how to know if the throttle body is bad?
191238
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).
393351
['Starting issues.', 'Poor idle.', 'Failed emissions.', 'Poor Performance.', 'Engine does not reach full RPM.', 'Increased fuel consumption.', 'Rough engine performance.', 'Surging and bucking under various throttle loads.']
689973
['P0128. Coolant Thermostat (Coolant Temperature Below Thermostat. P0171. System Too Lean. P0174. ... ', 'P0300. Random/Multiple Cylinder Misfire Detected. P0401. Exhaust Gas Recirculation "A" Flow Insufficient Detected. ... ', 'P0440. Evaporative Emission System. P0442. Evaporative Emission System Leak Detected (small leak)']
692632
['Your engine has a rough idle. ... ', 'Your car has poor performance. ... ', 'You have increased fuel consumption. ... ', 'Your car frequently stalls when idling. ... ', 'You can smell fuel. ... ', 'Your engine management light stays on. ... ', 'Your car produces more emissions. ... ', 'You hear knocking noises coming from the engine.']
36808
['Slow engine crank: When you attempt to start the vehicle, the cranking of the engine is sluggish and takes longer than normal to start. ... ', 'Check engine light: The check engine light sometimes appears when your battery power is weak.']
786522
['Burning oil smell. ... ', 'Valve cover is dirty and leaking oil. ... ', 'Engine is low on oil. ... ', 'Engine is running rough and causing misfires.']
61179
['Car does not start or cannot move. ... ', 'Transmission goes into different gear than selected. ... ', 'Vehicle goes into limp mode.']
227925
['Increased exhaust smoke. If your vehicle is producing large amounts of exhaust smoke there is a good chance that some major internal damage has occurred. ... ', 'Knocking noises. ... ', 'Metal shavings spotted during oil changes. ... ', 'Lack of power. ... ', 'Spewing smoke from the hood.']
734042
['Grime Build Up. ... ', 'Poor Fuel Economy. ... ', 'Poor or High Idle. ... ', 'Uneven or Slow Acceleration. ... ', 'Electrical Problems. ... ', 'Airflow Disruptions. ... ', 'Check Engine Light. ... ', 'How to Resolve Any Problems…']
664673
['Low or dirty clutch fluid. One of the first symptoms commonly associated with a potential problem with the clutch master cylinder is low or dirty fluid in the reservoir. ... ', 'Hard to shift. Another symptom commonly associated with a bad or failing clutch master cylinder is difficulty shifting. ... ', 'Abnormal clutch pedal behavior.']
267352
My guess here would be a dirty intake manifold, throttle body and/or EGR valve. Any of these would restrict air flow and/or blow soot/carbon into the intake and come out the exhaust. It's easy to remove and clean up and if it doesn't fix the original problem then it'll still run better.
1081756
['1) Your Transmission is Slipping. ... ', '2) Your Transmission is Leaking Fluid. ... ', '3) Your Transmission Emits an Unusual Odor. ... ', '4) Your Transmission Causes Rough Idling. ... ', '5) Your Transmission Shifts Poorly. ... ', '6) Your Vehicle Accelerates Poorly. ... ', '7) Your Check Engine or Transmission Warning Light is On.']
670613
When a TPS goes bad, then the car's throttle body won't function properly. It could either stay shut or it won't close properly which is a severe issue. If it stays shut then your engine is not going receive air and it won't start.
138266
['Bumpy ride. The most obvious sign of a problem with your shocks or struts is that your car is giving you a much more uncomfortable ride than normal. ... ', 'Steering problems. ... ', 'Braking problems. ... ', 'Fluid leaks. ... ', 'Unusual tire tread wear. ... ', 'Mileage.']
147385
['1) Flickering/Dimming Lights. ... ', '2) Vehicle Stalls. ... ', '3) Battery Warning Light. ... ', '4) Chirping or Squealing Noise. ... ', '5) Dead Battery.']
384573
Engine Stalling or Misfiring Erratic engine behavior may also indicate a bad or failing ECM. A faulty computer may cause the vehicle to intermittently stall or misfire. The symptoms might come and go and not appear to have any sort of pattern to their frequency or severity.
1090669
['Start with the Service History. ... ', 'Recognise the Signs of Poor Maintenance. ... ', 'Cold Start the Car. ... ', 'Check the Colour of the Exhaust Fumes. ... ', "Assess the Car's Idle Noise and Feel. ... ", 'If in Doubt, Take an Expert Along.']