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L4-1.8L Turbo

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Question
How do you know if your secondary air injection system is bad?
Hi David, Generally when the secondary air pump goes bad, this will cause the motor to run rough due to the incorrect readings being generated by the oxygen sensors as well as overall lack of horsepower. This is all caused...
Question
Secondary air injection
Hi There, As you may know, the purpose of the secondary air injection system is to inject more air into the exhaust system at cold start to help light the catalyst material inside the catalytic converter quicker. The reason for...
Question
How much is the 2nd annual checkup for a 2016 a3 1.8L going to run I need oil change just hit the 15000 mile
Hi there. If you've worked with YourMechanic.com before, you should have an email address where you can contact the sales team directly to receive this price quote. It will be much easier for them to access your file this way....
Question
Loss in boost pressure.
Check the wastegate on the turbo and see if its causing the turbo to drop off the pressure. The tube from the turbo to the wastegate could be leaking and causing the pressure to be lost. If you need further...
Question
PCV hose broke, car stalled, replaced hose, car still stalling. Smell of gas (rich exhaust smell).
Hello. You do likely have a major boost leak or vacuum leak present. Volkswagen's are very sensitive to any type of vacuum leak. On Volkswagen's, even if the oil dipstick is is removed it will produce a vacuum leak cause...
Question
My car kicks up good but won't start
Hi There, This may be related to many different possibilities, some of which may be related to a lack of spark or possibly timing issues and some of which may be related to a fuel delivery problem or a combination...
Question
The car has a noise when starting and exhaust is fine it comes from the manifold, is the manifold gasket damaged need some replace
A leaking intake can make a kind of whistling noise. A helpful tool for locating an intake or exhaust leak is a piece of plastic hose. You can buy a mechanic's stethoscope and pull off the end, but you can...
Question
What does master warning light symbol mean?
Hi there. In shorty, I wouldn't recommend driving the vehicle until you've had a professional mechanic flush your coolant system and complete a warning light inspection. Windshield wiper fluid contains alcohols that can damage internal engine components if exposed and...
Question
It made a clicking noise when I lifted the clutch, I turn my engine on it starts to shake then cut out 2005 Volkswagon Golf
Hello - it's hard to say whether the noise and rough running are connected or not. First task would be to check for problem codes, whether the Check Engine light is illuminated or not. The clicking sound when you release...
Question
Loud noise from front passenger wheel
Hello, thank you for writing in. The first place you will want to start is by checking the brakes. Take a look at the pads and see if they are making contact with the rotor. There is a very small...
Question
Car want go like it should
Hi There, This can happen for a few different reasons such as low transmission fluid or a faulty control solenoid. An automatic transmission requires hydraulic pressure generated by the transmission fluid that gets pushed through a series of chambers inside...
Question
My 2003 VW GTI 1 won't start with new battery and also right after a jump and can driving it.
When your battery is low there could be a problem with the alternator or there could be a parasitic load applied to the battery. Check the alternator for any loose wires and if the alternator has a burning smell. If...
Question
Car will not turnover. Just one click when the key is turned. All electronics (radio, lights, etc.) are working.
Hi There, Generally, when turning the key produces one single click sound, this often times indicates you may have a faulty starter solenoid. A faulty starter solenoid will generally produce a clicking sound when turning the key. The starter solenoid...
Question
My audi's oil light came on lost power and a loud noise
Hi There, If your oil pressure falls below a specific level, the ECM (car's computer) will in some cases automatically shut the engine down or put the vehicle into a reduced power mode to avoid further damage to the engine....
Question
How hard is it to change a transmission range sensor on a 2005 Volkswagon Passat 1.8l Turbo
Hello - I would re-check the problem codes first. A failed transmission range sensor usually will not turn the starter unless it determines the car is in Park or Neutral. the problem is likely something else. Check fuses to be...
Question
1998 vw passat wont start or when it does wont stay on
Hi there. It appears as if you have two different problems here that are not related to each other. The hard to start problem is caused by either a damaged starter, starter relay or an ignition relay that is not...
Question
Car will not go into gear - any gear
Hi There, What you are describing sounds like possibly low transmission fluid, a bad speed sensor or potentially a faulty transmission control module, which also controls the speed sensors. The transmission control module has various sensors such as vehicle speed...
Question
My alarm isn't working. The fob lights up when pressed.
It there is anything that is not closed, like a door or trunk lid, the alarm system will not activate. Likewise, if there is a bad switch on any of the doors or the trunk, the module might think that...
Question
ABS light on, ESP light on,Traction OFF light on, engine light on, rides perfectly OBDI reads only Front Right Wheel Speed Sensor
If a faulty component is still in place, the fault codes will return almost immediately after clearing them. ABS, ESP, and traction control systems all rely on input from wheel speed sensors to determine as the name implies, the speed...
Question
Code P0455 2004 Audi A4 2.0T
Hello - a P0455 indicates a large evaporative emissions leak. This problem code originates with the evaporative emissions system purge valve, which expects positive pressure flow from the evap emissions cannister - which captures fumes from the fuel tank primarily....

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