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Old 10-10-2008, 10:26 PM   #1 (permalink)
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Black gunk coming from exhaust

I have a 2000 prelude and recently i have been having black gunk, probably oil, coming from my exhaust and sticking to my bumper like little dots. It especially does it at high RPMs. Does anyone know what the problem is and how much it would take to fix it?
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Old 10-10-2008, 10:34 PM   #2 (permalink)
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Old 10-10-2008, 11:18 PM   #3 (permalink)
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dontcha kno? preludes love to crap all over the road.
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Old 10-10-2008, 11:26 PM   #4 (permalink)
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That isn't oil. Nice carbon, unburnt fuel, water mixture.
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Old 10-11-2008, 08:45 AM   #5 (permalink)
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Is there anything i can do about it or is it a lost cause?
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Old 10-11-2008, 10:17 AM   #6 (permalink)
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Save money buy hondata tune your engine.
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Old 10-11-2008, 12:53 PM   #7 (permalink)
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Hondata would be over kill imho. Unless he's going F/I or some other extreme setup I don't see the point.

If he's staying stock or close to it maybe buying a cheap VAFC and having some one tune it would be much cheaper and you won't have to worry about "the man" saying that your car isn't street legal (emissions test).

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Old 10-11-2008, 01:38 PM   #8 (permalink)
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Hondata would be over kill imho. Unless he's going F/I or some other extreme setup I don't see the point.

If he's staying stock or close to it maybe buying a cheap VAFC and having some one tune it would be much cheaper and you won't have to worry about "the man" saying that your car isn't street legal (emissions test).

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Hondata will get him about 2X the gains of VAFC. We're only talking about 10 - 20 whp depending on lots of factors, but he'd be better off with neptune, hondata, etc.

One thing to help your issue is maintenance. Make sure the ignition components are nice and new.
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Old 10-11-2008, 02:21 PM   #9 (permalink)
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I'm not arguing on which is the better performing solution.

VAFCs can be found for less than $100 (I've seen them for $75). He wasn't asking which will give him better performance, he was asking is there was a solution for the build up on the bumper and I figured I give him the cheapest that'll work.

He also wont have to play the swap game when going for emissions testing.

Again, just my humble opinion.

I think your idea of checking the ignition components is a very good one. x2 to that.
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Old 10-11-2008, 04:14 PM   #10 (permalink)
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yea i am just looking for a quick fix for now so i dont have to wash my car every 3 days, not performance, so what do you guys recomend?
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Old 10-11-2008, 04:23 PM   #11 (permalink)
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I'm not arguing on which is the better performing solution.

VAFCs can be found for less than $100 (I've seen them for $75). He wasn't asking which will give him better performance, he was asking is there was a solution for the build up on the bumper and I figured I give him the cheapest that'll work.

He also wont have to play the swap game when going for emissions testing.

Again, just my humble opinion.

I think your idea of checking the ignition components is a very good one. x2 to that.
Either way you still are going to spend $300 - $500 on proper dyno tuning.
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Old 10-12-2008, 02:29 PM   #12 (permalink)
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so i should be buying something like this then?

Skunk2 Field SFC-VTec & Fuel Controller [SNK-201-99-0055] EDO Performance

it is a vtec controller too do these actually work good?
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Old 10-12-2008, 02:55 PM   #13 (permalink)
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My recommendation was a VAFC.

The one you linked requires you to convert to OBD-1, which will require swapping back to the OEM OBD-2 come inspection time. Unless you live in a state that doesn't inspect.

You'll need to get some one to tune your car (not something you should attempt unless you know what you're doing). Tuning will cost more than the VAFC.

Solid's advice is good. I'd do that before doing anything else.
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Old 10-12-2008, 03:35 PM   #14 (permalink)
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One thing to help your issue is maintenance. Make sure the ignition components are nice and new.
Absolutely do the above as step 1, then check air filter - replace as necessary.
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Old 10-17-2008, 10:50 PM   #15 (permalink)
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i brought my car in to a mechanic i know and he said that if i replace the o2 sensors it should solve the problem because my car is running rich. does this seem right?
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Old 11-19-2008, 10:59 PM   #16 (permalink)
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mine does the same thing but only after straight piping the cat.. i used a snap on diagnostic on it to check a/f ratio on the o2 and it was fine .....
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Old 11-21-2008, 10:23 AM   #17 (permalink)
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yea mine is doing the exact same thing, it only does it when my performance exhaust is on and not with my stock muffler. I took it to honda and they said it is most likely a piston ring which means that the whole engine has to be pretty much rebuilt. They said there is no long term effects so they recommended to just save my money and wash my car more haha
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Old 11-21-2008, 11:16 PM   #18 (permalink)
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I have that stuff all over my rear bumper all the time. My H22A burns a lot of oil though. I always have to throw some in. And when I hit vtec, its smokes. I say check your oil just in case.
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