Stalling - 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 02-03-2009, 01:11 PM   #1
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Dec 2004
Location: Alabama
Posts: 51
Thanks: 0
Thanked 1 Time in 1 Post
silver_SE is on a distinguished road
Default Stalling

I have a 2002 bonnie that stalls for no apparent reason. I can drive it for about 10-12 miles and then the engine wants to go dead. It'* almost like somebody is turning a key off. I am able to restart it, and keep it running, but only if i keep the rpms at 3k to 4k. Then, after the car sits for about 30min, it will start and run fine for another 20miles.

I'm suspect of the Crankshaft Position Sensor. Any thoughts on this?

I have recently (for this and other issues) replaced the following:
new fuel filter
new fuel pressure regulator
new MAF
new Engine Coolant Temperature sensor

thanks for your ideas. i'll keep you posted.
silver_SE is offline   Reply With Quote
Old 02-03-2009, 01:35 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

This here is a very general test for the Crankshaft position sensor I did. Guess I better do a better one when it warms up a bit.

Quote:
With the engine cranking, check the voltage from the orange wire to ground on the crankshaft timing sensor and the camshaft reference sensor.

  • Over 7V is satisfactory.


With the ignition switch on, check the voltage drop across the ground circuit (black/light blue wire) on the crankshaft timing sensor and the camshaft reference sensor.

  • A reading below 0.2V is satisfactory.
When using a digital voltmeter to check a crankshaft or camshaft sensor signal, crank the engine a very small amount at a time and observe the voltmeter. The voltmeter reading should cycle from almost 0 volts to a highter voltage of about 5 volts. Since digital voltmeters do not react instantly, it is difficult to see the change in voltmeter reading if the engine is cranked continually.

  • If the voltage does not cycle, sensor replacement is required.

  • Each sensor voltage signal should cycle from low voltage to high voltage as the engine is cranked.
Have you checked your battery cables? Sometimes they get corroded and can kill the engine at random.
Danthurs is offline   Reply With Quote
Old 02-11-2009, 10:32 AM   #3
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Dec 2004
Location: Alabama
Posts: 51
Thanks: 0
Thanked 1 Time in 1 Post
silver_SE is on a distinguished road
Default

Ok, i have an update. The problem is still not resolved. Any suggestions would be appreciated.

2002 Bonneville SE with 181k miles. I have replaced (in order):
new spark plug wires
rebuilt MAF sensor (had gotten a code on this)
new fuel filter
new Engine Coolant Temp sensor (had gotten a code on this)
new Fuel Pressure Regulator (pressure check in spec at key on and idle)
new Crank Position Sensor (AC Delco part)

I don't have any engine codes on the check engine light.

Any suggestions?
silver_SE is offline   Reply With Quote
Old 02-11-2009, 10:36 AM   #4
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Dec 2004
Location: Alabama
Posts: 51
Thanks: 0
Thanked 1 Time in 1 Post
silver_SE is on a distinguished road
Default

Oh, and I have a better description of the stall.

Not temperature dependent. I've had stalls 2 miles from home.

The stalls occur whenever i am in Drive (overdrive) and dropping down to make a turn. When the car gets down to about 1.5k RPMs, it will stall out. I have to shift into neutral and rev the engine on start to keep it running. I do get some jerkiness in the range of 1.5k RPMs to about 2.5k RPMS. So, if i shift down into drive1 or drive2, i can keep the car running. The stalling will go away eventually and i can shift back up to overdrive (or drive) until the next event. These stalling events last around 3-5 minutes, then the car drives just fine. During the stall, i get no dimming of lights, the radio keeps running fine, etc.

Any help would be appreciated.
silver_SE is offline   Reply With Quote
Old 02-11-2009, 10:41 AM   #5
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Dec 2004
Location: Alabama
Posts: 51
Thanks: 0
Thanked 1 Time in 1 Post
silver_SE is on a distinguished road
Default

I keep forgetting details...

My gas mileage is bad... just checked this morning and i'm running about 21.4mpg... i have been getting 25-26mpg. Could be due to running in Drive1 or Drive2 intermitently...

Just another clue.
silver_SE is offline   Reply With Quote
Old 02-11-2009, 10:42 AM   #6
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

Kind of sounds like you TPS. Here is a test for that. Let us know if this helped. If you have any problems following it let me know and I'll tweek it a bit.

https://www.gmforum.com/t279319/
Danthurs is offline   Reply With Quote
Old 02-11-2009, 11:25 AM   #7
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

Which code did you get regardig the maf sensor?
BillBoost37 is offline   Reply With Quote
Old 02-11-2009, 11:34 AM   #8
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

If you suspect the MAF as being bad, you can unplug it and drive without it. Just drive normal and keep the acceleration down to half throttle or less. If the problem goes away, the MAF is bad. If no change, the MAF is fine. But I still suspect the TPS. If you hit a bad spot the PCM sees this as a rapid drop in the throttle possistion.
Danthurs is offline   Reply With Quote
Old 02-11-2009, 03:06 PM   #9
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Dec 2004
Location: Alabama
Posts: 51
Thanks: 0
Thanked 1 Time in 1 Post
silver_SE is on a distinguished road
Default

I'm working from memory here (not usually a good thing)...

I think I had the P0102 code...

What will happen if i disconnect my TPS? will the car still run?

I will try to do the TPS check out. It may be late tonight or tomorrow afternoon.

Thanks for your suggestions!
silver_SE is offline   Reply With Quote
Old 02-11-2009, 03:27 PM   #10
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

To do the TPS test you don't need to start the car or even turn on the ignition. Your only testing the change in ohms
Danthurs is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Ignition problems , stalling , tow trucks BonneBoy 1992-1999 3 10-31-2003 09:38 AM
MSD stalling problem merlin 1992-1999 1 05-24-2003 03:16 AM
1992 SSei Stalling Kevin 1992-1999 1 05-21-2003 02:42 PM
Help with 97 SE random stalling problem osx 1992-1999 8 09-30-2002 09:28 AM
Stalling solved; new problem with computer command ride jgssei 1992-1999 3 09-01-2002 11:46 AM


Tags
bonneville, crankshaft, ect, iat, sensor, stall, test, tps

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 06:13 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.