New scanner, - 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 10-14-2007, 07:50 PM   #1
Senior Member
Posts like a Northstar
Thread Starter
 
Join Date: Aug 2007
Location: Ladysmith B.C. Canada
Posts: 620
Thanks: 0
Thanked 0 Times in 0 Posts
JMH1950 is on a distinguished road
Default New scanner,

I took 'Christine' out for a long ride today, with the wife driving so it would get a good workout. Had the scanner hooked up the whole time and could use some help with the results.

Outside air temp - - 55F
road dry.

O2S (mv) - - - 60 - 805
crosscounts - - 6 -12

MAF (gr/sec) ---up to 30
IAT --- hwy 57F city 65F

Trans Temp ----- maxed out at 210 going up an 8% grade for 3 miles
KS counter ----- Maxed out at 170
Coolant temp --- 190F

My intermittent trans problem showed up after the run up the hill. No overdrive and the following scan results:

With cruise control on at 70 mph and 3000 rpm shifter in OD

TCC applied -------------- NO
TCC Duty Cyc (%) --------0
TCC Slip RPM -------------200 cruise -255 coasting
TCC selenoid -------------OFF
Throttle (%) -------------19


I then went to the second set of paremeters on the scan tool and found that I had a code 740 TCC clutch failure.

I cleared the code and within a few seconds I had OD again. However by this time the trans temp had dropped to 185F so I don't know if clearing the code or the drop in temp is what helped out with the OD.

After OD started working the scanner had the following

Speed 70 mph RPM 1900 (from tach)

TCC applied ---------- YES
TCC Duty Cyc (%) -------32
TCC Slip RPM ----------13
TCC Selenoid ----------ON


So is this telling me that I need a trans cooler?
Is it the PCM telling the trans not to go into overdrive or is there a problem within the transmission?
JMH1950 is offline   Reply With Quote
Old 10-14-2007, 07:58 PM   #2
Senior Member
Certified Car Nut
 
Join Date: Mar 2003
Posts: 12,432
Thanks: 0
Thanked 0 Times in 0 Posts
J Wikoff is on a distinguished road
Default

1. That'* a lot of knock counts. Look into that.

2. Did you watch the RPM slip during light acceleration with the TCC locked? If it stays down around 12-15, your TCC at least isn't slipping. Not below a certain temp anyway. I think 210 is fine for short term tranny temps, but I could be wrong.
J Wikoff is offline   Reply With Quote
Old 10-14-2007, 08:54 PM   #3
Senior Member
Posts like a Northstar
Thread Starter
 
Join Date: Aug 2007
Location: Ladysmith B.C. Canada
Posts: 620
Thanks: 0
Thanked 0 Times in 0 Posts
JMH1950 is on a distinguished road
Default

Quote:
Originally Posted by J Wikoff
1. That'* a lot of knock counts. Look into that.

2. Did you watch the RPM slip during light acceleration with the TCC locked? If it stays down around 12-15, your TCC at least isn't slipping. Not below a certain temp anyway. I think 210 is fine for short term tranny temps, but I could be wrong.

With the TCC locked it was only slipping by 13 rpm. It was when OD wasn't working and the TCC was OFF that it was slipping and yes I could watch it slipping via the scanner. The harder the acceleration the more the slip. When coasting the slip went into the minus category.


The knock counts had me concerned also. 0 knock retard though. Maybe the NA models don't have that feature?
I was getting up to 35 degrees advance on a hard acceleration and about 15 -20 cruising.
JMH1950 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Actron Code Scanner pgault Everything Electrical & Electronic 2 03-15-2004 01:15 AM
ATTN: I officially have a code scanner 94SSEgold Lounge 0 03-04-2004 09:50 PM
Stupid Question....what scanner to buy? gruveb 1992-1999 7 01-19-2004 04:24 PM
Scanner for 94 SSEi rhamby 1992-1999 0 06-27-2003 03:23 PM
How Do I Create My Scanner Light Turn Signal????? DJGOODYB31682 1992-1999 4 10-22-2002 12:47 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 12:54 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.