What did you do to your 15+ K2XX Tahoe/Yukon Today?

WifesYukon17

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It can contain more than just oil therefore I really don't see the benefit of analyzing anything that comes from a catch can, but I could be wrong though and would be interested to hear otherwise.




I have a Mighty Mouse Catch Can (Amazing built quality, good features, functions very well and looks top notch IMHO) on my V and depending on how many miles driven, condition of the motor, driving conditions and how big your catch can is I think that is/could be a problem. Are you sure the can is hooked up right? I have only drained mine a couple times and my car is no Daily Driver by any means but I put 6-10k on a season. Even when I drain it at the end of the season, I'm only seeing 3oz at most, if I had to guess.

Yes its installed correctly. I think it collects alot because it sees about 70% highway driving, 5 days a week. Also, because the lines are long, it gives the crank case vapor longer time to cool and it causes more of the "stuff" to collect in the can. I'm fine with it because its not all going back into the manifold and on the back of the valves.

On a side note, something I found kinda interesting. On the Yukon the collected "stuff" smells like gas and oil, extremely petroleum scented. On my F150, I have the same JLT 3.0 can but I run E85 exclusively in it. The collected "stuff" from my F150 smells almost like nothing at all. It's kinda crazy to be honest. I'm not educated enough in PCV systems to have an explanation but I did find it rather interesting. I wish I could run E85 in the Yukon.
 
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STORMIN08

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^^^ this was no intended to rebut your comment, i understood what you were saying.

i was just commenting on reuse into the engine....NOW, if it had a drain back tube, i would not have the same issues, were as a condition of hot gases warming and then engine off times cooling the oil, it may increase in moisture content.

i have / had a drain back on 3 of my Cummins powered trucks, EOA checks show no issues of this use, versus EOA without the drain back
 

sd172

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Yes its installed correctly. I think it collects alot because it sees about 70% highway driving, 5 days a week. Also, because the lines are long, it gives the crank case vapor longer time to cool and it causes more of the "stuff" to collect in the can. I'm fine with it because its not all going back into the manifold and on the back of the valves.

On a side note, something I found kinda interesting. On the Yukon the collected "stuff" smells like gas and oil, extremely petroleum scented. On my F150, I have the same JLT 3.0 can but I run E85 exclusively in it. The collected "stuff" from my F150 smells almost like nothing at all. It's kinda crazy to be honest. I'm not educated enough in PCV systems to have an explanation but I did find it rather interesting. I wish I could run E85 in the Yukon.

You actually can run E85 in your Yukon. That was exactly what I did to my Tahoe (it was not flex fuel from the factory). The only missing portion of the flex fuel system can be easily added back - e.g. the ethanol sensor:
http://www.cjtunes.com/store/flex-fuel-conversions/14plus-gm-truckssuv-flex-fuel-conversion/
I took mine to the local performance shop and had it tuned on 91 and on E85.http://www.cjtunes.com/store/flex-fuel-conversions/14plus-gm-truckssuv-flex-fuel-conversion/
 

CMoore711

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You actually can run E85 in your Yukon. That was exactly what I did to my Tahoe (it was not flex fuel from the factory). The only missing portion of the flex fuel system can be easily added back - e.g. the ethanol sensor:
http://www.cjtunes.com/store/flex-fuel-conversions/14plus-gm-truckssuv-flex-fuel-conversion/
I took mine to the local performance shop and had it tuned on 91 and on E85.

I've been looking into this a lot lately and have really been leaning towards doing it. There is a lot more information on it on the www.gm-trucks.com forum than on these boards. But the 5.3L and 6.2L are all the same for the K2XX trucks.

From what I've read it really does seem like all you need is the sensor kit you linked above and a tune to activate the sensor? There doesn't seem to be any additional upgrades needed to injectors, fuel pump, or fuel lines.

I realize E85 is consumed at a faster rate than 93 OCT premium fuel; But from the numbers I've seen if E85 is at least $0.52/gallon cheaper than the fuel you normally run you're getting a slight MPG cost advantage; PLUS it burns cleaner. PLUS it produces more power.

If you can purchase this sensor kit and add a tune for $700 +/- all-in I feel like that is a great value for up to +40 whp/+40wtq.
 

sd172

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I've been looking into this a lot lately and have really been leaning towards doing it. There is a lot more information on it on the www.gm-trucks.com forum than on these boards. But the 5.3L and 6.2L are all the same for the K2XX trucks.

From what I've read it really does seem like all you need is the sensor kit you linked above and a tune to activate the sensor? There doesn't seem to be any additional upgrades needed to injectors, fuel pump, or fuel lines.

I realize E85 is consumed at a faster rate than 93 OCT premium fuel; But from the numbers I've seen if E85 is at least $0.52/gallon cheaper than the fuel you normally run you're getting a slight MPG cost advantage; PLUS it burns cleaner. PLUS it produces more power.

If you can purchase this sensor kit and add a tune for $700 +/- all-in I feel like that is a great value for up to +40 whp/+40wtq.

All you really need is the sensor and the flex fuel tune. The high pressure fuel pump and injectors can already support it - hence you can run a supercharger on a stock cam and stock fuel system on premium gas. You will run out of fuel if you decide to do forced induction AND do E85.
 

WifesYukon17

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Also, in addition to the forum check out this channel:
https://youtube.com/user/pmoore4321
One of the videos describes how to convert your 6.2 Yukon to E85.

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How much power do you pick up running E85?

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sd172

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In the ballpark of 40 to 45. It almost started to feel like the 6.2 in terms of torque. I guess the 6.2 on E85 is even better…
 

WifesYukon17

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Nice. Lots of people don't realize the performance potential of a properly tuned flex fuel vehicle.

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