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Have a 2001 LW300 will crank over but not fire. Tach does…

Customer Question
Have a 2001 LW300...

Have a 2001 LW300 will crank over but not fire. Tach does not move at all when i crank it. serpentine drive belt does move when i crank it . Service motor soon light is also on

Mechanic's Assistant: What shape is the drive belt in? Do you know if it needs to be replaced, or just adjusted?

Drive belt is new.. also behaves like it is flooded when i crank it.. plus their is a TSB on my motor and year

Mechanic's Assistant: Are you fixing your LW300 yourself? What have you tried so far?

I believe the the main v6 might be at fault relay in the fuse box under the hood

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

Since that is the TSB is on as well

Submitted: 22 days ago.Category: Saturn
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Answered in 2 minutes by:
4/2/2018
Saturn Mechanic: Ronnie, ASE Certified Technician replied 22 days ago
Ronnie
Ronnie, ASE Certified Technician
Category: Saturn
Satisfied Customers: 37,782
Experience: 34 year as an ASE Tech
Verified

Hello. My name is ***** ***** I am happy to assist you today. Give me just a moment to review your post, and I'll be right back with the help you need.

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Saturn Mechanic: Ronnie, ASE Certified Technician replied 22 days ago

If the belt is not moving can you take a look and see if the crankshaft pulley is turning when you crank the engine over?

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Customer reply replied 22 days ago
the belt is moving
Customer reply replied 22 days ago
bran new belt
Customer reply replied 22 days ago
only 66 thousand miles on the vehicle, brand new batt also .
Customer reply replied 22 days ago
i am on disablity can not afford $26 phone call
Customer reply replied 22 days ago
2000 Saturn LS2 V6-3.0L VIN RTop - Vehicle
Technical Service Bulletins
. All Technical Service Bulletins
.. Engine - Intermittent Crank No Start/Multiple DTC's.NotesEngine - Intermittent Crank No Start/Multiple DTC'sBULLETIN NO: 00-T-28ISSUE DATE: May, 2000CATEGORY TYPE: Engine-10CATEGORY: Starting/ChargingCORPORATION NO: 00-06-03-002SUBJECT:
Intermittent Crank No Start with DTC P1780 Set in ECM History and/or U2105
Set in TCM or BCM History (Replace Main V6 Relay in Underhood Fuse Block [UHFB])MODELS AFFECTED:
All 2000 L-Series Sedans and Wagons built before VIN YY630765 equipped with V6 (RPO L81) enginesCONDITION:
Some customers may comment the engine intermittently cranks but will not start and Service Engine Soon telltale is illuminated.CAUSE:
The Main V6 Relay in the underhood fuse block (UHFB) intermittently may not function as designed.CORRECTION:
Replace the Main V6 Relay using the following procedure.PROCEDURE:1. Disconnect negative battery cable.2. Remove underhood fuse block (UHFB) cover.3. Remove Main V6 Relay.4. Install Main V6 Relay (P/N 12135170)5. Install UHFB cover.6. Connect negative battery cable.Torque:
Battery Terminal Bolt: 17 N.M (13 ft-lbs)PARTS REQUIREMENTS:
12135170 - Relay Asm-AcsryHope this helps.
Saturn Mechanic: Ronnie, ASE Certified Technician replied 22 days ago

Phone calls are offered by the website and not by me. We can do this from this post.Your first post said the belt is not moving, is that not correct?

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Customer reply replied 22 days ago
I CAN NOT AFFORD THE $26. I AM ON DISABILITY
Customer reply replied 22 days ago
No i said the car will crank but not fire! Tac does not move when i try to crank it.... the belt doses move when i crank it
Saturn Mechanic: Ronnie, ASE Certified Technician replied 22 days ago

Okay thank you for the clarification, Have you scanned the computer to see what code is set when the service engine light is on?

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Customer reply replied 22 days ago
do not have a computer to plug into the port in the car
Customer reply replied 22 days ago
i had to be towed home.. yesterday
Saturn Mechanic: Ronnie, ASE Certified Technician replied 22 days ago

I suspect because you have no Tack signal that you likely have a failing crankshaft position sensor which will cause a no start as well but before you start replacing any parts you need to see what the fault code is that setting.

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Customer reply replied 22 days ago
only 66 thousand miles on vehicle .. owned by father in law who brought vehicle new.. was kept in the garage at night
Customer reply replied 22 days ago
vehicle acted like it was flooded when i did turn it over after a few times... the tach on the dash did not move at all..
Customer reply replied 22 days ago
which might tell me no juce to the curcity
Saturn Mechanic: Ronnie, ASE Certified Technician replied 22 days ago

Okay but I still suspect you may have a bad crankshaft position sensor, the Tack gets is signal from the crank sensor. A code scan would verify if in fact that is the case.

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Customer reply replied 22 days ago
ok where is the sensor located? i can check with my Ohm meter
Saturn Mechanic: Ronnie, ASE Certified Technician replied 22 days ago

The sensor is located on the lower left front of the engine at the crankshaft. See the link below.

https://www.dropbox.com/s/zb3domyig3cedst/cranshaft%20posi%20Apr%202.pdf?dl=0

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Customer reply replied 22 days ago
ok i got it
Customer reply replied 22 days ago
right next to the oil filter
Customer reply replied 22 days ago
what about the TSB on the mail V6 Relay?
Customer reply replied 22 days ago
Main V6 Relay
Saturn Mechanic: Ronnie, ASE Certified Technician replied 22 days ago

The sensor is tested with a volt meter to see if is producing a output voltage while cranking. It should be 1.0 volts AC. There is no TSB that applies to the main relay on your 2001, if it was failing you would usually not see a service engine light on.

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Customer reply replied 22 days ago
what about this TSB? I have this motor in my vehicle All 2000 L-Series Sedans and Wagons built before VIN YY630765 equipped with V6 (RPO L81) enginesConditionSome customers may comment the engine intermittently cranks but will not start and Service Engine Soon telltale is illuminate.
Saturn Mechanic: Ronnie, ASE Certified Technician replied 22 days ago

I'm not sure you are reading my post and not sure I can help you on this without doing so. Ill open this back up for you and perhaps someone else can give you a quick fix with not testing.

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Customer reply replied 22 days ago
I am reading your post.. and do thank you
Customer reply replied 22 days ago
will check the crank shaft with my meter..
Customer reply replied 22 days ago
Hello????????
Saturn Mechanic: david craig, Saturn Mechanic replied 22 days ago
david craig
david craig, Saturn Mechanic
Category: Saturn
Satisfied Customers: 5,165
Experience: owner/mechanic at 3D Automotive
Verified

Have you checked the output voltage of the crankshaft position sensor?

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Customer reply replied 22 days ago
NO ON DISABILITY CAN NOT AFFORD THE $26 PHONE CALL
Customer reply replied 22 days ago
The other guy I talked to said he thought it might be the Crank Shaft Sensor..
Saturn Mechanic: david craig, Saturn Mechanic replied 22 days ago

I am not asking for a phone call! now please answer my question.

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Customer reply replied 22 days ago
ok sorry .... not yet.. it is raining outside and waiting for the rain to end...
Saturn Mechanic: david craig, Saturn Mechanic replied 22 days ago

back probe the crankshaft sensor on the yellow wire while someone cranks the engine. it should read around 1 volt ac

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Customer reply replied 22 days ago
ok will do..
Customer reply replied 22 days ago
any other ideas?
Customer reply replied 22 days ago
this happened last thursday then it started up and ran fine all weekend long until yesterday afternoon
Saturn Mechanic: david craig, Saturn Mechanic replied 22 days ago

not until we see if the signal is there. let me know when you do it.

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Customer reply replied 22 days ago
ok will have to come back to you after it stops raining here...
Customer reply replied 22 days ago
i see it located right next to the oil filter..
Saturn Mechanic: david craig, Saturn Mechanic replied 22 days ago

yes

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Customer reply replied 22 days ago
any other ideas as well? the vehicle was made in April of 2001 would that be a 2000 model or 2001 production model?it does say 2001 on the vin
Customer reply replied 22 days ago
but motor and tranny wise
Saturn Mechanic: david craig, Saturn Mechanic replied 22 days ago

Im not going to worry about any other possibilities until I know if the sensor is ok or not. thank you

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Customer reply replied 22 days ago
ok thank you... guess will have to wait.. i guess will have to come back to you after the rain has stoped
Saturn Mechanic: david craig, Saturn Mechanic replied 22 days ago

Ill be here

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Customer reply replied 22 days ago
ok thank you.. how do i get back to you later ???
Saturn Mechanic: david craig, Saturn Mechanic replied 22 days ago

right here

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Customer reply replied 22 days ago
ok so i pay the $$$ again then
Saturn Mechanic: david craig, Saturn Mechanic replied 22 days ago

no more charges

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