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Jan 2, 2009 | 04:35 PM

Steelheader87

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Mountain Pass

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6.9 question

I am not getting any black smoke under a hard acceleration. Should I consider turning the fuel up? I am not looking to be pouring smoke, but would like optimum performance. Thanks for your input

Jan 2, 2009 | 04:41 PM

RCrawler

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From: Southern Oregon USA

You could probably turn it up a flat. Does it run properly and have decent power?
If it does, I would leave it alone. Black smoke is just wasted fuel.

Jason

Jan 2, 2009 | 04:48 PM

Steelheader87

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Mountain Pass

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It seems to running fine, but I am new to the 6.9 and diesel all together. I just thought I would have more power. I have Banks Sidewinder, 4'' exhaust all the way back, seems to be a good set up. I just don't know much about these motors. Thanks for your help.

Jan 2, 2009 | 05:31 PM

David85

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From: Campbell River, B.C.

The bigger exhaust probably does give you some more room for fuel. If you want, you could probably do as RCrawler says but a pyrometer is still a good idea.

Jan 2, 2009 | 08:20 PM

Steelheader87

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Mountain Pass

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Thanks for the input guys. I do have a pyrometer, so not too worried about getting too hot. I am not sure what the previous owner did, but am thinking that turning the fuel up will make a big difference. By doing this, am I going to drastically lose mpg? Thanks again.

Jan 2, 2009 | 08:25 PM

starmilt

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From: Faibanks Ak.

If you turn your pump up the fuel is available the loss in mileage is up to your right foot.

Jan 2, 2009 | 08:37 PM

Steelheader87

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Mountain Pass

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That is what I assumed, thanks for the responses. I think I am going to turn it up and see if there is a difference.

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Jan 3, 2009 | 08:26 AM

Steelheader87

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Mountain Pass

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Hey S.P., I bought the pickup already with the exhaust, so am of no help to you.

Jan 3, 2009 | 12:45 PM

#10

Dave Sponaugle

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From: Nutter Fort, WV

What numbers are you seeing on the pyrometer and where is the thermocouple located?

Jan 3, 2009 | 06:18 PM

#11

Steelheader87

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Mountain Pass

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I have not let the pyrometer go over 950, it is located on the passenger side, on the bottom exhaust that comes out of the turbo. It is the flattened pipe that is crammed under there. I hope that makes sense. Thanks for the help.

Jan 3, 2009 | 09:34 PM

#12

Dave Sponaugle

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From: Nutter Fort, WV

Yes 950 is as hot as you want it to get with the pyrometer after the turbo.

That would be about the same as 1250 in the exhaust manifold.

Probably should not hold 950 for very long, that is about the temp piston damage starts at.