I have black smoke come out of my Lexus SC 400 back ,any one can help me? nothing happen at all when I take off the air sensor electric connection ,or ther any website that i can find the info to help me out ?
2007-02-26 09:58:22 · 5 answers · asked by kamikazi 1 in Cars & Transportation ➔ Car Makes ➔ Lexus
It sounds like the automatic choke (or cold start fuel enrichment valve in an injected car) is stuck. Black smoke indicates unburnt fuel... This should only be happening after it has run for a few minutes and warmed up.
The connection to the vehicle computer may be bad, not allowing the induction mixture to lean after warming up.
2007-02-26 10:04:48 · answer #1 · answered by Gordon B 4 · 0⤊ 0⤋
Black smoke from the tailpipes is indicative of your vehicle running extremely rich (too much fuel.) Any good mechanic should be able to narrow that down using typical troubleshooting techniques. More than likely a sensor has gone bad, or a connection to a sensor is loose, but that is any number of sensors or combination of sensors. Get the car scanned with a CEL (check engine light) code reader to help find the problem.
2007-02-26 10:07:29 · answer #2 · answered by Doug K 5 · 1⤊ 0⤋
6800 is in basic terms too lots for the vehicle, espically for the miles. If u do no longer ideas, attempt a Sc 3 hundred, comparable seems and each thing beside the motor. Sc 3 hundred with that kinda miles decide for 3-5k. for 6k u can get one for decrease than the 100k mark. If the vehicle is surely guard then it would run suited. bot the sc 3 hundred and four hundred has solid solid engines, i've got seen some human beings bypass over 200k miles. great vehicle the two strategies.
2016-11-26 00:52:38 · answer #3 · answered by ? 4 · 0⤊ 0⤋
your car is running to rich causing to much fuel to be burned and in turn put out black smoke if you got to any mechanic with a scan tool they should be able to make your car run more lean, and if there is a problem with a sensor or something it will be able to tell them.
2007-02-26 11:23:43 · answer #4 · answered by Anonymous · 0⤊ 0⤋
dougs right.. running rich...could be oxygen sensor or tempsensor or timing sensor..or bad injector...it needs pro testing..you dont want to guess.
2007-02-26 10:33:43 · answer #5 · answered by Anonymous · 0⤊ 0⤋