Black smoke and loosing oil! but no oil leaks? please help, please help Options

[toyocelica08]

hey there iim new to this.my car has 118,00 miles. has catback. custom intake. and recently just did my header. i noticed i have to add about a quart a week of oil. i dont have a leak. also im blowing black smoke from my car. i have no clue. if anyone can help me out i would be real happy.

bttw its a st.

thanks

[Sinyk]

Burning oil probably. Could be your head gasket leaking, piston ring going, many possible things that can cause you to burn oil.

[95CelicaST]

Have your mechanic run a compression test and a leakdown test. This will most likely give you an idea of where the problem lies - either a bad ring(s), head gasket, or bad valve(s). Toyota is known for bad valves.

[hurley97]

Black smoke is too much fuel that was unable to completely burn off in the cylinders. If you are losing oil and you are absolutely sure there are no leaks that is most likely another issue.

But since I already told you that and you didn't believe me I don't think you'll take my word for it again I did a quick google search for you...

http://www.trustmymechanic.com/troubleshoot_smoke.htm

Black Smoke: Black smoke is caused by excess fuel that has entered the cylinder area and cannot be burned completely. Another term for excess fuel is "running rich." Poor fuel mileage is also a common complaint when black smoke comes out of the tailpipe. Black smoke out the tailpipe is the least cause for alarm. Excess fuel will usually effect engine performance, reduce fuel economy, and produce a fuel odor.

How did the fuel get into the cylinder in the first place? Some of the causes of excess fuel are a carburetor that is out of adjustment, a faulty fuel pump, a leaky fuel injector, or a faulty engine computer or computer sensor. If black smoke is present, check the engine oil as in the white smoke example to make sure excess fuel has not contaminated it. Do not start the engine if a heavy, raw fuel smell can be detected in the engine oil. Call your mechanic and advise him of what you have found.

http://www.cartechhome.com/2008/05/black-s...-from-your.html

While you are driving and you notice that black smoke is coming out from your exhaust of car then it indicates that the air fuel/ratio of your car is too rich, when your car air/fuel ratio is too rich, more gas is being burned from your car engine's combustion chambers.

http://www.associatedcontent.com/article/7...ems.html?cat=27

Black smoke is oftentimes a result of too much fuel and not enough air in the combustion chamber. In rare cases, it can be caused by weak fuel pressure causing fuel to 'drip' from injectors rather than 'spray'. It can also be caused by weak fire in the combustion chamber.

[Ryouxrs]

Black smoke is too much fuel that was unable to completely burn off in the cylinders. If you are losing oil and you are absolutely sure there are no leaks that is most likely another issue.

But since I already told you that and you didn't believe me I don't think you'll take my word for it again I did a quick google search for you...

http://www.trustmymechanic.com/troubleshoot_smoke.htm

Black Smoke: Black smoke is caused by excess fuel that has entered the cylinder area and cannot be burned completely. Another term for excess fuel is "running rich." Poor fuel mileage is also a common complaint when black smoke comes out of the tailpipe. Black smoke out the tailpipe is the least cause for alarm. Excess fuel will usually effect engine performance, reduce fuel economy, and produce a fuel odor.

How did the fuel get into the cylinder in the first place? Some of the causes of excess fuel are a carburetor that is out of adjustment, a faulty fuel pump, a leaky fuel injector, or a faulty engine computer or computer sensor. If black smoke is present, check the engine oil as in the white smoke example to make sure excess fuel has not contaminated it. Do not start the engine if a heavy, raw fuel smell can be detected in the engine oil. Call your mechanic and advise him of what you have found.

http://www.cartechhome.com/2008/05/black-s...-from-your.html

While you are driving and you notice that black smoke is coming out from your exhaust of car then it indicates that the air fuel/ratio of your car is too rich, when your car air/fuel ratio is too rich, more gas is being burned from your car engine's combustion chambers.

http://www.associatedcontent.com/article/7...ems.html?cat=27

Black smoke is oftentimes a result of too much fuel and not enough air in the combustion chamber. In rare cases, it can be caused by weak fuel pressure causing fuel to 'drip' from injectors rather than 'spray'. It can also be caused by weak fire in the combustion chamber.

X2 on this. your loosing oil is a diff. issue. as said above have a compression and leakdown test done, u have an internal leak somewere,

[Aysilon]

Hi,

I have the similar problem, without the black smoke. I found that i have an oil leak on hose that goes from engine to the oil coller in front. I don't know if you have the same problem but maybe you should check it, just in case.

[95CelicaST]

I don't think USDM Celicas came with oil coolers.

[GriffGirl]

I don't think USDM Celicas came with oil coolers.

Last I checked Slovania isn't in the US, unless it's another one of those weird Texas anomalies. Maybe if Texas secedes they'll take Slovania with them?

As for an oil cooler, I'm guessing (I haven't checked your profile) that you're not running a stock motor in your '97 ST? Or it's a language barrier, and it's not really an oil cooler you're thinking of, but an oil pump?


95C- duh. I just got it anyway. So I'm leaving my smartass comment posted, with the caveat that you know that I know what you knew.

[JDM_Factory]

x2 on what Hurley said

[6G96GT]

Black smoke is absolutely running rich as stated above. I had it happen to a talon tsi I owned, ran rich at launch and blew black clouds (bad tuning).

I agree 100% that you're burning oil instead of leaking it and as stated a compression test on the cylinders would help and a wet or leak down comp test would help even more (as stated).

This post has been edited by 6G96GT: Apr 16, 2009 - 8:40 PM

[Aysilon]

I don't think USDM Celicas came with oil coolers.

Last I checked Slovania isn't in the US, unless it's another one of those weird Texas anomalies. Maybe if Texas secedes they'll take Slovania with them?

As for an oil cooler, I'm guessing (I haven't checked your profile) that you're not running a stock motor in your '97 ST? Or it's a language barrier, and it's not really an oil cooler you're thinking of, but an oil pump?


95C- duh. I just got it anyway. So I'm leaving my smartass comment posted, with the caveat that you know that I know what you knew.

I 'm runing the stock motor. I can send you my VIN number and you can check it in Toyota EPC. Im from Slovenia not from Slovania. I don't know if US cars are diffrent than EU cars. I'm just trying to help.