Randomly stalling… fuel related? - 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 07-28-2009, 09:45 PM   #1
Senior Member
Certified GM nut
Thread Starter
 
SignOfZeta's Avatar
 
Join Date: Mar 2005
Location: New Milford, CT
Posts: 2,284
Thanked 16 Times in 13 Posts
SignOfZeta has a spectacular aura aboutSignOfZeta has a spectacular aura about
Default Randomly stalling… fuel related?

I've got a 1997 SE that stalls out every so often. So far, it'* done it at idle in neutral, 70 on the highway with the cruise on, when making a right turn, and at other unrelated times. Empty, half-full, or full tank. No check engine codes.

Tonight, I was idling at the McDonald'* drive through (central Connecticut, behind a burgundy SSE…*anyone we know?), when the engine started surging. The voltage was dropping from 14 to about 11 or 12. I gave it a little gas, the voltmeter perked up, the tach settled at idle (~800 RPM) and all was fine.

Still waiting in line about 20 seconds later, and I hear the ding-ding-ding sound that indicates "hey, your engine shut off." I turned the key, and the engine turned over but didn't start. It took about ten seconds of intermittent cranking and waiting to get it to crank back up, and it roughly came back to life.

Runs beautifully and smoothly otherwise (of course).

Now, I saw this old thread ("Stalling woes", https://www.gmforum.com/t224668/) and thought that this might be related. The car is almost thirteen years old and is on its first fuel pump. Should I assume that this is fuel related?
SignOfZeta is offline   Reply With Quote
Old 07-28-2009, 09:48 PM   #2
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

Try using a different key. It could be a problem with your VATs.
Danthurs is offline   Reply With Quote
Old 07-29-2009, 12:11 AM   #3
Senior Member
Certified GM nut
Thread Starter
 
SignOfZeta's Avatar
 
Join Date: Mar 2005
Location: New Milford, CT
Posts: 2,284
Thanked 16 Times in 13 Posts
SignOfZeta has a spectacular aura aboutSignOfZeta has a spectacular aura about
Default

The security light never flashes. Still, I'll switch over to my spare key and report back.
SignOfZeta is offline   Reply With Quote
Old 07-29-2009, 12:15 AM   #4
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

Also try checking the battery cables, make sure they are clean. This sounds like a loose connection.
Danthurs is offline   Reply With Quote
Old 07-29-2009, 12:18 AM   #5
Senior Member
Certified GM nut
Thread Starter
 
SignOfZeta's Avatar
 
Join Date: Mar 2005
Location: New Milford, CT
Posts: 2,284
Thanked 16 Times in 13 Posts
SignOfZeta has a spectacular aura aboutSignOfZeta has a spectacular aura about
Default

Could be. I remember seeing "clean the battery cables" pop up a lot in search results, for just about every problem. That'll give me something to do this weekend. Will report back if I don't electrocute myself.
SignOfZeta is offline   Reply With Quote
Old 07-29-2009, 08:53 AM   #6
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

Thought I read before in the FSM that when security is triggered it allows the fuel pump to prime and then disables the circuit. This means the car will start and then promptly die out. Once the system starts though it will not shut down because disabling the car after running and driving would provide a hazard and therefore the engineers didn't build anything in to disable it once it was running.

The battery cables are a frequent culprit of this issue as well as a host of other items.

Colin.. if you believe it'* fuel pressure, we can chack that when you stop by to look at the cooling issues.
BillBoost37 is offline   Reply With Quote
Old 07-29-2009, 11:52 PM   #7
Senior Member
Certified GM nut
Thread Starter
 
SignOfZeta's Avatar
 
Join Date: Mar 2005
Location: New Milford, CT
Posts: 2,284
Thanked 16 Times in 13 Posts
SignOfZeta has a spectacular aura aboutSignOfZeta has a spectacular aura about
Default

Bill and I tested everything. Fuel pressure is fine, though on the low end of normal. Battery cables are clean, though one looks like it was custom-made. Throttle works fine, too. Spark plugs are 20,000 miles old, as are the wires.

Hopefully, the new crank sensor fixes it.
SignOfZeta is offline   Reply With Quote
Old 07-30-2009, 08:19 AM   #8
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

What we did was clean the motor down. Serves three purposes, cleaner motor (makes me happier),tests that the plug wires are good and not arching and tests for vacuum leaks. Engine ran great while being doused with a hose.

Checked fuel pressure and while Colin believes it'* the low side...it'* right on normal. The FSM states to click the key on and off auot 10 times to achieve the highest pressure possible with the motor not running. I clicked twice and the system held a good 50-52 psi. FSM says 48-52 is the normal value. Having seen pumps get weak once in use, we started and ran the car. Overall it idled about 42ish and would drop ever so slightly and recover if I revved the motor. In my book, it appeared to be a good pump.

Then the crank sensor code was mentioned again, as well as what Colin'* mechanic charges to do the job. I happened to have a sensor laying around, the jack and air gun popped out and about 15 minutes later the new sensor was doing the engine good. Hopefully that clears up the stalling issue.

Was good to meet you and get a chance to see the car.
BillBoost37 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
'98 3.8l hard to start, fuel pressure related, looking for help hotrod53 1992-1999 2 10-24-2008 06:19 PM
Interesting Finding with DIC and Fuel-Winter gas related? Grimm General GM Chat 3 05-14-2007 10:25 AM
1994 Olds LSS stalling randomly, P1406 code - !!Fixed!! EGR KneeHowMa 1992-1999 13 12-18-2006 06:31 PM
Quick question (fuel pump related) North Correia General GM Chat 11 12-10-2006 04:22 PM
Car Randomly doesnt start 94bonnyV 1992-1999 17 03-03-2003 04:30 AM


Tags
fuel, pump, stalling, voltage

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 03:15 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.