CXL 2.0 Turbo Spark Knock - Buick Regal Forum : 2011 Buick Regal Forums
Reply
 
LinkBack Thread Tools
post #1 of 17 (permalink) Old 06-02-2011, 09:01 PM Thread Starter
Junior Member
 
Join Date: Jun 2011
Posts: 4
CXL 2.0 Turbo Spark Knock

Just as the title says I am getting pinging on light acceleration.
The manual says Regular fuel is ok, but I am wondering if Premium is the answer?
I had the ECM re-flashed today didn't make any difference.

Dave
Dave427 is offline  
Sponsored Links
Advertisement
 
post #2 of 17 (permalink) Old 06-04-2011, 11:41 AM
Junior Member
 
Join Date: Jan 2011
Location: Indianapolis, IN
Posts: 3
Spark Knock


If the vehicle has the 2.0L L4 engine
(VIN Code V), use premium
unleaded gasoline with a posted
octane rating of 91 or higher.
You can also use regular unleaded
gasoline rated at 87 octane or
higher, but the vehicle's acceleration
could be slightly reduced, and a
slight audible knocking noise,
commonly referred to as spark
knock, might be heard.This is from the manual on page 9-45 .
Hope this answers your question... I only use Premium and have had no problems with knock...
carnut is offline  
post #3 of 17 (permalink) Old 06-06-2011, 09:33 PM Thread Starter
Junior Member
 
Join Date: Jun 2011
Posts: 4
Quote:
Originally Posted by carnut View Post

If the vehicle has the 2.0L L4 engine
(VIN Code V), use premium
unleaded gasoline with a posted
octane rating of 91 or higher.
You can also use regular unleaded
gasoline rated at 87 octane or
higher, but the vehicle's acceleration
could be slightly reduced, and a
slight audible knocking noise,
commonly referred to as spark
knock, might be heard.This is from the manual on page 9-45 .
Hope this answers your question... I only use Premium and have had no problems with knock...
Thank you for the insight.
As usual the sales people want to sell the car, even when I asked the simple question before ordering will this thing run a regular fuel ok?

Dave
Dave427 is offline  
 
post #4 of 17 (permalink) Old 06-10-2011, 03:12 PM
Junior Member
 
Join Date: Jun 2011
Posts: 4
I too have notice the slight knock under light acceleration. Well it was nice dream filling the tank with reg unleaded for one month. Back to premium
leroyk is offline  
post #5 of 17 (permalink) Old 06-16-2011, 05:27 PM
Senior Member
 
Join Date: Mar 2011
Posts: 115
I guess it could run on regular but having the knock and your motor mis-firing inst healthy as all so i would just stick with premium fuel and just have a healthier motor!
royal_regal is offline  
post #6 of 17 (permalink) Old 06-22-2011, 01:23 PM
Junior Member
 
Join Date: May 2011
Posts: 3
I'm going to use one tank on Premium and then a tank of 87 and see what happens. I only have 2200km on it.
DeanPM is offline  
post #7 of 17 (permalink) Old 06-26-2011, 09:32 AM
Junior Member
 
Quicksilver's Avatar
 
Join Date: Apr 2011
Location: Austin, TX
Posts: 7
I just rolled over 5K mi and have not had any problems with spark knock. I have experimented with 87 and higher octane and have not seen any notable difference in performance, so I have stuck with 87.

2011 Regal Turbo
2009 G8 GT
Quicksilver is offline  
post #8 of 17 (permalink) Old 08-04-2011, 01:24 PM
Junior Member
 
Join Date: Aug 2011
Location: Automotive Capital of the World
Posts: 4
dont let the flex fuel badge fool you - that doesnt mean you can throw whatever you want into the tank.

e85, while inefficient and impotent, actually has a high octane rating so it wont produce knock. while you can get better performance from regular or midgrade than e85 youre still prone to engine knock. i dont think its too common to experience engine knock when putting reg into your 2.0L turbo but i just use premium to be safe and get the most out of the engine.
motorcityregalturbo is offline  
post #9 of 17 (permalink) Old 09-11-2011, 08:20 PM
Junior Member
 
Join Date: Sep 2011
Location: Toronto
Posts: 4
Still on my first tank of gas from the dealer...I hear the knock under light acceleration... I've put in a few top ups with Premium but I can still hear it.

I'm going to burn it all off and put in full tank of Shell 91.

Has anyone tried 89? does it still knock?

What is the difference in fuel economy between the octanes?
thetoys is offline  
post #10 of 17 (permalink) Old 10-03-2011, 04:22 PM
Junior Member
 
Join Date: Aug 2011
Posts: 9
I have tried 93, 89 and 87 over 2500 miles. The car runs like shit on 87 so I run 89 and it feels the same as when I run 93. So 89 is it for me.
Turbogirl is offline  
post #11 of 17 (permalink) Old 01-24-2012, 07:11 PM
Junior Member
 
TKR7's Avatar
 
Join Date: Jan 2012
Location: Ashland, Oh
Posts: 25
No Knock

Only have 700 miles on my T06. Haven't noticed a knock, but since I brought it home from the dealer with a full tank of gas (regular I'm guessing), I've been topping of with 89 just to be safe. Hate to go to premium on a regular basis if I don't have to. Don't really drive the car that hard....yet.

2011 T06 (Rüsselsheim)
TKR7 is offline  
post #12 of 17 (permalink) Old 01-24-2012, 10:04 PM
Member
 
Join Date: Oct 2011
Location: Mesquite, TX
Posts: 97
Send a message via Yahoo to bpwilmoth
I've got over 5k on my T05. The dealer told me to run regular, so I did for a month, then found posts here about running super. My car runs a lot better on super.

Bryan Wilmoth
2011 Regal CXL Turbo
Trifecta Tune
T05, 20% Rear 30% Front Tint
MTX Re-Q Processor with Kenwood KAC 7204 Amp powering a Sundown Audio E-10 Subwoofer in a 1.1 cu/ft vented enclosure
bpwilmoth is offline  
post #13 of 17 (permalink) Old 01-27-2012, 02:03 PM
Senior Member
 
Join Date: Mar 2011
Posts: 115
That interesting from the OP who is getting a knock! and the guy running e85 as well!, well i guess just stick with whatever your dealer is telling you to run.
royal_regal is offline  
post #14 of 17 (permalink) Old 02-03-2012, 05:18 PM
Junior Member
 
Join Date: Feb 2012
Location: Indiana
Posts: 6
It actually isn't a mis-fire it is the fuel detonating before the engine is in the right position as far as timing goes. Basically the spark plugs are not what is igniting the fuel. When this happens the engine will retard the timing. The biggest danger is to the head gasket. Too much detonation will cause the head gasket to blow.

The first thing you should try is some fuel treatment. If you have a carbon build up inside the cylinder it may remain hot enough to ignite the fuel. I am able to run 87 octane fuel in our 2011 Regal but I only by gas from certain gas stations. I tend to stay away from the old run down stations just because if the the building and pumps are old the tanks will probably be old and leaking as well. You wouldn't eat at a old run down restaurant would you?

E85 will take care of this but you will lose fuel economy and it is harder to find is some areas. Another fix is to run fuel with higher octane or get a methanol/alcohol or water injection system. I run a alkycontrol system on my Grand National. This allows me to run 24psi of boost with out the knock. Without the methanol the car will only handle 18psi. In the older Turbo Regals we run a 160 degree thermostat to help keep the engine temps down and that is why Buick has the newer ones running at 185 degrees. We have found in the older Regals that they have less knock and make more power between 160 and 180 degrees.

Now to the scarier thought. Your fuel pump may not be putting out enough volume. Your fuel pressure should raise one psi per one pound of boost. If not it will cause a lean condition which will cause knock as well. Forced induction is great when it is working but when there is a problem it sucks. I am speaking from experience.

Like I said above, try some fuel treatments and get a higher quality of fuel from a quality gas station.

With these cars it could be a million things causing knock but this is the easiest thing you can try.

2011 Regal Turbo (Wife's car)
1987 Grand National (slightly tweaked)
GNowner is offline  
post #15 of 17 (permalink) Old 03-24-2012, 08:29 PM
Junior Member
 
Join Date: Mar 2012
Location: mich
Posts: 6
...

Last edited by fbrr; 03-28-2012 at 10:51 PM.
fbrr is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Buick Regal Forum : 2011 Buick Regal Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may 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