Stuck lifter? - Page 7 - 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 04-22-2010, 04:18 PM   #61
Senior Member
True Car Nut
Thread Starter
 
xtremerevolution's Avatar
 
Join Date: Jun 2007
Location: New Lenox, IL
Posts: 2,478
Thanks: 0
Thanked 0 Times in 0 Posts
xtremerevolution is on a distinguished road
Default

Quote:
Originally Posted by Danthurs View Post
What engine is this for again, I can't keep up.
1995 L27, w-body.
xtremerevolution is offline   Reply With Quote
Old 04-22-2010, 04:30 PM   #62
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

Can't say for sure, I don't have any manuals for that year.
Danthurs is offline   Reply With Quote
Old 04-22-2010, 05:37 PM   #63
Senior Member
Posts like a Turbo
 
Tom_Sawyer_Man's Avatar
 
Join Date: Dec 2009
Location: Kitchener On.
Posts: 348
Thanks: 0
Thanked 0 Times in 0 Posts
Tom_Sawyer_Man is on a distinguished road
Default

Sorry my manuals end at 96. 96 Regal does not look even close to your description.
Tom_Sawyer_Man is offline   Reply With Quote
Old 04-22-2010, 05:56 PM   #64
Senior Member
True Car Nut
Thread Starter
 
xtremerevolution's Avatar
 
Join Date: Jun 2007
Location: New Lenox, IL
Posts: 2,478
Thanks: 0
Thanked 0 Times in 0 Posts
xtremerevolution is on a distinguished road
Default

Quote:
Originally Posted by Tom_Sawyer_Man View Post
Sorry my manuals end at 96. 96 Regal does not look even close to your description.
Yeah, the 96 got the L36, and my 95 still had the L27.
xtremerevolution is offline   Reply With Quote
Old 04-22-2010, 05:59 PM   #65
Senior Member
Posts like a Turbo
 
Tom_Sawyer_Man's Avatar
 
Join Date: Dec 2009
Location: Kitchener On.
Posts: 348
Thanks: 0
Thanked 0 Times in 0 Posts
Tom_Sawyer_Man is on a distinguished road
Default

Wish I could have beem there for ya
Tom_Sawyer_Man is offline   Reply With Quote
Old 04-22-2010, 06:00 PM   #66
Senior Member
Posts like a Turbo
 
Tom_Sawyer_Man's Avatar
 
Join Date: Dec 2009
Location: Kitchener On.
Posts: 348
Thanks: 0
Thanked 0 Times in 0 Posts
Tom_Sawyer_Man is on a distinguished road
Default

I do have FSM for your Gxp though. Do what I can for ya.
Tom_Sawyer_Man is offline   Reply With Quote
Old 04-22-2010, 06:57 PM   #67
Senior Member
True Car Nut
Thread Starter
 
xtremerevolution's Avatar
 
Join Date: Jun 2007
Location: New Lenox, IL
Posts: 2,478
Thanks: 0
Thanked 0 Times in 0 Posts
xtremerevolution is on a distinguished road
Default

No worries, I appreciate the help.
xtremerevolution is offline   Reply With Quote
Old 04-23-2010, 01:41 AM   #68
Senior Member
True Car Nut
Thread Starter
 
xtremerevolution's Avatar
 
Join Date: Jun 2007
Location: New Lenox, IL
Posts: 2,478
Thanks: 0
Thanked 0 Times in 0 Posts
xtremerevolution is on a distinguished road
Default

Anyone here use TunerPro?

I took a log of my car during different conditions for a buddy of mine to look at. WOT from 0-70, cruising at 50mph in 2nd gear, neutral rev, etc.

TunerPro counts knock up to 250 before going back to 0.

Quote:
getting a good ~12:1 AFR at WOT.

at 5222 RPM, you're hitting a 92.7% injector duty cycle. AFR was still ~12:1 though.

your long-term fuel trims before going WOT are showing you running ~16% lean before O2 correction.

knock is looking ridiculous, even rolled over the counter 4 times...

coolant temp during this process stayed very reasonable.

i don't know how prone 3800 heads are to knock(let alone the L27 heads), but DAMN! the PCM even looked like it disregarded it at times and didn't retard spark until the knock was more aggressive...
Rolling over the knock counter 4 times means my knock on a 15 minute drive was over 1000. That counter was rolling like a Las Vegas slot machine. Either this is the cause of my problem, or this broke something and whatever it broke is causing my rough idle.

I had 3/4 a tank of gas, which I topped off with 93 octane premium, and added a bottle of octane booster. I'll see how she runs tomorrow.

Any ideas?
xtremerevolution is offline   Reply With Quote
Old 04-23-2010, 08:52 AM   #69
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

What is the timing? 12.1:1 AFR is way lean. a NA engine should have 10.9:1 AFR and 14.7:1 during normal driving.
Danthurs is offline   Reply With Quote
Old 04-23-2010, 11:19 AM   #70
Senior Member
True Car Nut
Thread Starter
 
xtremerevolution's Avatar
 
Join Date: Jun 2007
Location: New Lenox, IL
Posts: 2,478
Thanks: 0
Thanked 0 Times in 0 Posts
xtremerevolution is on a distinguished road
Default

Quote:
Originally Posted by Danthurs View Post
What is the timing? 12.1:1 AFR is way lean. a NA engine should have 10.9:1 AFR and 14.7:1 during normal driving.
I'll have to check the timing on the log. I have no clue what it is right now.

Still, that'* a crazy amount of knock. Any idea what could be causing this? Aside from dynamic compression of course.
xtremerevolution is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Possible stuck lifter ajgullery 1992-1999 4 09-26-2007 01:25 PM
lifter knock L27Buick 1992-1999 5 02-18-2004 09:06 PM
lifter clatter on cold start up DAVID94SSEI 1992-1999 22 01-06-2004 10:19 PM
Amazing Way to Clear Up Lifter Noise compyelc4 1992-1999 10 06-07-2003 03:41 AM
Lifter Knock bonnieman92 1992-1999 5 06-02-2003 10:55 PM


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 03:44 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.