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Model specific boards => Golf mk3 => Topic started by: Ninj on 26 November 2011, 08:15

Title: Mk3 takes a bit of starting when hot
Post by: Ninj on 26 November 2011, 08:15

Don't think this is the normal GTi starting issue............

Starts within a second or so when cold/been stood for a bit but takes about 3/4 secs of cranking when its been run/hot.  Id say its getting slowly worse over the last few months.

Ive noticed if you quickly hit the starter, ign off and restart it fires up quicker than letting it churn away.  Never cuts out or runs badly when hot or cold for that matter, just the starting prob.

Any ideas?

I'm thinking fuel related almost as though its evaporating or airlocking somewhere and it's needing a good squirt from the pump to fire it up.  Checked the usual suspect relays and none of them are cold.  Could it be the coolant temp sensor (or do I mean ECU temp sensor!)?  Is there a way to check it?

Thanks in advance

Title: Re: Mk3 takes a bit of starting when hot
Post by: harlemex on 27 November 2011, 21:19

I had this issue. Never got to the bottom of it.  :sad:

Title: Re: Mk3 takes a bit of starting when hot
Post by: Seanl on 27 November 2011, 21:40

Fuel pressure reg, clogged return pipe, fuel pump. :undecided: all speculation but possible

Title: Re: Mk3 takes a bit of starting when hot
Post by: javalin on 28 November 2011, 12:28

coolant temperature sensor?

James

Title: Re: Mk3 takes a bit of starting when hot
Post by: Len on 28 November 2011, 13:01

Are we talking 8v or 16v here?

Title: Re: Mk3 takes a bit of starting when hot
Post by: Ninj on 28 November 2011, 13:13

8v sorry.

I imagine a blocked/restricted fuel line would manifest itself by rough running at all rpms, not just starting when it's warm?

Coolant temp sensor is an option I suppose but the quoted symptoms don't really match mine. Might be worth a swap to rule out though.

Cheers for the suggestions guys

Title: Re: Mk3 takes a bit of starting when hot
Post by: Len on 28 November 2011, 13:18

These kind of things are usually a fuel evaporation problem.

Title: Re: Mk3 takes a bit of starting when hot
Post by: javalin on 28 November 2011, 13:39

>These kind of things are usually a fuel evaporation problem.
I thought that was more of a carb problem rather than injection?  Where is it evaporating to?

Title: Re: Mk3 takes a bit of starting when hot
Post by: leegt5 on 28 November 2011, 19:23

Before my coil packed up it wouldn't start unless i let the car cool down and then it started.

Title: Re: Mk3 takes a bit of starting when hot
Post by: Wayne on 28 November 2011, 23:55

Have you checked the compressions  :smiley:

Title: Re: Mk3 takes a bit of starting when hot
Post by: Ninj on 29 November 2011, 21:10

Nope?

Title: Re: Mk3 takes a bit of starting when hot
Post by: Wayne on 29 November 2011, 21:15

Quote from: Ninj on 29 November 2011, 21:10

Nope?

Might be worth doing it tbh.

Title: Re: Mk3 takes a bit of starting when hot
Post by: Ninj on 29 November 2011, 21:46

Ok, 130k ish so never a wasted job but why do you reckon low compression would result in slower starting when hot?

Cheers

Title: Re: Mk3 takes a bit of starting when hot
Post by: Ninj on 29 November 2011, 21:55

Quote from: leegt5 on 28 November 2011, 19:23

Before my coil packed up it wouldn't start unless i let the car cool down and then it started.

Coil replaced about 3 months ago when it died, same symptoms then and now :/

Cheers

Title: Re: Mk3 takes a bit of starting when hot
Post by: Wayne on 29 November 2011, 23:37

Quote from: Ninj on 29 November 2011, 21:46

Ok, 130k ish so never a wasted job but why do you reckon low compression would result in slower starting when hot?

Cheers

Well it could be losing compression as it gets hot thus meaning harder to restart