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 Post subject: black smoke
Posted: Mon Apr 03, 2006 8:43 pm 
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hi guys great forum you got here.
i have an aU xr8 that is blowing out black smoke. spark plugs and leads are fine as i just took it for a service and had them changed. my exhaust has turned from chrome to black and the black smoke gets worse when i put my foot down. hope its not too expensive to fix....

thanks
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Posted: Mon Apr 03, 2006 10:41 pm 
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Black smoke usually means its running rich - a lot better than burning blue smoke, and not quite as fun as white smoke.

 

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Posted: Mon Apr 03, 2006 10:45 pm 
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yeah my ED's got the same problem, but only when u start it up and rev it. and it smells like s**t.

 

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Posted: Tue Apr 04, 2006 9:56 pm 
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First thing I'd try is to clean the MAF.

 

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Posted: Tue Apr 04, 2006 10:38 pm 
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i had problem with my eb and i changed sparg plugs and it fixed the problem

 

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Posted: Wed Apr 05, 2006 3:15 am 
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fairmont1998 wrote:
First thing I'd try is to clean the MAF.


how do i do that???


qwerty68 wrote:
i had problem with my eb and i changed sparg plugs and it fixed the problem


irridiums have already been put in about a month ago and leads checked
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Posted: Wed Apr 05, 2006 10:34 am 
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fairmont1998 wrote:
First thing I'd try is to clean the MAF.

I agree.
A prime suspect is the MAF.

 

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Posted: Wed Apr 05, 2006 10:52 am 
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How much black smoke?? And is the engine performing ok??

 

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Posted: Wed Apr 05, 2006 11:40 am 
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4.9 EF Futura wrote:
How much black smoke?? And is the engine performing ok??


at idle there isnt much at all, but at full throttle there is quite a bit
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Posted: Wed Apr 05, 2006 12:50 pm 
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O2 Sensor?

 

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Posted: Wed Apr 05, 2006 1:08 pm 
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Does sound like its running way rich... i thought maybe ECU was in limited operation strategy but this results in black smoke even at cruising speeds...

Yeah clean sensor wires in MAF.... maybe get it onto a dyno to see how rich it really is running....

 

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Posted: Wed Apr 05, 2006 10:14 pm 
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To clean the MAF take it off the airbox and carefully remove the electronics. You'll need a security Torx bit to remove the electronics. You can buy them at tool places.
Clean the two wires with carby cleaner, be gentle so they aren't damaged. I just sprayed carby cleaner on mine til it was clean, I didn't rub them or anything. Let everything dry, reassemble the MAF and refit it.

 

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