Black liquid & fuel smell coming out of exhaust?
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Black liquid & fuel smell coming out of exhaust?
Whenever I start my engine up usually once a day or 2 I notice some black **** comes out my exhaust. Kind of liquidy.When I rev it up, alot would come out then it would be gone. I thought it could be the rain but it's not cuzz it hasn't rained in a week. I just got new valve seals put in cuzz I coundn't past emissions. Now I kind of smell fuel whenever I start it up to. It used to give out alot of smoke until the seals were replaced. What could be the problem?
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Re: Black liquid & fuel smell coming out of exhaust? (roydogg)
the black **** is most likely just soot/coke from the inside of the exhaust being carried out by the condensation, this is fairly normal and i wouldnt think its much to worry about. When did you last replace your fuel filter, if its been on a while then that could be the cause of the smell of fuel from the exhaust
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Re: Black liquid & fuel smell coming out of exhaust? (roydogg)
Since you just had some work done on the head. Take a look around your injectors for leaking. Have someone else start it, while you watch them. It will usually leave a brownish resuide behind. From the motor oil used to install them....
[Modified by 88_SC_CRX_Si, 7:51 AM 7/9/2002]
[Modified by 88_SC_CRX_Si, 7:51 AM 7/9/2002]
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Re: Black liquid & fuel smell coming out of exhaust? (roydogg)
My guess would be that you are running rich. This causes you to have black soot in your exhaust, a lot more than if running under optimal A/F mixture. Normal cars will spit out water from the exhaust just from condensation inside the exhaust, but the black comes from a rich fuel mixture where you get raw fuel burning inside your hot exhaust.
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Re: Black liquid & fuel smell coming out of exhaust? (Marauder)
not to mention running really rich is going to cause your cat to clog quickly, ive been through 3 of them in 5 months
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Re: Black liquid & fuel smell coming out of exhaust? (roydogg)
I can't offer anything insightful b/c I'm still trying to figure out why my engine looks like this:
You can see how caked the carbon build-up is at my exhaust port. The build-up is about 1mm to 1.5mm thick. 75k miles on this B18C1.
Symptoms:
1.) Black soot propelled from exhaust running past 2ndary runner opening rpm ~ 5500rpm. Completely dry. No runny diarrhea until something went wrong after attempting a timing belt/water pump/ITR cam replacement.....rough idle, lots of noises, and bad #4 compression.
No valve seal leaks or blue smoke.
You might be running into the same or similar problems. Maybe you could try cleaning up the 0<SUB>2</SUB> sensor and checking the cat for clogs.
I'm hoping buying a header with reversion chambers will keep this from happening.
[Modified by IN VTEC, 7:10 PM 7/9/2002]
You can see how caked the carbon build-up is at my exhaust port. The build-up is about 1mm to 1.5mm thick. 75k miles on this B18C1.
Symptoms:
1.) Black soot propelled from exhaust running past 2ndary runner opening rpm ~ 5500rpm. Completely dry. No runny diarrhea until something went wrong after attempting a timing belt/water pump/ITR cam replacement.....rough idle, lots of noises, and bad #4 compression.
No valve seal leaks or blue smoke.
You might be running into the same or similar problems. Maybe you could try cleaning up the 0<SUB>2</SUB> sensor and checking the cat for clogs.
I'm hoping buying a header with reversion chambers will keep this from happening.
[Modified by IN VTEC, 7:10 PM 7/9/2002]
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