C5 Tech Corvette Tech/Performance: LS1 Corvette Technical Info, Internal Engine, External Engine, Tech Topics, Basic Tech, Maintenance, How to Remove & Replace
Sponsored by:
Sponsored by:

High RPM dark smoke

Thread Tools
 
Search this Thread
 
Old 06-04-2022, 11:41 PM
  #1  
Jonpo
Advanced
Thread Starter
 
Jonpo's Avatar
 
Member Since: Apr 2021
Location: Athens, GA
Posts: 51
Received 2 Likes on 2 Posts
Default High RPM dark smoke

What do you guys think this is? The tuner said the A/F was good. The A&A Blower had a bad seal that was leaking oil into the charge pipe that was fixed before these pulls but there was probably some oil still in the manifold. I was told this is burning oil, but it seemed too dark to me. After this I found the blow off valve was stuck open and leaking boost.

Old 06-05-2022, 01:27 AM
  #2  
ThomasR
Melting Slicks
 
ThomasR's Avatar
 
Member Since: Apr 2019
Location: Clark, NJ
Posts: 2,462
Received 681 Likes on 413 Posts
Default

That looks like fuel to me.
​​​​​​
The following users liked this post:
Kubs (06-10-2022)
Old 06-05-2022, 05:26 AM
  #3  
Kingtal0n
Melting Slicks
 
Kingtal0n's Avatar
 
Member Since: Oct 2007
Location: South Florida
Posts: 3,256
Received 725 Likes on 499 Posts

Default

It does look like fuel. If the blow-off opens and you have a maf sensor it will dump fuel like crazy. Actually any perturbation will affect the maf.

You need to perform a pressure test whether maf or not, because of the boost pressure. Any air molecules leaking from the tube cause lost power. The pressure test is ALWAYS performed before I dyno a vehicle.
Old 06-05-2022, 12:53 PM
  #4  
helga203
Safety Car
 
helga203's Avatar
 
Member Since: Jul 2010
Location: chicago IL
Posts: 4,935
Received 434 Likes on 373 Posts

Default

His gauge is wrong period. That's at at least in the low 10s and mayby lower AFR. using Meth??
Old 06-08-2022, 01:59 PM
  #5  
oharal
Drifting
 
oharal's Avatar
 
Member Since: Mar 2015
Location: CSRA, SC
Posts: 1,405
Received 297 Likes on 219 Posts
Default

You need to find a new tuner if he's not aware that's unburned fuel.
Old 06-08-2022, 02:07 PM
  #6  
Jonpo
Advanced
Thread Starter
 
Jonpo's Avatar
 
Member Since: Apr 2021
Location: Athens, GA
Posts: 51
Received 2 Likes on 2 Posts
Default

Originally Posted by oharal
You need to find a new tuner if he's not aware that's unburned fuel.
That’s Vengeance Racing. Reason I went with them was their great reputation. I guess they have lost their edge.
Old 06-11-2022, 08:43 AM
  #7  
helga203
Safety Car
 
helga203's Avatar
 
Member Since: Jul 2010
Location: chicago IL
Posts: 4,935
Received 434 Likes on 373 Posts

Default

Originally Posted by Jonpo
That’s Vengeance Racing. Reason I went with them was their great reputation. I guess they have lost their edge.
Unfortunate people have bad days, and in their profession is a high risk because wen u dyno tune no warranty on engine. They will always said mechanical problems. He probably was out drinking with GRINDER lll that night. God even blacked out drunk he should of noticed that. It's mine blowing he didn't try a different gauge. That is like 2+ 2 = 5. Something looks wrong so try a calulater.WTF Lazy ******* money talks and u walk away with a fucked up tune and could toast that engine. Just because of lazyoiest or hes new.
Old 06-11-2022, 12:43 PM
  #8  
Speedy007
Melting Slicks
 
Speedy007's Avatar
 
Member Since: Mar 2018
Location: California
Posts: 2,464
Received 183 Likes on 165 Posts
Default

Possibly fuel a lot of fuel ….like way over …Secondly maybe you blew your cats apart with the extra force …
Old 06-11-2022, 01:08 PM
  #9  
Autotragic
Instructor
 
Autotragic's Avatar
 
Member Since: Sep 2020
Posts: 200
Received 76 Likes on 60 Posts
Default

When your gas car "rolls coal" and the tuner is like nah fam, it's good...I'd be ready to throttle the tuner. That's ridiculous on every level.
Old 06-11-2022, 02:43 PM
  #10  
Speedy007
Melting Slicks
 
Speedy007's Avatar
 
Member Since: Mar 2018
Location: California
Posts: 2,464
Received 183 Likes on 165 Posts
Default

Are ya burning diesel?

Get notified of new replies

To High RPM dark smoke




Quick Reply: High RPM dark smoke



All times are GMT -4. The time now is 01:44 AM.