Stalls out sometimes

Tiny
GARYW515
  • MEMBER
  • 2001 PONTIAC MONTANA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 178,000 MILES
My wifes vehicle stalls out when you drive sometimes. Will Idle perfectly and some times run well. Have replaced fuel pump and fuel filter. When it stalls its like it is starving for fuel.

Thanks.
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Wednesday, October 28th, 2009 AT 7:26 PM

37 Replies

Tiny
F4I_GUY
  • EXPERT
This sounds like a classic crankshaft angle sensor that is going bed here is a guid to help you see step by step what to do with a diagram below to show you on your car.

https://www.2carpros.com/articles/crankshaft-angle-sensor-replacement

this guide can help as well

https://www.2carpros.com/articles/car-cranks-but-wont-start

Check out the diagrams (Below). Please let us know what happens.

Cheers
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Wednesday, October 28th, 2009 AT 7:47 PM
Tiny
GARYW515
  • MEMBER
Engine wants to stall when throttling, will idle fine. No codes present on vehicle. No fuel smell. Plugs were changed about 6 months ago, new wires also. Doe, s not stall completely out more like a hesitating condition under load.
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Thursday, October 29th, 2009 AT 7:15 PM
Tiny
ETHILL3
  • MEMBER
Thanks for this post I got a new crankshaft sensor for $76.00 never had the problem again I love this site.

Thanks
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Tuesday, December 15th, 2009 AT 8:16 PM
Tiny
DTMENZIA
  • MEMBER
  • 2001 PONTIAC MONTANA
  • 6 CYL
  • AWD
  • AUTOMATIC
  • 113,000 MILES
2001 Pontiac Montana

I went today to take my daughter to work and the van started fine. Started to back out of driveway and it shut off and battery light came on. It restarted every time, but then would just shut off right away. I'm just not sure whats going on.
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Thursday, October 11th, 2018 AT 7:31 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • EXPERT
HAs the check engine light come on? Have you checked fuel pump pressure?
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Thursday, October 11th, 2018 AT 7:31 PM (Merged)
Tiny
MECHONIS
  • MEMBER
  • 2001 PONTIAC MONTANA
  • AUTOMATIC
  • 125,000 MILES
My 2001 montana extended suddenly started stalling. It would start right up again. After two weeks, one time it stalled and wouldn't start till. The next morning it started fine again. Now it is still stalling and very difficult to start. Are the stalling and not starting one problem or two? Could the stalling be caused by a bad ignition switch-a mechanic suggested this but I don't understand what the ignition has to do with stalling once the car is started.
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Thursday, October 11th, 2018 AT 7:31 PM (Merged)
Tiny
HMAC300
  • EXPERT
Check fuel pressure with a gauge auto parts rent it. Then clean the throttle plate on both sides an diac hole with choke cleaner.
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Thursday, October 11th, 2018 AT 7:31 PM (Merged)
Tiny
MECHONIS
  • MEMBER
Thanks. Will this take care of both the stalling and not starting?
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Thursday, October 11th, 2018 AT 7:31 PM (Merged)
Tiny
HMAC300
  • EXPERT
I tmight yo didn't say if check engine light was on or not. Low fuel pressure causes tehse type of problems.
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Thursday, October 11th, 2018 AT 7:31 PM (Merged)
Tiny
WALLY83
  • MEMBER
  • 2001 PONTIAC MONTANA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 178,000 MILES
Hi I have a 2001 montana and it's stalling backfireing cutting out during aceleration. Please help
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Thursday, October 11th, 2018 AT 7:31 PM (Merged)
Tiny
WALLY83
  • MEMBER
I put a new fuel filter on and the old one was so pluged I couldn't blow through it. When I dumped the excess gas out of the filter it was black and had black debree in it. The van work good for a couple of days. I thought it was fixed then it started doing the samething I run a tank of injection cleaner though it then filled it with high test gas hasn't acked up yet but i'm only on the second tank since the filter and injection cleaner.
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Thursday, October 11th, 2018 AT 7:31 PM (Merged)
Tiny
WALLY83
  • MEMBER
Well that didn't fix it but what the problem was a egr valve sticking open well what a fun job 3 hours later and hands all scrathed up.
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Thursday, October 11th, 2018 AT 7:31 PM (Merged)
Tiny
MONTEMA
  • MEMBER
  • 1999 PONTIAC MONTANA
I have been having a prob with 1999 pontiac montana van. After I have been driving for a while and the engine gets warmed up, when I stop, or put the can in park, it dies. The idle goes up and down and then it just dies. The dealer cant find anything wrong on the computer. They have suggested injector cleaning. This weekend we were coming home and the engine light came on. I put in 90 gas instead of 89. I dont know if that would affect it. Let me know if you have any ideas on it thanks
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Thursday, October 11th, 2018 AT 7:32 PM (Merged)
Tiny
SERVICE WRITER
  • EXPERT
You don't have to go top the stealer, many independent garages can help.

Anyways the 3.4 motor is common for intake manifold leaks. My guess the check engine light will help reveal that. One way to check the intake gasket for leaks is to spray carb cleaner or similiar around the gasket and listen for an idle change. I have heard of using an unlit propane torch to do the same. The thought makes me a little nervous though.

Don't procrastinate on this, if the gasket rupture in other ways, serious damage to the motor can results. I have seen these suck oil or coolant into the combustion chamber and the low fluids create expensive problems.

One more thought- Use whatever octane the truck calls for. The PCM expects it. Check owner's manual if not sure.
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Thursday, October 11th, 2018 AT 7:32 PM (Merged)
Tiny
NIKKIH537
  • MEMBER
  • 1999 PONTIAC MONTANA
  • 192,000 MILES
Oil light comes on, then it shuts off while I'm at a stop light. It starts back up. Couple hours later shut off on me after exiting highway. It Will crank but won't hold a start and engine is loud then it shuts off again.
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Thursday, October 11th, 2018 AT 7:32 PM (Merged)
Tiny
RASMATAZ
  • MEMBER
Check the oil pressure with a gauge and also the oil pressure switch-Sounds like engine bearings
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Thursday, October 11th, 2018 AT 7:32 PM (Merged)
Tiny
NMO
  • MEMBER
  • 2000 PONTIAC MONTANA
  • 162,000 MILES
When I start it when cold idles alright for a minute then starts idleing up and down until it dies once you take off doesnt do it anymore but idles low and shakes
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Thursday, October 11th, 2018 AT 7:32 PM (Merged)
Tiny
RASMATAZ
  • MEMBER
Clean out the idle air control valve and see what happens
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Thursday, October 11th, 2018 AT 7:32 PM (Merged)
Tiny
ED_DYLP
  • MEMBER
  • 2002 PONTIAC MONTANA
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 87,000 MILES
My 2002 pontiac montana has been hesitating, misses and stalling. Would a TPS sensor cause this? I've replaced the preconverter o2 sensor ( the one that affects pcm and air/fuel ratio) and still problems. Heres the thing it runs fine until it warms up. I can rev it in park and its fine warm. I go to test it and drive down the road and starts all over again. If I dont accelerate too much I can make it back home. Would the post converter cause this problem? I hooked up a scan tool and read the parameters to the postconverter o2 sensor and the voltages aren't what the car manual says. It says it should hover around 0.40 volts and change slightly however my readings indicate that its around.59 and when I accelerate it goes below 0.40 volts. Is this normal or is it something else as the price of an o2 sensor is $150 and I already bought the wrong one! Thanks
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Thursday, October 11th, 2018 AT 7:32 PM (Merged)
Tiny
BOATBUDDY
  • MEMBER
A bad Tps sensor usually makes the rpm's bounce around. Is there a MIL light on?
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Thursday, October 11th, 2018 AT 7:32 PM (Merged)

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