piece of the air intake system that controls the amount of air flowing into the engine. The amount of air allowed in depends on how far the driver presses the accelerator pedal to the floor. As you press down on the pedal, the throttle position sensor receives a signal relative to where your foot is, ranging from all the way up (zero acceleration) to all the way down (full acceleration). This sensor relays the information to the car’s main computer — giving it constant updates as to the position of the throttle. The computer knows what to tell the fuel injection system in terms of how much more or less fuel to inject into the system based on the position of the pedal.
When this process is regulated properly, a perfect balance of air and fuel is introduced to your car’s engine, allowing it to run smoothly and perform at an optimum level. Here are 5 signs of a failing throttle body:
1.Grime Buildup
Dirt and grime can build up inside the housing, this being known as coking, and causing an interruption in air-fuel flow. As a result of not having an ordinarily smooth surface for the fuel and air to flow through, this delicate mixture is interrupted by a rough surface that causes an imbalance in the flow. Similar to dirt and grime, carbon deposits can create an uneven surface inside the walls of the throttle body, which can disrupt the atomization of the air-fuel mixture.
2. Electrical Problems
Electrical connection problems can cause inaccurate or intermittent information to be relayed to the car’s computer. As with any electrical connection, connectivity issues can cause a wide variety of unpredictable signals to be transmitted. In the case of the throttle body (and related sensor), when this happens it causes false information to be relayed to the car’s computer, resulting in faulty corrections to the air-fuel mixture. You may notice a switch into “limp-home” mode, where power to the car’s engine power is reduced and throttle operation is limited.
3. Airflow Disruptions from Vacuum Leaks or Throttle Stop
Vacuum leaks can disrupt the air-fuel flow because of an imbalanced airflow, which can cause throttle body pressure problems. The issue could also be an incorrectly adjusted throttle stop. This is a component that acts as a gate-keeper and establishes a minimum or maximum position for a throttle body plate to be opened or closed. A maladjusted stop wouldn’t allow in the correct amounts of air and fuel.
4. Poor or High Idle
When a throttle body is not functioning correctly, some noticeable characteristics may be poor or very low idle. This can include stalling when coming to a stop or very low idle after starting, or even stalling if the throttle is quickly pressed — resulting in the throttle body plate opening and closing very quickly.
In the case of a large vacuum leak, you may experience a very high idle because too much air is being allowed into the intake system. All of these symptoms will contribute to poor engine performance and, as a result, will cause your check engine light to come on.
5. Check engine light
The check engine light can indicate many issues within a car including a faulty throttle body. In more modern cars, an electronic throttle control (ETC) constantly monitors throttle body performance. Any problem detected with it will turn on the check engine light.
As a part of your regular service intervals, include the air induction service and fuel injection flush to clean out any carbon deposits and dirt. You will need to have the check engine light shut off by a qualified mechanic. This will include scanning your car’s computer system for fault codes to indicate problems with your fuel injection system and specifically throttle body components. These will give the mechanic an indicator as to what to check for and how to repair the problems.
Next StepSchedule Oil Change
Engine oil is the lifeblood of the engine. The oil resides in the oil pan, which is under the car attached to the bottom of the engine. All internal (moving) parts of the engine need to be lubricated by the engine oil. Inadequate lubrication will cause the parts to wear out faster and eventually lea... LEARN MORE
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