Possible ring blowby

[donmcgowen]

Hi all,
I've had Lund trying to tune my car for 3 weeks with no success. Car just wasn't making power. I noticed a mist blowing out of my Procharger open BOV, especially when shifting at higher rpms but thought it was just air. I got a tune revision the other day and I got a #7 cylinder misfire and Lund said it wasn't tune related and I cleared and it went away. It still hasn't come back. This morning on a cold start, I noticed quite a bit of smoke puffed out of the exhaust.

After datalogging, I noticed that mist that started a couple days was all over my fender and bumper. It's definitely oil. It seems I'm getting lots of oil in my PVC pipes that connect to Procharger intake. So air is going into the Procharger with oil and going into my throttle body and much of it is blown out of the BOV.

This much oil is not normal. Now I'm worried I'm getting ring blowby and might have a bad cylinder. I'm going to do a compression test on Monday crossing my fingers this is not serious. How the hell can this happen at 11k miles. Could it be caused by bad tunes?

Any ideas my friends? I'm really hoping it's not serious. Yeah, I could use a catch can, but it just seems like lots of oil, and this wasn't always doing this.

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[Threebanger]

My experiences with FI are limited to my EB F150 but are you logging consumption on your dipstick? Which fender? Remember, a little oil goes a long way when it's thin (IE Mist) and forced induction will always produce more. Ring blow-by should get burned during the combustion cycle with NA. 'Mist' is formed in the block as by product of windage and then sucked into the intake through the PCV system. Also, I would think with FI cylinder blow by would go the opposite direction (as in forced from the cylinder into the block vs. the cylinder sucking from the block.) IF you aren't running a catch can for FI you really should think about it. Good luck on the compression test & hopefully you're just being overly paranoid like most of us.

 

[donmcgowen]

I definitely want a catch can, but I just installed Procharger. So the PCV lines run from valve covers to the Procharger intake inlet. So oil is coming from PVC to intake, going onto Procharger, gets compressed, them goes to Intercooler. But the BOV is in front of IC, so it spits out oil when it opens to release pressure. It didn't spit this much oil before never noticeable until a few days ago.

I just walked outside and see a small puddle of oil under BOV. This is making me sick. This Lund tune has been wrong from the beginning, but they always said everything was good. Now I have to deal with this shit.

 

[Threebanger]

If it's going into your intercooler and condensing with humidity from the air it'll make it look like a lot more than it is. Checking consumption on your dipstick & a compression test will definitely confirm. A puddle does seem a bit excessive but you should see how much collects in my Ecoboost catch can and my dipstick barely moves. I run Amsoil and only change it once a year.

 

[donmcgowen]

If it's going into your intercooler and condensing with humidity from the air it'll make it look like a lot more than it is. Checking consumption on your dipstick & a compression test will definitely confirm. A puddle does seem a bit excessive but you should see how much collects in my Ecoboost catch can and my dipstick barely moves. I run Amsoil and only change it once a year.

I really hope the motor is good. Guys are making 1000whp and the motor is good. But the excessive blowby just started in the last few days.

 

[Michaelrod813]

Any update to the compression test..? Im having this issue as well.

 

[donmcgowen]

I had cracked ringlands on pistons 6 and 7. I got a new tuner that got me 6 months running on 6 cylinders with Procharger. Eventually got a new short block.

Who is your tuner? And what mods do you have?

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