What to Do When the Volkswagen Tiguan's Exhaust Pipe Emits Black Smoke?
2 Answers
Possible causes for black smoke from the exhaust pipe include issues with the oxygen sensor, leading to black smoke emission, unstable idling, and shaking during acceleration. It is necessary to use a diagnostic computer to check for fault codes. If the faults cannot be cleared, the oxygen sensor may need replacement. Check whether the air flow meter and intake pressure sensor are malfunctioning. Black smoke indicates incomplete engine combustion. Given the unstable engine idling in combination with the ignition system, it is advisable to inspect the spark plugs' condition. Regular cleaning of carbon deposits inside the engine cylinders is also recommended. The air filter needs to be replaced periodically, and fuel with an octane rating of 95 or higher should be used.
Last time my Tiguan's exhaust was emitting black smoke, I was really worried and rushed it to the repair shop for a check. The mechanic said the most likely issue was a rich fuel mixture, where the fuel wasn't burning completely. Common causes include leaking fuel injectors or a dirty air filter blocking the intake, and it could also be excessive pressure from the high-pressure fuel pump. Additionally, a faulty oxygen sensor might lead to excessive fuel injection. In the end, my car was fixed by cleaning the throttle body and fuel injectors, and I also replaced the air filter. It's crucial to use regular 95-octane fuel from reputable gas stations daily, as poor-quality fuel can easily cause carbon buildup and black smoke. If the car's computer reports a fault code, it's important to check and repair it promptly to avoid damaging the catalytic converter, which would be a huge loss.
