My issue with my 2007 Kia Amanti is that I constantly experience engine hesitation and difficulty in accelerating. Sometimes there would even be power loss while braking, especially in downhill roads. What are the possible causes of this?
Sluggish acceleration is caused by many different factors—some may be simple while others are more complex. If there's a flawed internal combustion mechanism, engine hesitation will take place. As the engine hesitates, burning of fuel burning will not be sufficient; it may also suck up too much air. These conditions make the car jerk or hesitate when accelerating, driving downhill, or changing gears. When any of this happens with your ride, the problem possibly lies with the fuel system; it may be a damaged fuel pipe or a filthy filter and/or tank. You may also want to check the fuel injectors, making sure they are clean and are still capable of functioning efficiently. Also, verify if the spark plugs and spark plug wires are clean or undamaged.
Another possible cause of poor acceleration of your Kia Amanti is a defective throttle position sensor (TPS). The TPS' main role is to send a message to the engine computer about the car's throttle position. Bucking and jerking is a common sign of a bad TPS in a Kia Amanti, thus you need to check this immediately. Take note, however, that the TPS is a very tiny car part made up of electro-magnetic sensors, so it can be very difficult to repair. Most of the time, TPS sensor replacement is advised.
My Amanti's air conditioner keeps on emitting a buzzing, vibrating sound. It gets very irritating. How do I fix this?
Air conditioning noises are commonly caused by two problems: a worn-out serpentine belt and a defective compressor. If it's a squealing sound, it is likely that the serpentine belt is the problem. However, if it is a buzzing sound like you said, there's a greater chance that the problem lies in the compressor. A buzzing noise from the compressor, especially when the air-conditioning clutch is involved, is usually a sign of overcharging and too much pressure. Buzzing happens when the coolant starts to get into the compressor. To alleviate this, try to turn off the air conditioning to stabilize the pressure and see if it will sound normal again. If it does not work, then have your air conditioning clutch fixed or replaced.
I am having problems when shifting gears. I have noticed that there is a delay when I shift from park into first gear, and sometimes, from first gear to second gear. What could be causing this kind of problem?
When you notice that there is a delay in engagement (around 1.5 seconds or more) when you shift from park to first gear, then that is a strong indicator of a transmission-based problem. It may be a sign that the system is in need of lubrication; replenishing the transmission fluid might do the trick. It could also be due to overheating. On the other hand, the problem might be caused by something more complex. It's possible that the clutches or bands that allow your Amanti to move are no longer doing their job properly. If you suspect such issue with your Amanti, have it thoroughly checked in a local mechanic shop.