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VS Commodore issues.

Started by _mello92_ , Mar 10 2010 01:06 AM

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50 replies to this topic

#1 _mello92_

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Posted 10 March 2010 - 01:06 AM

Using the trusty "when in doubt, consult the forum!" type attitude, I thought it may be worth a shot at posting this.

Problem is: My brothers VS V6 Auto Commodore cranks over but wont start. Only does it when hot (up to normal operating temp). You can crank the bugger for years, but it wont start. If your lucky, there is the occasional fire and it will turn over by itself (but not completely start) for 1 second before dying. Yes its got fuel, yes its got oil, plug leads are on properly, Ive checked all the obvious things. By the way, this car is completely stock.

Leave it too cool down for 35mins or so (about the time it takes for RACQ to arrive), and it starts first time.

Im thinking fuel pump/relay or crank angle sensor maybe??

Would appreciate it if you can point me in the right direction before we get d**ked around my mechanics.

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#2 ls2lxhatch

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Posted 10 March 2010 - 01:13 AM

Faulty temperature sensors can make engines difficult to start.

This is an LS2 hard start guide.

Edited by ls2lxhatch, 10 March 2010 - 01:14 AM.

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#3 _Gunmetal LH_

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Posted 10 March 2010 - 01:52 AM

Sounds like it's your crank angle sensor behind the harmonic balancer. Chuck a bucket of water on it (cools it) and it should start.

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#4 FastEHHolden

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Posted 10 March 2010 - 08:41 AM

^^^word

it should cost about $60 and be easy to change yourself.

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#5 Neils LX

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Posted 10 March 2010 - 09:35 AM

Hi

Not sure about the temp sencer but def sounds like a typical crank angle sencer.

Chears Neil

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#6 Collo

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Posted 10 March 2010 - 09:41 AM

Yep, I'd go with the crank angle sensor. Not hard to change.

FastEH, where you buying yours at? I paid $35 I think for the last one I bought.

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#7 FastEHHolden

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Posted 10 March 2010 - 10:08 AM

there you go..last I bought one was 5 yrs back....some sensors are dirt cheap...just pray you dont sh1t an ABS module.

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#8 _mello92_

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Posted 10 March 2010 - 11:37 AM

Thanks very much fellas!!

Will have to get ontop of it now that I know what it is!

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#9 _Woodsy_

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Posted 10 March 2010 - 01:48 PM

Mello, have you done a fault code check? Drivers side under the steering column, if you poke your head infront of the seat you will see it. Get a paper clip and put 1 end in hole 5 and the other in hole 6. They are the top row from the left. Then put the ignition onto reds and the engine light will blink.

FLASH..........FLASH FLASH gives you the code of 12 which means nothings wrong etc.

You get me?

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#10 _Gunmetal LH_

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Posted 10 March 2010 - 01:51 PM

To clarify- pour water over the FRONT of the engine so it cools the crank angle sensor. Not all over, don't go chucking water on hot exhaust- may crack.

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#11 _mello92_

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Posted 10 March 2010 - 02:04 PM

Yep, I understand Josh. Will report back when I test it.

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#12 xu1kid

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Posted 10 March 2010 - 02:05 PM

it could be your coil pack or the module underneath the coil pack had it happen before

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#13 _torana_

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Posted 10 March 2010 - 04:22 PM

you checked fuel and oil, did you check spark?

if not try the following.

pull a lead and put a spark plug in it and rest on your manifold (so plug is earthed) and check for spark.

Youll soon see if its electrical.

cheers Julian

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#14 _mello92_

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Posted 10 March 2010 - 07:04 PM

Having followed your advice Josh, I cant figure out what Im supposed to be sticking the paperclip into? What is this object?

Julian, yes its got fuel and oil.

Cant check spark, havent got the spanners here at uni......

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#15 _ChevLX_77_

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Posted 10 March 2010 - 08:30 PM

just pull the two leads off one of the modules and they should ark together to check spark.

personal experience tells me crank angle sensor.

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#16 _Woodsy_

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Posted 10 March 2010 - 09:26 PM

Here you go Mello.

These pics from Just Commodores Website, Not of my car.
Posted Image

Or visit here
Just Commodores

Edited by Woodsy, 10 March 2010 - 09:28 PM.

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#17 _mello92_

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Posted 10 March 2010 - 09:45 PM

You are a helpful man! Thank you!

I wont tell you what I took apart... LOL!

Staring me straight in the face! Posted Image

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#18 _torana_

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Posted 10 March 2010 - 11:29 PM

Julian, yes its got fuel and oil. Cant check spark, havent got the spanners here at uni......

heres another way of doing it mate.

you can also take a lead off the sparkplug and put a screwdriver in it (phillip heads fit nice) and rest it on your block or any earth of your car (make sure the metal of the screwdriver isnt touching anything but the plastic handle is and also the screwdriver shaft has a couple of mm gap to metal) Kick it over and it will spark from the shaft of the screwdriver to the block.

has got me out of the shit a couple of times.

cheers Julian

Edited by torana, 10 March 2010 - 11:31 PM.

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#19 _mello92_

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Posted 10 March 2010 - 11:48 PM

Sounds like a good one.

Will try it tomorrow after I check the fault code man.

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#20 _Gunmetal LH_

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Posted 11 March 2010 - 01:15 AM

*puts $10 on CAS* :stirpot:

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#21 rexy

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Posted 11 March 2010 - 09:32 AM

As most have said, it will be the crank angle sensor. Check with the water cooling trick before you go and kill the ignition system. Water goes on the front of the crank where you see the wiring leading to the sensor.
R

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#22 _mello92_

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Posted 11 March 2010 - 12:09 PM

OK fellas, I'll try the cooling trick first.

And the fault code check.

Cheers.

Edited by mello92, 11 March 2010 - 12:11 PM.

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#23 _wraith75_

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Posted 11 March 2010 - 08:15 PM

Ill put a $10 on the CAS as well iv had 2 vs commos and both have had it go on them .

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#24 robd74

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Posted 11 March 2010 - 09:33 PM

Hi, I had a VR with exactly the same problem. To confirm what everyone has said, I changed the Crank Angle Sensor and I had the car for another 5 years without the problem showing its face again.