Need Advice with Cobalt SS Blow-by!! - Chevy Cobalt Forum / Cobalt Reviews / Cobalt SS / Cobalt Parts
Problems and Service Talk about any mechanical problems you are having

Closed Thread
 
LinkBack Thread Tools Display Modes
post #1 of 11 (permalink) Old 08-19-2012, 09:57 PM Thread Starter
Veteran
 
i944scania's Avatar
 
Join Date: Jul 2012
Location: New Hampshire
Posts: 563
Garage
Need Advice with Cobalt SS Blow-by!!

Hey guys,
Got a new problem with my SS supercharged.
So i recently traded in my LS for an 07 SS supercharged.
Well it was tuned poorly from the dealer for some reason.

So i got an HP tune done on it, keeping stock timing. Also did 2.9" pulley and 60 lb injectors, step colder NGK.

So it ran great at this point, also changed the intercooler pump.

But i got a check engine light after like 50 miles.

So the tuners said they would check it out and finish the HP tune on it.

Well turns out my plugs had burnt oil, meaning there most likely is blow by causing the plugs to foul.
This is causing engine misfire. It is very minor, and car still runs pretty smooth and well.
Just causes the stupid light to come on.
Luckily the dealership said if i can do a compression test and tell them the numbers for each cyl, they will replace rings.

Anyone have any input on this?? Could it be something else?? I dont think it could be anything else.

The crankcase breather also is making the intake slightlyy more oily than it should, which leads me towards oil return rings.

SH**

07 LSJ turbo swap
-to4e 50 trim .63 a/r @ 19psi
-2.5" intercooler system with zzp bov
-2.5" exhaust
-turbonetics deltagate II w/voodoo boost controller
-3" intake
-siemens #60s
-aem uego wideband afr
-HP custom tune


i944scania is offline  
Sponsored Links
Advertisement
 
post #2 of 11 (permalink) Old 08-20-2012, 09:30 PM Thread Starter
Veteran
 
i944scania's Avatar
 
Join Date: Jul 2012
Location: New Hampshire
Posts: 563
Garage
So today i did a compression test.
I figured if the oil return rings are junk, the compression rings must be too.

Well my readings ranged from 185-195 psi which is great.
I also did an oil/filter change to make sure the dealership didnt put the wrong weight oil in.


anyone know how else my plugs could be getting covered in black burnt oil??? causes cylinder misfires and check engine light. Maybe the issue will dissappear with the correct 5-30 mobile 1

07 LSJ turbo swap
-to4e 50 trim .63 a/r @ 19psi
-2.5" intercooler system with zzp bov
-2.5" exhaust
-turbonetics deltagate II w/voodoo boost controller
-3" intake
-siemens #60s
-aem uego wideband afr
-HP custom tune


i944scania is offline  
post #3 of 11 (permalink) Old 08-22-2012, 09:52 PM Thread Starter
Veteran
 
i944scania's Avatar
 
Join Date: Jul 2012
Location: New Hampshire
Posts: 563
Garage
^BUMP

any advice at all guys??

07 LSJ turbo swap
-to4e 50 trim .63 a/r @ 19psi
-2.5" intercooler system with zzp bov
-2.5" exhaust
-turbonetics deltagate II w/voodoo boost controller
-3" intake
-siemens #60s
-aem uego wideband afr
-HP custom tune


i944scania is offline  
 
post #4 of 11 (permalink) Old 08-27-2012, 11:38 AM Thread Starter
Veteran
 
i944scania's Avatar
 
Join Date: Jul 2012
Location: New Hampshire
Posts: 563
Garage
replaced fuel filter, waiting to grab a obdII scanner to reset CEL

07 LSJ turbo swap
-to4e 50 trim .63 a/r @ 19psi
-2.5" intercooler system with zzp bov
-2.5" exhaust
-turbonetics deltagate II w/voodoo boost controller
-3" intake
-siemens #60s
-aem uego wideband afr
-HP custom tune


i944scania is offline  
post #5 of 11 (permalink) Old 08-27-2012, 12:08 PM
Super Moderator
Staff Alumni
YourCobalt of the Month Winner


 
Blackbalts's Avatar
 
Join Date: Aug 2011
Location: Burnsville, Minnesota
Posts: 5,481
Garage
I wish I had advise for you bro. I'm watching this thread for your progress though.


05 Mitsubishi Evolution 8
05 Chevy Cobalt LS (RIP 7/13/2013)
99 Nissan Altima GXE (Daily)
99 Subaru Legacy (Daily)
07 Jeep Liberty Limited (No longer the tow truck for the balt )

If you have questions and I'm not on please PM, notifications go straight to my phone 24/7.

My Showoff
Join YC on FB
Syndicate of Tuners.com
Blackbalts is offline  
post #6 of 11 (permalink) Old 08-27-2012, 12:10 PM
Super Moderator
YourCobalt.com Premium Member


 
Coby7's Avatar
 
Join Date: Oct 2011
Location: Magnetic Hill, New-Brunswick
Posts: 11,820
Garage
Maybe you might want to add an oil treatment or maybe it's because of the colder plugs.

Every minute spent angry is a happy minute lost for ever and ever!!!
Drives 2016 Cocoa Buick Encore 1.4L Turbo auto KL4CJDSB2GB652675
Drives 2016 Sunset Orange Trax LT1 1.4L Turbo auto 3GNCJPSB8GL142716

Never drive faster than your guardian angel can fly
Coby7 is offline  
post #7 of 11 (permalink) Old 08-28-2012, 06:14 AM Thread Starter
Veteran
 
i944scania's Avatar
 
Join Date: Jul 2012
Location: New Hampshire
Posts: 563
Garage
thanks guys, ya the colder plugs are probably causing the issues. But, with the 60 lb/hr injectors and 15 psi of boost(2.9"), i need them so i dont detonate.

But i guess i could try some slightly hotter plugs and plug the computer in to monitor as i drive. At the moment, there is no knock at all.

Another issue is, i dont think there is anything between normal and 1 step colder plugs

07 LSJ turbo swap
-to4e 50 trim .63 a/r @ 19psi
-2.5" intercooler system with zzp bov
-2.5" exhaust
-turbonetics deltagate II w/voodoo boost controller
-3" intake
-siemens #60s
-aem uego wideband afr
-HP custom tune


i944scania is offline  
post #8 of 11 (permalink) Old 08-30-2012, 04:17 PM Thread Starter
Veteran
 
i944scania's Avatar
 
Join Date: Jul 2012
Location: New Hampshire
Posts: 563
Garage
alright guys, i bought a obdII scanner so i can diag away from the tuner.
So here is a snapshot of information when the CEL came on, and the code. I think there is sediment in the fuel rail possibly. Gunna pull it off and try to clean:

P0300 Random Misfire Detected 1/13:

Fuel Sys 1 CL
Fuel Sys 2 NA
Calc Load(%) 34.1
ECT(F) 171
STFT B1(%) 0.0
LIFT B1(%) -4.7
MAP(inHg) 18.9
Eng RPM 1902
Veh Speed(MPH) 40
Spark Adv(o) 25.0
IAT(F) 79
MAF(lb/min) 2.1
TPS(%) 34.1

07 LSJ turbo swap
-to4e 50 trim .63 a/r @ 19psi
-2.5" intercooler system with zzp bov
-2.5" exhaust
-turbonetics deltagate II w/voodoo boost controller
-3" intake
-siemens #60s
-aem uego wideband afr
-HP custom tune


i944scania is offline  
post #9 of 11 (permalink) Old 08-30-2012, 04:47 PM
Super Moderator
YourCobalt.com Premium Member


 
Coby7's Avatar
 
Join Date: Oct 2011
Location: Magnetic Hill, New-Brunswick
Posts: 11,820
Garage
I would run normal plugs. For the amount of times that you are going to be in full boost as a DD. If you plan on racing change the plugs before the race and then come back to normal plugs for daily use. It is better to detonate a little than to misfire and carbon up your chambers and cause a snowball effect.

Every minute spent angry is a happy minute lost for ever and ever!!!
Drives 2016 Cocoa Buick Encore 1.4L Turbo auto KL4CJDSB2GB652675
Drives 2016 Sunset Orange Trax LT1 1.4L Turbo auto 3GNCJPSB8GL142716

Never drive faster than your guardian angel can fly
Coby7 is offline  
post #10 of 11 (permalink) Old 08-30-2012, 05:08 PM Thread Starter
Veteran
 
i944scania's Avatar
 
Join Date: Jul 2012
Location: New Hampshire
Posts: 563
Garage
it takes a good 50 miles for the light to come back on. and now, my plugs looks pretty clear. Id just hate to get any knock. Maybe ill swap stock plugs and do a pull with the tuner and his computer. We can check for knock throughout the rpm range

07 LSJ turbo swap
-to4e 50 trim .63 a/r @ 19psi
-2.5" intercooler system with zzp bov
-2.5" exhaust
-turbonetics deltagate II w/voodoo boost controller
-3" intake
-siemens #60s
-aem uego wideband afr
-HP custom tune


i944scania is offline  
Sponsored Links
Advertisement
 
Closed Thread

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome