'95 Bonneville that stalls - like shutting off key - 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.

Closed Thread
 
 
 
Thread Tools Search this Thread
Old 09-20-2007, 05:09 PM   #1
Junior Member
Thread Starter
 
Join Date: Sep 2007
Location: Henderson, NV
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
George Van Wingerden is on a distinguished road
Default '95 Bonneville that stalls - like shutting off key

I have a base model '95 Bonneville SE that stalls at odd intervals... 30 seconds one time 30 minutes the next. Most of the time the engine will start right back up, while a few times it will crank for a long time before starting.

When the engine stalls, it dies as if the key had been turned off... like an electrical disconnect and not as if it is running out of fuel.

Vehicle does not have remote key entry, nor does it have pass-key theft deterent system from the factory, and the aftermarket remote entry/alarm system has been disconnected. It does have power locks and power windows.

I've checked for codes and there are none.

Checked and cleaned the buss grounds by the left side and right side doors. No effect.

Cleaned the engine compartment body grounds. No effect.

Checked battery terminals for corrosion. None.

Replaced the crank sensor. No effect.

Replaced the Ignition Control Module. No effect.

I disconnected the Pass-key Decoder module connector and it had no effect at all... engine started and ran as usual (until it quits on its own after 30 seconds to 30 minutes).

Engine appears to lose spark and the injectors do not appear to continue to fire during engine winddown after stall (no black smoke on restart out tailpipe).

Fuel pressure stays at 42-45 psi even after stall.

Sometimes the fuel pump relay, cooling fan relay and cluster lights "cycle" on and off at approx a 10 Hz rate when the engine stalls.

Any help or insight on this issue would be greatly appreciated.[/b]
George Van Wingerden is offline  
Old 09-20-2007, 11:08 PM   #2
BANNED
 
Join Date: Aug 2002
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
banned3800 is on a distinguished road
Default

Replace the PCM, Its bad...

This is a very common issue with the 94-95 3800 C and H bodies.... with the description you have provided I think the PCM will be your best bet

__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
banned3800 is offline  
Old 09-21-2007, 12:08 AM   #3
Junior Member
Thread Starter
 
Join Date: Sep 2007
Location: Henderson, NV
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
George Van Wingerden is on a distinguished road
Default

Thanks jr,
I'll post the outcome of replacing the PCM. I was 80% convinced it was the PCM because of the "common denominators" all leading to the PCM. It'* good to have a little feedback that helps make that call.
George Van Wingerden is offline  
Old 09-21-2007, 12:56 AM   #4
BANNED
 
Join Date: Aug 2002
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
banned3800 is on a distinguished road
Default

Please do let us know the outcome...

__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
banned3800 is offline  
Old 09-21-2007, 07:48 AM   #5
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

I'm 100% in agreement here.

For some reason the 94/95 PCM'* were the most unreliable PCM years. My local parts store actually stocks one on the shelf.
BillBoost37 is offline  
Old 09-21-2007, 12:03 PM   #6
Senior Member
Certified GM nut
 
Join Date: Jan 2007
Location: allentown, pa--brooklyn, ny
Posts: 1,646
Thanks: 0
Thanked 0 Times in 0 Posts
88bonnsse is on a distinguished road
Default

my 95 se did the same and thanks to a new pcm its been running execellent ever since..

i paid $27 for one at my yard.......
88bonnsse is offline  
Old 09-21-2007, 03:56 PM   #7
Senior Member
Certified GM nut
 
Join Date: Feb 2004
Location: CT
Posts: 2,099
Thanks: 0
Thanked 1 Time in 1 Post
SSEBONNE4EVA is on a distinguished road
Default pcm

I paid $20 for mine at the yard and recently used it on my 90. Threw multiple codes that didn't make sense, then started dumping fuel with massive smoke. PCM ECU fixed it.
Just be sure you ground out any residual charge after unhooking the Battery to change it. You could do this by turning a few accessories on and of with the battery unhooked or step on the brake.
SSEBONNE4EVA is offline  
Old 09-21-2007, 05:48 PM   #8
Junior Member
Thread Starter
 
Join Date: Sep 2007
Location: Henderson, NV
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
George Van Wingerden is on a distinguished road
Default

PCM took care of the problem. Ran engine for an hour and a half after installing the reman'd PCM and it never quit.
Thanks for all your help guys. Hopefully this will help someone else also
George Van Wingerden is offline  
Old 09-21-2007, 06:53 PM   #9
Junior Member
Thread Starter
 
Join Date: Sep 2007
Location: Henderson, NV
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
George Van Wingerden is on a distinguished road
Default

BTW, I have a full set of 95 Bonneville schematics in .pdf format if needed.
George Van Wingerden is offline  
Old 09-21-2007, 07:36 PM   #10
BANNED
 
Join Date: Aug 2002
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
banned3800 is on a distinguished road
Default

Glad to hear that solved the problem...

__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
banned3800 is offline  
 
 
Closed Thread

Related Topics
Thread Thread Starter Forum Replies Last Post
2001 Bonneville - P0172 - Car shutting off while driving lululovesu 2000-2005 8 05-08-2011 08:44 PM
Anyone else have trouble with gas pumps not shutting off? J Wikoff General GM Chat 20 06-23-2007 02:24 AM
Car randomly shutting off?... (fixed) rizergt 1992-1999 14 02-01-2007 12:26 PM
Car has trouble starting after shutting off for a few minute Mazee 1992-1999 1 05-16-2005 09:17 PM
Air compressor stays on for long time after shutting car off 1995BvSSE 1992-1999 1 12-28-2002 02:28 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 02:05 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.