The SSExi project v3.5 - Page 4 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Reply
 
 
 
Thread Tools Search this Thread
Old 05-20-2011, 03:22 PM   #31
Retired Senior Admin

Expert Gearhead
Thread Starter
 
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 did walk away, I just came back. I've got months in this now. Now it'* personal. Where the hell is my hammer?
Danthurs is offline   Reply With Quote
Old 05-20-2011, 03:44 PM   #32
Retired Senior Admin

Expert Gearhead
Thread Starter
 
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

AAAHHHHHHH!!!!!!!! Unbolted the torque converter from the flex plate. Problem is gone. For crying out loud.
Danthurs is offline   Reply With Quote
Old 05-20-2011, 03:46 PM   #33
Senior Member

True Car Nut
 
2kg4u's Avatar
 
Join Date: Sep 2006
Location: Windsor, Ontario / Detroit, Michigan
Posts: 4,804
Thanked 220 Times in 181 Posts
2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of
Default

Just throwing it out there for discussion; why not disconnect the knock sensors and replace them with 3.5 kohm sims?. If the issue is false knock, your KR problems will go away. If it is truly pre-detonation and you cook a cylinder, how is fixing that any harder than pulling the engine out 3 or 4 more times to fix the KR issue?

I remember putting timing weights in the distributor of my 78 TA, only to find it sounded like a popcorn machine with all the predetonation at WOT. I pulled the timing weights out. No damage to the engine.

I am not a supporter of running without knock sensors, so like I said, I'm just putting it out there for discussion.
2kg4u is offline   Reply With Quote
Old 05-20-2011, 03:48 PM   #34
Retired Senior Admin

Expert Gearhead
Thread Starter
 
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

It'* a good idea, however, I have used 3 different sets of knock sensors.
Danthurs is offline   Reply With Quote
Old 05-20-2011, 03:53 PM   #35
Senior Member

True Car Nut
 
2kg4u's Avatar
 
Join Date: Sep 2006
Location: Windsor, Ontario / Detroit, Michigan
Posts: 4,804
Thanked 220 Times in 181 Posts
2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of
Default

Quote:
Originally Posted by Danthurs View Post
It'* a good idea, however, I have used 3 different sets of knock sensors.

Sounds like you fixed it, but I was not suggesting a different knock sensor. I was suggesting running without the knock sensors. By plugging in 3.5 kohm grounded resistors to the knock sensor connectors you are fooling the ECM into thinking a knock sensor is in place. I'm not sure on our engines, but I think simply unplugging the knock sensors causes the timing to retard by 10*. Using the resistors avoids that.
2kg4u is offline   Reply With Quote
Old 05-20-2011, 04:43 PM   #36
Retired Senior Admin

Expert Gearhead
Thread Starter
 
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've already determined the KR is not from predetonation. I've adjusted the tune in the problem area far to many times. Remove timing only to have the same amount of KR there, remove more timing, same KR, remove more timing, same KR. Over and over again. The KR is false in a sense it'* not detonation. It'* noise. Something is vibrating. I've gone threw 2 short blocks, on the 3rd now. Each short block was a new crank, pistons, and balance shaft. No change. Second engine had new timing cover, timing gears, push rods, heads, valves, and oil pump. No change. 3rd engine had a new flex plate, and lifters. no change. I then swapped out harmonic balancers, no change. Now I swapped out the cam, no change. Each engine had fresh sensors as well, no change. The only parts transfered over will not cause false KR. Headers are not touching anything, LIM, IC core, supercharger and throttle body will not cause this. But to test I removed the supercharger belt, no change.

So, after all this, what is left. The PCM and wiring harness. Not likely to cause this problem. And the transmission. Transmission is unlikely to cause this problem. however, the torque converter is bolted to the flex plate. So, in theory, a out of balance torque converter will translate that vibration directly in to the flex plate, and then in to the crank, which can explain the lose of bearings. Only way to test it is to pull the engine to get to the TC and swap it out.
Danthurs is offline   Reply With Quote
Old 05-20-2011, 04:52 PM   #37
Retired Administrator

True Car Nut
 
GunsOfNavarone's Avatar
 
Join Date: Apr 2009
Location: Williamsport, PA
Posts: 2,856
Thanked 167 Times in 129 Posts
GunsOfNavarone has much to be proud ofGunsOfNavarone has much to be proud ofGunsOfNavarone has much to be proud ofGunsOfNavarone has much to be proud ofGunsOfNavarone has much to be proud ofGunsOfNavarone has much to be proud ofGunsOfNavarone has much to be proud ofGunsOfNavarone has much to be proud ofGunsOfNavarone has much to be proud ofGunsOfNavarone has much to be proud of
Default

I feel for you Dan.... what a challenging diagnostic.
GunsOfNavarone is offline   Reply With Quote
Old 05-20-2011, 05:33 PM   #38
Retired Senior Admin

Expert Gearhead
Thread Starter
 
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 going to figure this out. This is personal now.
Danthurs is offline   Reply With Quote
Old 05-20-2011, 09:20 PM   #39
Senior Member
True Car Nut
 
Buick96's Avatar
 
Join Date: Jan 2011
Location: Michigan
Posts: 3,344
Thanks: 0
Thanked 0 Times in 0 Posts
Buick96 is on a distinguished road
Default

After reading this thread I feel I now know how to take my engine completely apart and put it back together.
Buick96 is offline   Reply With Quote
Old 05-20-2011, 09:22 PM   #40
Retired Senior Admin

Expert Gearhead
Thread Starter
 
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 guess that'* kind of the point.
Danthurs is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
SSExi lives Danthurs Your Ride: GM Pictures & Videos 26 07-11-2011 12:01 PM
The SSExi project v3.0 Danthurs 1992-1999 99 05-13-2011 10:49 PM
Another year of SSExi Danthurs Your Ride: GM Pictures & Videos 14 08-29-2010 01:26 AM
First photo shoot of 2010 for SSExi Danthurs Your Ride: GM Pictures & Videos 17 04-12-2010 03:19 PM
A year of SSExi Danthurs Your Ride: GM Pictures & Videos 15 12-07-2009 11:25 AM


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 08:22 AM.


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.