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Old 08-31-2011, 09:00 AM
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Low power, light black smoke on take-off

2006, automatic, 135k miles having low power and producing smoke upon take off from stop. Once the turbo starts to spool, power comes up to close to normal but still seems underwhelming. Here are the stats:
Stock- no performance parts installed.
Turbo- Rebuilt last week with new unison ring
Blue spring upgrade.
Bulletproof EGR cooler.
Magnaflow 4" turbo back.
CAC tubes all inspected and in good condition.
Intercooler tanks are in great shape.
No rough idle upon start up (thinking that rules out the injector sticking, right?)
Coolant flushed again last week with Restore, Restore + and now running DELO EC1. Silicone has been gone for quite some time.
Current software update, including resetting KAM.
No codes before or after all work.
I don't have gauges or monitor so can't tell you what the ECT and EOT delta is.
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Old 08-31-2011, 11:27 AM
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To me it sounds like a vane problem, but you said your turbo Waac just worked on though.
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Old 08-31-2011, 02:33 PM
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What color of smoke?
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Old 08-31-2011, 06:21 PM
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Quote:
Originally Posted by Term3 View Post
To me it sounds like a vane problem, but you said your turbo Waac just worked on though.
Normally, I would agree however if I roll the fuel slowly, the truck has minimal smoke and pulls "okay". It is when I try to beat the jackass in the BMW who is cutting across two lanes onto the on ramp...at those moments, stepping into it deeply, it falls on it's *** and belches black. It just seems like, if it were a gasser, it is dumping too much fuel before timing is advanced.
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Old 08-31-2011, 06:24 PM
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Originally Posted by HAM_RADIO_MAN View Post
What color of smoke?
Black. Black as hell. White truck with a right rear fenderwell that looks like it spent a lifetime getting coughed on by the Marlboro Man.
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Old 09-01-2011, 04:19 PM
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I would start by cleaning your turbo, check your CAC boots. Then look for soot on the fire wall or any evidence of an exhaust leak. Your flex joint / bellows my be leaking.
Good luck.
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Old 09-01-2011, 05:22 PM
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i had 2 trucks with black smoke on take off and the egr valve was open just about fraction of a inch.
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Old 09-01-2011, 07:39 PM
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Quote:
Originally Posted by JUGERNAUT View Post
i had 2 trucks with black smoke on take off and the egr valve was open just about fraction of a inch.

Good point. It's never a bad idea to clean the egr valve. I did mine every couple months when I had an EGR system. That might be a little extreame ,but I never had any problems with it.
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Old 09-08-2011, 06:35 AM
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Quote:
Originally Posted by HAM_RADIO_MAN View Post
Good point. It's never a bad idea to clean the egr valve. I did mine every couple months when I had an EGR system. That might be a little extreame ,but I never had any problems with it.
Thanks guys. I cleaned the EGR at the time of the Bulletproof install (recently).

I ended up taking it to a shop, letting them know that it acts like it is a cold air loss. They gave me some disturbing news: the ECT is 198 and EOT is 230, with an ambient air temp of 75deg. WTH? It had an oil cooler installed at same time as EGR, and like I said it hasn't had silicate coolant for a long time? They are letting it cool down to check the cold reading to rule out a bad sensor- they say that these trucks should be getting ECT of over 200deg when in tow/haul and moving down the highway...even then, the delta is too large. Any thoughts? And could a high EOT cause the light smoking?
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Old 09-08-2011, 07:44 AM
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Do you have a coolant filter? IMO these are a must have item.
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