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Old 02-17-2019, 01:24 AM   #41
fdryer
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2003 L-Series 3.0L Sedan
Default Re: 2001 LW300 keeps stalling - please help!

Was your engine serviced with this mod - Service Engine Soon (SES) and/or Reduced Power Lamp Illuminating Following Cold Engine Start Up In Subfreezing Temperatures with Diagnostic Trouble Codes (DTC) P0638, P1510 and/or P1516 Stored in ECM #04-06-04-085 - (Nov 22, 2004)?

Condition

Some customers may comment on the Service Engine Soon (SES) and/or Reduced Power lamp illuminating and limited throttle response immediately following cold engine start up during subfreezing temperatures. Diagnostic trouble codes (DTC) P0638 or P1510 and/or P1516 may be stored in the engine control module (ECM).

Cause

This condition may be caused by crankcase vapors inside the throttle body collecting at the throttle plate base as engine cools down while shut off, resulting in restricted throttle plate movement immediately following cold engine start up during subfreezing temperatures.

Correction

Re-locate primary positive crankcase ventilation (PCV) hose from throttle body to intake manifold upper plenum. Refer to service procedure in this bulletin.


If you need more info (11 page service bulletin) pm me your email address allowing file attachment.
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File Type: jpg intake plenum mod-2.jpg (127.4 KB, 10 views)
File Type: gif intake plenum mod-3.gif (41.6 KB, 10 views)
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Old 02-21-2019, 07:50 PM   #42
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2001 L-Series 3.0L Wagon
Default Re: 2001 LW300 keeps stalling - please help!

Quote:
Originally Posted by fdryer View Post
Was your engine serviced with this mod - Service Engine Soon (SES) and/or Reduced Power Lamp Illuminating Following Cold Engine Start Up In Subfreezing Temperatures with Diagnostic Trouble Codes (DTC) P0638, P1510 and/or P1516 Stored in ECM #04-06-04-085 - (Nov 22, 2004)?

Condition

Some customers may comment on the Service Engine Soon (SES) and/or Reduced Power lamp illuminating and limited throttle response immediately following cold engine start up during subfreezing temperatures. Diagnostic trouble codes (DTC) P0638 or P1510 and/or P1516 may be stored in the engine control module (ECM).

Cause

This condition may be caused by crankcase vapors inside the throttle body collecting at the throttle plate base as engine cools down while shut off, resulting in restricted throttle plate movement immediately following cold engine start up during subfreezing temperatures.

Correction

Re-locate primary positive crankcase ventilation (PCV) hose from throttle body to intake manifold upper plenum. Refer to service procedure in this bulletin.


If you need more info (11 page service bulletin) pm me your email address allowing file attachment.
This is a great find fdryer. Thank you!
No, the car was never serviced for this Service Bulletin. There's a definite possibility that this could be the issue. While the car was acting up, I turned it off and messed with (twisted and squeezed) the PCV line and restarted the car. It has run perfectly since then. Now I'm waiting for it to act up again and while the car is running I'll disconnect the hose and reconnect it to see if there's any change. I figure I need to test it a little more before drilling holes, etc.

I was able to get the entire bulletin and forwarded it to my mechanic. As soon as it acts up again, I'll get you an update.

Thank you again!
Rich
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Old 05-01-2021, 03:33 PM   #43
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2001 L-Series 3.0L Wagon
Default Re: 2001 LW300 keeps stalling - please help!

Well, it's been a couple of years since I gave any kind of update. We've been continuously trying to diagnose and fix the old Saturn.

Multiple mechanics have tried and failed at figuring out what the hell is wrong with this thing. All of them ruled out the crank case vapor in the throttle body, because of the frequency and consistency of the problem.

We went through all of the wiring (again), but this time found a small section where a rodent had chewed through some of the wiring insulation. We repaired it, started her up and it boom - it was running beautifully. After ~300 miles, it started throwing codes, going in to limp mode and stalling. Just like it has always done.

After spending too many years and WAY too much money, I'm finally throwing in the towel. The Saturn won!

If anyone knows someone that is looking for a project or parts car, please hit me up. I'm in Oakland CA. If no one reaches out, I'm afraid I'm going to be donating the old lemon.

Sincerely,
Rich aka FedUpSaturnGuy
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Old 05-02-2021, 05:51 PM   #44
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Default Re: 2001 LW300 keeps stalling - please help!

It's unfortunate to read about frustrations and giving in. It also points to the inability of local repair shops in determining where the problem lies. Experts are out there among the field of inept mechanics and techs unwilling to continue learning of changing technology.
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Old 05-03-2021, 07:10 PM   #45
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Default Re: 2001 LW300 keeps stalling - please help!

well if you may be turning it into a donor car, may i ask if you have a front lower spoiler, passenger's mirror, front and rear left doors and a driver's side front fender?
...
2002 L200 "Rattler" 67,765 - 5/12/2021 (Mileage As Of Date)
2006 Kia Sorento EX "Workhorse" 91,046 - February 2021 (Mileage As Of Memory)
1989 Toyota Van CRG 268,030 - July 2021 (Mileage As Of Date)
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Old 05-31-2021, 02:27 PM   #46
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Default Re: 2001 LW300 keeps stalling - please help!

Hi SelfEmploydL200
Yup - It still has everything. Other than the whole stalling issue, the car is awesome.
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Old 09-12-2021, 03:56 PM   #47
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Default Re: 2001 LW300 keeps stalling - please help!

Well, unfortunately, it looks like this is the week. I'm going to be donating the Saturn

I guess this is my one last attempt at figuring this thing out. I'm 90% sure something chewed through some wiring somewhere in the car. I just don't know how to find the damaged wire. It has to be in a hidden location since so many mechanics have looked and haven't been able to locate it.

The car is 20 years old with only 75 original miles on it. I'd love to get it back on the road. I know it's got many more years left in it, if I could just find this one problem. There is absolutely nothing else wrong with it except for being dirty.

Does anyone have any last ideas or suggestions before I pull the trigger and send her off?
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Old 09-13-2021, 11:03 AM   #48
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2000 L-Series 3.0L Sedan
Default Re: 2001 LW300 keeps stalling - please help!

Can you make a short video of the problem occurring? Driving and then poke under the hood.

I believe the problem is an intermittent ground loss or voltage loss. You could put a volt meter across points that should be common and see if you find a voltage. If voltage is found across two common ground points, the voltage to components would be degraded causing normal function to cease.

Likewise, you could measure source voltage on all components for Vbattery to determine if those circuits have adequate voltage.

Lastly, rest for voltage across each fuse and relay to determine if they are dropping any voltage.

Too bad you don't live near South Main Auto https://www.youtube.com/c/SouthMainA...irAvoca/videos He could diagnose this problem and it would be interesting to watch him find it.
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Old 09-13-2021, 11:34 AM   #49
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Default Re: 2001 LW300 keeps stalling - please help!

(Reposted because I was unable to edit this post)

Can you make a short video of the problem occurring? Driving and then poke under the hood.

I believe the problem is an intermittent ground loss or voltage loss. You could put a volt meter across points that should be common and see if you find a voltage. If voltage is found across two common ground points, the voltage to components would be degraded causing normal function to cease. Measure voltage between the Negative battery post and the engine block. If you measure any voltage the engine ground is bad.

Likewise, you could measure source voltage on all components for Vbattery to determine if those circuits have adequate voltage.

Test for voltage across each fuse and relay to determine if they are dropping any voltage.

You could perform the same with power removed, disconnect negative battery terminal and measure the continuity between points across known wire runs. It will take long leads on your volt meter. If you find more than a few ohms on a common points... there's your problem.

Too bad you don't live near South Main Auto https://www.youtube.com/c/SouthMainA...irAvoca/videos He could diagnose this problem and it would be interesting to watch him find it. There are likely more than one problem creating the cluster of symptoms.
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Old 09-18-2021, 03:59 PM   #50
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Default Re: 2001 LW300 keeps stalling - please help!

Thanks RJ2000,

It took me all week to charge the battery. All charged up and she's running fine. Idles perfectly. No codes, etc.

I'll try testing per your directions today, but I have to say, I had an electronics specialist go through every connector and wire and he couldn't find anything weird. He spent three days and was so frustrated that he couldn't figure it out he refused to charge me a cent.

I'll give a go though. Thank you!
Rich
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Old 09-19-2021, 07:53 PM   #51
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Default Re: 2001 LW300 keeps stalling - please help!

Okay, I tested all components and wires and grounds I could find and everything tested out fine. I took her out for a spin and went 3 miles surface and then got on the freeway - at mile 3.6 it went into limp-mode. I had to clear the codes twice and restart twice and then it started running fine again.

Codes:
P0606 - Control Module Processor
P0221 - Throttle/Pedal Position Sensor/Switch "B" Circuit Range/Performance

Still no clue what's going on.

Thanks,
Rich
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Old 09-23-2021, 12:55 PM   #52
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Default Re: 2001 LW300 keeps stalling - please help!

It with a heavy heart... The Saturn has been donated. Hopefully she'll find her way to a nice home

Thank you Everyone for all of your help. I truly appreciate it.
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