A slow, painful death? - 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 01-09-2008, 07:49 PM   #1
Junior Member
Thread Starter
 
Join Date: Mar 2003
Location: Purgatory
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
vital49 is on a distinguished road
Default A slow, painful death?

Lately, I've noticed in the GS a funny behavior that I attribute to the transmission.

Once the torque converter has locked up, but at a low speed (I think it locks in around 48 MPH), if you ease into the gas, but not enough for it to downshift, it chugs and bucks. Obviously, the more you push the gas, but not enough for that downshift, the more it does it.

I highly doubt it'* an ignition issue since I just 100% went through the engine. New plugs, wires, fuel filter, yada, yada, yada.

So, is there any hope for this thing? Or, should I just plan on a rebuild in the near future? We're hoping to take this car to Florida in March.

Oh, BTW, it has 105,000 miles.
vital49 is offline   Reply With Quote
Old 01-09-2008, 08:27 PM   #2
Mark Fahey
Guest
 
Posts: n/a
Default

There are a number of threads on this subject as quite a few of us are experiencing the same symptoms. While there have been many suggestions on things to try, there doesn't seem to be any one item that fixes the problem.
You almost certainly don't need a rebuild. Here are a couple of threads.
http://www.bonnevilleclub.com/forum/...light=chugging
http://www.bonnevilleclub.com/forum/...light=chugging
  Reply With Quote
Old 01-09-2008, 09:19 PM   #3
Junior Member
Thread Starter
 
Join Date: Mar 2003
Location: Purgatory
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
vital49 is on a distinguished road
Default

So, did you ever really figure it out?

All my engine work was done 3,000 miles ago. AC Delco wires and Autolite plugs.
vital49 is offline   Reply With Quote
Old 01-09-2008, 09:40 PM   #4
Senior Member
Posts like a Supercharger
 
Join Date: May 2007
Location: Ottawa Ontario, Canada
Posts: 173
Thanks: 0
Thanked 0 Times in 0 Posts
GMC Guy is on a distinguished road
Default

i was talking to a trans shop the other day about ideas for my bonne... he was mentioning the modulator valve goes in them.... causes hard shift etc... could this ber it?
sorry if i am way off base
GMC Guy is offline   Reply With Quote
Old 01-09-2008, 09:55 PM   #5
Senior Member
Posts like a Northstar
 
Join Date: Sep 2006
Location: Dumfries, Virginia Member: #6887
Posts: 577
Thanks: 0
Thanked 0 Times in 0 Posts
whitecrystal1 is on a distinguished road
Default

Vital, Does it feel like the tranny is trying to shift when it does it? Is it right at the point when the RPM are trying to drop and after it does it'* not an issue until you slow down and then speed back up. Also, if you drive more aggressive then light footing it, it doesn't do it?

I am seeing this with my 95. I haven't figured it out yet but I am also running a little rich. High HC levels, see my post here for that issue http://www.bonnevilleclub.com/forum/...475&highlight=
In my case I think the two are related
I did everything I can think of to try to correct this except running some Seafoam in it, which I am going to do tomorrow.

For your info things I've tried so far are:
  • - New plugs and wires (Delco) --see the picture of the plugs I took out. they are a little dark. Take one of yours out and see it you are seeing the same thing in yours.
    - I tested and swapped out the coils and ICM just to see if it would help, it didn't
    - New 02 senser (Delco)

Edit to add - I also cleaned the throttle body, MAF and IAC
whitecrystal1 is offline   Reply With Quote
Old 01-09-2008, 10:08 PM   #6
Senior Member
True Car Nut
 
Join Date: Jul 2004
Location: Twin Falls, Idaho
Posts: 7,545
Thanks: 0
Thanked 1 Time in 1 Post
Hans is on a distinguished road
Default

coils, icm, tps, maf, all could potentially cause this problem.

your torque converter clutch could also have seen better days before.
Hans is offline   Reply With Quote
Old 01-10-2008, 09:40 AM   #7
Junior Member
Thread Starter
 
Join Date: Mar 2003
Location: Purgatory
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
vital49 is on a distinguished road
Default

Quote:
Originally Posted by whitecrystal1
Vital, Does it feel like the tranny is trying to shift when it does it? Is it right at the point when the RPM are trying to drop and after it does it'* not an issue until you slow down and then speed back up. Also, if you drive more aggressive then light footing it, it doesn't do it?
It doesn't feel like the tranny is trying to shift unless I give it more throttle. More demand will equal the down shift. It'* not right when the RPM are trying to drop, but AFTER the RPMs have dropped and the torque converter is fully engaged. If I drive it more aggresively it doesn't do it all. I just happened to notice it one day and turned to my wife and asked her about it. She said it happens all the time. This coming from the girl who drives any car EXTREMELY nicely. Her record boost pressure is .8 lbs. and that was on the e-way when she went to pass someone.
vital49 is offline   Reply With Quote
Old 01-15-2008, 09:37 PM   #8
Member
Posts like a V-Tak
 
Join Date: Jun 2007
Posts: 33
Thanks: 0
Thanked 0 Times in 0 Posts
350TPI is on a distinguished road
Default

My 03 SSEi with 52,000 miles just started doing this crap.
350TPI is offline   Reply With Quote
Old 01-18-2008, 01:47 AM   #9
Member
Posts like a V-Tak
 
bnuge942's Avatar
 
Join Date: Sep 2006
Posts: 67
Thanks: 0
Thanked 0 Times in 0 Posts
bnuge942 is on a distinguished road
Default

I have the same problem on my 00 SSEi, the tranny shop said the PCS could be replaced but its gonna cost about $1200. Its been doing it since about 150,000 and now I have 216,000 miles.
bnuge942 is offline   Reply With Quote
Old 01-18-2008, 08:51 AM   #10
Junior Member
Thread Starter
 
Join Date: Mar 2003
Location: Purgatory
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
vital49 is on a distinguished road
Default

Little update on this....

I turned to regalgs.org for assistance on this one. Have quite a thread going over there. Apparently this is more of an issue in the Regals for whatever reason. The common culprit is a lazy throttle position sensor. I bought a new GP Sorensen unit and installed it a few days ago. I haven't had a chance to test drive it since the swap (it'* my wife'* DD and I've been swamped with life things), but she claims it'* better. Better in her terms could mean a million different things. But, I plan to really test it out this weekend.

If that doesn't do it, I'm leaning toward a true transmission issue. So, I'll drop the pan and drain out as much fluid as possible. I'll replace the filter and the necessary fluid to get it topped off again. We'll see where that leads me....
vital49 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
GM's Slow Death GXP Venom Lounge 10 11-20-2008 10:54 PM
My Easter Sunday wheels.... sharp, but slow....five-slow. OLBlueEyesBonne Lounge 6 04-09-2007 12:25 AM
Ouch... painful. Bonneville92V688 Lounge 6 07-10-2006 10:15 PM
Blower Motor is dying a slow, painful death.... gruveb 1992-1999 8 01-23-2004 04:10 AM
Death of a Bonne ASDadam General GM Chat 4 12-31-1969 08:00 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 05:53 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.