Crazy idle upon start-up '93 - 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 06-14-2004, 02:40 PM   #1
Junior Member
Thread Starter
 
Join Date: Jun 2004
Location: Shakopee, MN
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts
GroceryGetter is on a distinguished road
Default Crazy idle upon start-up '93

Hello All,

I have been reading about what might be the problem on this site but I cannot figure it out at all. My car is an all original 93 Bonneville that has a wicked idle upon start-up. It will do it for about 1-3 minutes and then it will go away. My mom gave me the car so I know that it has been babied, I made her for the most part. It has 150,000 miles on it and runs great except for this problem. I have talked with a few mechanic friends and they are telling me that these cars are notorious for having the fuel pressure regulator go out on them, but that seems a little strange to me. I have also read that it might be something to do with the throttle body. I was going to take it off and look at it but that particular area looks to be a big mess and without step by step directions I am not going to tear into it. Does anyone know what might be the problem with it? I know that it isnt the fuel pump because when you give it gas the car will actually rev and also once you leave it for a short time it does not happen again until the car has been sitting for a while. Any help on this would be greatly appreciated. Thanks.
GroceryGetter is offline   Reply With Quote
Old 06-14-2004, 02:44 PM   #2
Senior Member
True Car Nut
 
Join Date: Sep 2002
Posts: 3,392
Thanks: 0
Thanked 0 Times in 0 Posts
fuddyduddy121 is on a distinguished road
Default

How high is the idle upon startup?
fuddyduddy121 is offline   Reply With Quote
Old 06-14-2004, 03:15 PM   #3
Junior Member
Thread Starter
 
Join Date: Jun 2004
Location: Shakopee, MN
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts
GroceryGetter is on a distinguished road
Default

It will bounce from 1200 down to almost stall, which it actually did this morning, and then back up again.
GroceryGetter is offline   Reply With Quote
Old 06-14-2004, 03:27 PM   #4
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

Use the procedure in Techinfo to extract any codes. All you need is a paperclip.
willwren is offline   Reply With Quote
Old 06-14-2004, 03:33 PM   #5
Junior Member
Thread Starter
 
Join Date: Jun 2004
Location: Shakopee, MN
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts
GroceryGetter is on a distinguished road
Default

Does the ECM pull codes without flashing the SES? I have not had a code on this problem at all.

I am not familar with these cars at all, I delt with nothing but my Camaro and now it is time to branch out. These cars run an OBD1 correct? If so jumping the terminals will just pull stored codes and like I said the SES has not been tripped at all.
GroceryGetter is offline   Reply With Quote
Old 06-14-2004, 03:34 PM   #6
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

Not all stored codes will set the SES.
willwren is offline   Reply With Quote
Old 06-14-2004, 03:39 PM   #7
Junior Member
Thread Starter
 
Join Date: Jun 2004
Location: Shakopee, MN
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts
GroceryGetter is on a distinguished road
Default

I will pull those out tonight when I am by the car and put it here.

Edit: It is a good thing I looked out there for the code retrieval, it is the same as my Camaro and the codes are very simliar as the Camaro. If there is actually a code it will at least be easy to diagnose it. Thanks.
GroceryGetter is offline   Reply With Quote
Old 06-14-2004, 03:48 PM   #8
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

93 is the last year that feature worked on the Bonnevilles. This is very basic. Further troubleshooting will require a scantool to do it right. Check Techinfo for a scantool registry. We may very well have someone near you with one.
willwren is offline   Reply With Quote
Old 06-14-2004, 11:32 PM   #9
Senior Member
True Car Nut
 
Join Date: Sep 2002
Posts: 3,392
Thanks: 0
Thanked 0 Times in 0 Posts
fuddyduddy121 is on a distinguished road
Default

I know most GM cars will idle high upon startup, like even up to 1500 sometimes. You need to see what your computer is requesting the idle to be set at.
fuddyduddy121 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Idling at 2k upon start up!? why so high? esec. in cold?? orty Lounge 8 01-29-2006 12:58 PM
Surging upon startup??? need help Jrios 2000-2005 6 01-24-2004 11:08 AM
Holidays Upon Us Sol Lounge 11 11-19-2003 01:15 AM
sputters upon warm start-up Roni271 1992-1999 10 05-13-2003 08:19 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 02:58 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.