cielo black smoke out with brake&batt warning lamp on

anyaddress · Post by **anyaddress** » Sat Aug 30, 2008 5:36 pm

hi nice forum

any way my car is daewoo cielo 1996 1.6 dohc with automatic transmittion
the car was working fine until i have the following problem:
- when i start the car the motor starts shaking when i give more power to the motor (rpm 3 or above) a heavy black smoke going out of the exhaust and after a while i noticed that when the rpm level is above 3 and when i increase it the battery warning lamp lit on with the brake warning lamp
steps i do:
-i changed the battery to see if any difference the same problem
-i reset the ecm by disconnection battery cables(is ther is any other way)
-i checked for air leak nothing found
-i changed the spark plugs
-finally i measured the voltage across the battery when the car is on and i noticed when i increase the motor rotation the voltage increase to 16.8v dc using digital multimeter is that's normal?

any suggestion plz

MMamdouh · Post by **MMamdouh** » Sun Aug 31, 2008 1:44 pm

could be bad O2 sensor... have you had the car scanned?

MMamdouh

anyaddress · Post by **anyaddress** » Sun Aug 31, 2008 1:51 pm

MMamdouh wrote:could be bad O2 sensor... have you had the car scanned?

MMamdouh

its possible that ,also a bad or closed injector could do that,any way i think i have amechanical problem causes the black smoke ,and electrical problem,i want to know the reason thats let brake and battery warning lamp on , i read in the manual thats maybe caued by a bad genretor bridge is thats right.alo another thing happen the car battery is completely emty after turnng off the car all the night and i think a bad alternator did this thanxx any way will try to solve first my electrical problem by changing my alternator(generato) and then scan the car

Daniel · Post by **Daniel** » Sun Aug 31, 2008 2:51 pm

reason thats let brake and battery warning lamp on , i read in the manual thats maybe caued by a bad genretor bridge is thats right

That's seems correct. The two bulbs are linked by a diode and a bad alternator could cause the two lamps to glow.

Pir0 · Post by **Pir0** » Mon Sep 01, 2008 9:59 am

Yep, what daniel said. I'm willing to bet it is your alternator. As for the black smoke, that indicates your cars running verrrryyyy rich, so it wouldnt be a closed injector, kinda, the opposite. It might not necessarily be too much fuel, it could be too little air aswell.