2002 Bonneville SSEI Severe Knock Retard - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


2000-2005 Discuss your 2000-2005 Bonneville SE, SLE, and SSEi Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Reply
 
 
 
Thread Tools Search this Thread
Old 07-24-2008, 03:12 PM   #11
Retired Senior Admin

Expert Gearhead
 
Danthurs's Avatar
 
Join Date: May 2006
Location: Sheboygan Wisconsin
Posts: 29,661
Thanks: 0
Thanked 16 Times in 13 Posts
Danthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to all
Default

If your supercharged don't use the platinum plugs. Use copper, autolite 104 should be fine.
Danthurs is offline   Reply With Quote
Old 07-28-2008, 01:45 AM   #12
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Jul 2008
Location: Burnsville Minnesota
Posts: 33
Thanks: 0
Thanked 0 Times in 0 Posts
scruggelgreen is on a distinguished road
Default

Well i ran the tests a few nights ago and found that the knock retard no longer was following the shift points as much as in the first graphs. Infact the knock retard came on sooner! So i graphed the Throttle position sensor and for the most part the knock always happens at about 75%+ throttle. Interesting enough i started getting an engine code "random/multiple misfire cylinder #1". So I decided to do a little under the hood inspection as was suggested by BillBoost37 earlier. I first started out by pulling spark plug #1 (Because of the DTC). While trying to pull off the wire off of the top of the spark plug, the wire came loose from the connector that connects to the top of the spark plug! below is an image of the rusted out wire (Connector is not visible, it is on the spark plug shown below)


OK so thats probably a big part of the problem.....
Here is the spark plug itself


Currently the gap is at 0.0615"
These are NGK irridium plugs and "Supermag A07" wires with approximately 40000 miles on them. Needless to say a plugs and wires job is in order for tomorrow night.

Last edited by scruggelgreen; 07-28-2008 at 01:57 AM.
scruggelgreen is offline   Reply With Quote
Old 07-28-2008, 02:06 AM   #13
Retired Senior Admin

Expert Gearhead
 
Danthurs's Avatar
 
Join Date: May 2006
Location: Sheboygan Wisconsin
Posts: 29,661
Thanks: 0
Thanked 16 Times in 13 Posts
Danthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to all
Default

I'm sure that'* not helping any. New wires are a good idea. Autolites are about $1.69 each, so that cheap. Gap them at .055 and go one range colder then stock. That would be the 605.
Danthurs is offline   Reply With Quote
Old 07-28-2008, 10:27 PM   #14
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Jul 2008
Location: Burnsville Minnesota
Posts: 33
Thanks: 0
Thanked 0 Times in 0 Posts
scruggelgreen is on a distinguished road
Default

Well I installed the new spark plugs and wires. I went with Autolite 104'*. I ran the tests again. I noticed a big difference in response and knock retard. Please note that this graph was taken with 89 octane fuel, I was in Iowa this last weekend and it is really hard to find 91+ fuel down there. Can you let me know if this looks more like it should or if the knock still seems high, Thanks!

Black = Vehicle Speed
Blue = Knock Retard
Green = Ignition Timing Advance
Orange = Engine Speed
scruggelgreen is offline   Reply With Quote
Old 07-28-2008, 10:48 PM   #15
Retired Senior Admin

Expert Gearhead
 
Danthurs's Avatar
 
Join Date: May 2006
Location: Sheboygan Wisconsin
Posts: 29,661
Thanks: 0
Thanked 16 Times in 13 Posts
Danthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to all
Default

OK, it is better, and better gas will help a bit. But I see your timing at about 10 or 11 deg. Unless I'm wrong you should be 14* at the lowest. Did you say you had 3* taken off the PCM? I can't remember. If you go back to stock timing that will remove 3 or 4* from the KR and that takes care of most of what'* left leaving perhaps 3*, better gas should drop another deg. and that will get you were you want to be. Also, what did you gap the plugs at?
Danthurs is offline   Reply With Quote
Old 07-28-2008, 11:19 PM   #16
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Jul 2008
Location: Burnsville Minnesota
Posts: 33
Thanks: 0
Thanked 0 Times in 0 Posts
scruggelgreen is on a distinguished road
Default

My PCM is 100% stock, i havent changed anything with that. The plugs right out of the box were at ~.054 so i didnt bother with changing the gap on them.
scruggelgreen is offline   Reply With Quote
Old 07-28-2008, 11:42 PM   #17
Retired Senior Admin

Expert Gearhead
 
Danthurs's Avatar
 
Join Date: May 2006
Location: Sheboygan Wisconsin
Posts: 29,661
Thanks: 0
Thanked 16 Times in 13 Posts
Danthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to all
Default

Hmmm, your timing seems really low. Mine floats around 15* and only getting to 14* breifly.
Danthurs is offline   Reply With Quote
Old 07-28-2008, 11:55 PM   #18
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Jul 2008
Location: Burnsville Minnesota
Posts: 33
Thanks: 0
Thanked 0 Times in 0 Posts
scruggelgreen is on a distinguished road
Default

Do you think it might have something to do with the fact that i have only put 1 driving cycle on the new plugs? Maybe the computer is still "Learning" the new plugs?
scruggelgreen is offline   Reply With Quote
Old 07-29-2008, 10:39 AM   #19
Senior Member
Certified Car Nut
 
Join Date: Oct 2003
Posts: 19,756
Thanks: 0
Thanked 0 Times in 0 Posts
1993 SLE is on a distinguished road
Default

Quote:
Originally Posted by Danthurs View Post
Hmmm, your timing seems really low. Mine floats around 15* and only getting to 14* breifly.

because the car has learned the KR it tries to back off the timing to prevent the KR, that is why the timing is low
1993 SLE is offline   Reply With Quote
Old 07-29-2008, 02:14 PM   #20
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Jul 2008
Location: Burnsville Minnesota
Posts: 33
Thanks: 0
Thanked 0 Times in 0 Posts
scruggelgreen is on a distinguished road
Default

I figure i will run the car for a week or so and get 10+ trips on it and some 92 octane fuel in it to see where i am at then test it again
scruggelgreen is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
how can you reduce knock retard on the 01 ssei SPEED ADICTIONS Performance, Brainstorming & Tuning 7 05-01-2008 05:31 PM
knock retard on 01 ssei SPEED ADICTIONS Performance, Brainstorming & Tuning 3 04-27-2008 08:04 PM
knock knock knock L27Buick 1992-1999 7 09-17-2004 04:23 PM
Knock Knock, engine knock? Spiral 1992-1999 5 05-23-2004 10:08 PM
KNOCK RETARD Forced Induction 22 04-29-2003 01:36 AM


Tags
detonation, ignition timing advance, knock retard

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 05:17 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.