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Board index » Technical Chat » Engine, Gearbox & Diff




help need asap

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 Post subject: help need asap
 Post Posted: Sun Sep 02, 2007 11:33 pm 
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Astra Member
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Joined: Sat Jun 30, 2007 9:56 pm
Posts: 18
Location: TASSIE
i have a vk efi ant it wont fire,i got fuel pressure and fuel,spark is strong and ecu is working

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 Post Posted: Fri Sep 14, 2007 10:21 pm 
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Joined: Tue Sep 26, 2006 9:30 pm
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Location: South Australia
could be alternator or screwed up timing. bit of a mystery really, i dunno!

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 Post Posted: Mon Sep 17, 2007 12:26 am 
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Location: Melbourne, VIC
maybe try putting in new leads, plugs and dizzy cap?


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 Post Posted: Sun Sep 23, 2007 3:33 pm 
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Joined: Tue Sep 26, 2006 9:30 pm
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Location: South Australia
Its efi so it doesnt have a dizzy cap! But the leads might be a problem. all it takes is one to throw the engine off on a cold start. Check if the leads are well connected to the coil pack i have a friend who had a problem like that and it turns out that when he got itserviced the didnt push the leads onto the coil pack down enuf, how dodgy is that!

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 Post Posted: Tue Nov 20, 2007 11:00 pm 
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Calais Member

Joined: Tue Nov 01, 2005 6:18 pm
Posts: 169
Location: Western Australia.
Possibly the cam timing.It's possible the fibre cam gear is split or missing gear teeth and has thrown your timing right out.

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 Post Posted: Wed Nov 21, 2007 3:52 pm 
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Joined: Wed Nov 21, 2007 3:48 pm
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IF YOU HAVE A TEST LIGHT TRY THE ALTERNATOR, THATS MY BEST BET


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 Post Posted: Thu Nov 22, 2007 2:13 am 
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Calais Member

Joined: Tue Nov 01, 2005 6:18 pm
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Location: Western Australia.
Alotstra the VK fuel injected inline 6 does have a distributor,the coil pack started with the VN V6.

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 Post Posted: Wed Dec 19, 2007 12:22 am 
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Joined: Tue Dec 18, 2007 11:21 pm
Posts: 2
Check the engine temperature sensor.
Its blue, has a square blue plug and loctated about 1/3 along the engine from the front on the passengers side.
With time they get brittle and are prone to failure due to its location so close to the extractors and block, getting rather hot.
If this has failed your injection loop thinks the engine is excessivly hot and will screw out the air/fuel mixtures into next week so much that the engine wont even fire.

The sensors are pretty cheap, readily available at Holden dealerships and are also used on the VN series 1 v6 engines.

Hope this helps

Drew


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 Post subject:
 Post Posted: Fri Dec 21, 2007 10:15 pm 
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Joined: Tue Dec 11, 2007 3:37 am
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Location: Brisbane
If you have spark at the end of the plug leads you can pretty much rule out ignition. If you have fuel pressure in the fuel rail - they have a valve in the rail to test this I believe, then the next thing to check is if the injectors are 'pulsing'. You can check this by using a stethoscope or long screwdriver up against your ear and crank the engine and listen for clicking noise of the injector. If no clicking the problem is computer or sensor related. If the injectors are functioning and you are sure that spark is good I would be testing fuel pressure with a guage.
That's the way I would attack it anyway. :D

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 Post Posted: Wed Jan 16, 2008 10:52 pm 
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Joined: Sun Dec 30, 2007 5:09 pm
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Location: qld
Isit a V8. Our VR had that problem and it was the Hall Sencor in the disy.


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