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Author Topic: Help!! mk3 golf gti suddenly won't start?  (Read 5783 times)

Offline rubjonny

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Re: Help!! mk3 golf gti suddenly won't start?
« Reply #10 on: 04 January 2011, 10:18 »
if its a latyer one without an isv then id say crank sensor perhaps, but try coil and ecu/fuewl relays 1st tho. also if it later one without the coil disconnect the hall sensor and see if that helps
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Offline muzo26

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Re: Help!! mk3 golf gti suddenly won't start?
« Reply #11 on: 05 January 2011, 17:03 »
  O.k will do got some new relays coming today just incase i was sold dodgey ones. The spark plugs have got a sparks so could i rule out the coil and crank sensor?
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Offline muzo26

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Re: Help!! mk3 golf gti suddenly won't start?
« Reply #12 on: 05 January 2011, 20:21 »
 Just an update, car still won't start checked oil level, pressure and sensors all fine.
      Can anyone tell me how to check the temp sensor? as i think the car is overfuelling, i have used nearly a quater of a tank of petrol just trying to get her started. And would i be correct in saying the temp sensor tells the ecu how much petrol should go through engine on startup.
      I noticed the last couple of weeks that i have been using more petrol than i usually do, and the day before she decided that she would not start she was running like a pig on 3 cylinders.
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Offline javalin

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Re: Help!! mk3 golf gti suddenly won't start?
« Reply #13 on: 06 January 2011, 14:53 »
try with it unplugged - should default to std-cold-engine-mix.  Also check out this resistance table (stolen from a previous thread on here :-) )

http://javalins.wordpress.com/vw-golf-mk3/component-testing/

James
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You only ever need two tools in life. If it moves and it shouldn't use Duct Tape. If it does not move and it should, use WD40.

Offline muzo26

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Re: Help!! mk3 golf gti suddenly won't start?
« Reply #14 on: 07 January 2011, 17:11 »
Another update, car still won,t start changed both relays again unplugged the temp sensor because i thought it was overfueling but no joy. the car sounds like it wants to start because when turning it over it sounds like only 2 cylinders are firing and the revs pick up to about 600rpm but shuts down once i let the key go. Any suggestions please?
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Offline javalin

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Re: Help!! mk3 golf gti suddenly won't start?
« Reply #15 on: 08 January 2011, 13:03 »
that sounds ignition related.  Sure your plugs, leads and dizzy cap & arm are ok?

J
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You only ever need two tools in life. If it moves and it shouldn't use Duct Tape. If it does not move and it should, use WD40.

Offline Khare

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Re: Help!! mk3 golf gti suddenly won't start?
« Reply #16 on: 08 January 2011, 14:59 »
Yes it could be coil even if there is a spark. It could be a weak spark so it tries to start, and wants to go but because it's weak it won't fully come on.

I'd try the coil pack
http://www.golfgtiforum.co.uk/index.php?topic=176502.0

^^ one for sale for a tenner.
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