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Small puff of black smoke on startup 

 

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 Post subject: Small puff of black smoke on startup
Posted: Tue Apr 25, 2006 7:06 pm 
Oompa Loompa
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Hi Guys

Anyone know what could cause a small puff of black smoke on startup? I recently had a new Redback exhaust system fitted to my NA BA XR6 with Pacemaker comp extractors and a hi-flo CAT, and was out the back to admire the note while a mate cranked it over. I noticed a small puff of black smoke which only came out when first started. Is this normal? Signs of it running too rich? Smoke is definitly black and not blue. Do I need to reset the ECU to adjust it to run better with the new exhaust system? Any ideas appreciated.

JB
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Posted: Tue Apr 25, 2006 7:50 pm 
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is it still doing it or is it a once off? just slightly rich on startup, no big deal...before cars get to a set temp they run a richer mixture (like a choke)...wouldnt stress about it unless it becomes a large cloud of smoke hehe

James

 

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Posted: Tue Apr 25, 2006 8:34 pm 
Oompa Loompa
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As far as I know, it always seems to do it when I have looked out the back over the last couple of weeks. Is using more fuel than I think it should and smells like it. Is this due to the exhaust upgrade?

JB
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Posted: Tue Apr 25, 2006 8:36 pm 
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my girlfriend's car was blowing black smoke because her car needed the oil changed badly.... check the oil, just in case
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Posted: Tue Apr 25, 2006 8:55 pm 
Oompa Loompa
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Oil was changed about a month ago, but it is looking darker that I think it should. I have been told in the past that oil can get dirty quickly if the engine runs rich...true??? Something about the oil becoming contaminated with too much fuel in the chamber. Sounds like a vicious circle!!!

JB
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Posted: Tue Apr 25, 2006 8:55 pm 
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A mate bought a BA ute (xls) everytime he started it, there was a puff of black smoke.


Concider it Normal!
I wouldn't worry about it... just don't look at your own car at night in the mirror if your giving it heaps... you'll never smile again!

 

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Posted: Wed Apr 26, 2006 12:56 am 
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well i know my car and most others that own e and a series prob get a black of black smoke cuas the engine computer basically dumps a lot of fuel in to help the car start
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Posted: Wed Apr 26, 2006 12:59 am 
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definitly a sign of the fuel mixture running to rich, i wouldnt neccasarly worry about it though
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Posted: Wed Apr 26, 2006 8:40 am 
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The exhaust guys f**k up the O2 sensor maybe?

 

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Posted: Wed Apr 26, 2006 7:54 pm 
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yeh check ya o2 is hooked up properly and no wires broken or anything silly like that, other than that i wouldnt worry unless your consumption gets worse!

James

 

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Posted: Wed Apr 26, 2006 10:45 pm 
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mmm Black smoke = ritch, Ritch = more fuel, More fuel = more power :D lol.

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Posted: Thu Apr 27, 2006 11:35 am 
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I think this may be something to do with high-flow cats letting through more unburnt fuel then normal cats. I have a system on my el xr and it blows a little bit of balck smoke very occasinally as well :( I took of quick the other night, and looked in my side mirror just before redline to see a puff of smoke shoot out :( Made me a very sad man to say the least, but the car's only done 136 000! I don't think it's anything to worry about though, my car uses f**k all oil. I've been behind newish (2000 model) wrxs and skylines with an exhaust system and when they've dumped it clouds of smoke have come out (even though they do probably thrash their cars all the time :P

polish'd wrote:
mmm Black smoke = ritch, Ritch = more fuel, More fuel = more power :D lol.

Cheers, DAN


Not true actually, you actually get more power from leaning out you're mixture, it just isn't very good for the engine that's all.

 

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Posted: Thu Apr 27, 2006 8:40 pm 
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take out for a good run it will do it a world of good
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Posted: Thu Apr 27, 2006 8:57 pm 
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polish'd wrote:
mmm Black smoke = ritch, Ritch = more fuel, More fuel = more power :D lol.

Cheers, DAN


Not true actually, you actually get more power from leaning out you're mixture, it just isn't very good for the engine that's all.[/quote]

Are i see, i didnt really know :? i through if you ran it a bit richer then i would go better at high revs?

 

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Posted: Thu Apr 27, 2006 8:59 pm 
Stock as a Rock
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polish'd wrote:
mmm Black smoke = ritch, Ritch = more fuel, More fuel = more power :D lol.

Cheers, DAN


Not true actually, you actually get more power from leaning out you're mixture, it just isn't very good for the engine that's all.[/quote]

Are i see, i didnt really know :? i through if you ran it a bit richer then i would go better at high revs?

 

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* 88 EA Falcon X2
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* 73 KE26 X2
* 73 KE20 x2
* 69 KE10 X2
and more

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