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Author Topic: Hard to start when hot  (Read 10075 times)

Offline storky

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Hard to start when hot
« on: 03 February 2011, 16:35 »
Hi all,

Couldnt find an answer in the search section. Got a 1991 8v GTi. Starts fine from cold but takes ages to start when engine is warm. It did this on both the old and new engine.

Any ideas??

Thanks

Jon
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Offline the_stink

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Re: Hard to start when hot
« Reply #1 on: 03 February 2011, 16:36 »
Starter motor?

mine did a similar thing would start from cold but then the starter motor would seize when hot had to replace it with a new bosch one and never had any issues since  :smiley:
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Offline mk2bal

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Re: Hard to start when hot
« Reply #2 on: 03 February 2011, 16:55 »
Leaking injector/injectors?
Could be flooding the engine if they weep or drip..
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Offline tech1889

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Re: Hard to start when hot
« Reply #3 on: 03 February 2011, 17:25 »
the above sounds unlikely to me it happens on a lot of cars and tends to be start motors wearing out..  not saying the injectors cant leak..
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Offline storky

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Re: Hard to start when hot
« Reply #4 on: 03 February 2011, 17:49 »
Ok thanks guys. Not a huge problem, just seems to take a while to fire when hot. A little dab of the throttle usually helps it?
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Offline emery1990

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Re: Hard to start when hot
« Reply #5 on: 03 February 2011, 18:38 »
Mine done it all the time! used to get out at petrol stations and whack my starter with my wheel wrench! was a bit embarrassing! 
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Offline mk2bal

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Re: Hard to start when hot
« Reply #6 on: 04 February 2011, 13:21 »
Tech- it depends what he means by hard 2 start!! Slow turning starter when hot-yeah fair enuff prob the starter, but if it spins at the same speed but won't start then I'd say its the injectors/fuelling issues..
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Offline Mr Blue

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Re: Hard to start when hot
« Reply #7 on: 04 February 2011, 15:17 »
First start with the a new blue coolant temp sensor. Approx £15 from VW.
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Offline Alec

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Re: Hard to start when hot
« Reply #8 on: 05 February 2011, 03:35 »
Quote from: mk2bal on 04 February 2011, 13:21
Tech- it depends what he means by hard 2 start!! Slow turning starter when hot-yeah fair enuff prob the starter, but if it spins at the same speed but won't start then I'd say its the injectors/fuelling issues..

Yep, mine was the same at the same time as my idle issues started. Would start turn of the key when cold and once warm if I stopped at the shops and went to start it again it was cranking just fine but took ages to start again, when it did cough a bit I had to coax it into life with dabs of throttle. Revs would usually hunt up to about 1500 - 2000rpm when it got running again aswell until being revved or driven through first gear.

Replacing the blue temp sensor for a genuine VAG item did seem to cure the hot start problem, but not the idle issue  :sad:
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Offline mr mk2

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Re: Hard to start when hot
« Reply #9 on: 06 February 2011, 09:21 »
i had a similar problem with my first mk2 if i remember rightly it was a fuel problem too lean
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