996 starting problems

[brisel]

My boss is having starting problems on his MY99 996.

The engine starts ok when it is cold, but seems to have real trouble turning over when hot.

The battery is pretty new and a test of the alternator shows a voltage of 13.2 - 15.1 volts when idling & air con off etc.

Any ideas?

Thanks in advance

[johnfm]

What type of starting problems? If it doesn't crank at all, after a clunking sound, it could be starter motor. But you need to be a lot more specific. Mike at SPorts & classics is your man for online diagnosis!!

[brisel]

It turns over very slowly - too slow to fire. The alarm sounds due to the voltage drop.

No clunking & it's fine when the engine is cold.

I'm in Lincolnshire. Where abouts is Sports & Classics please?

Edited by brisel on Tuesday 17th April 20:35

[DucatiGary]

brisel said:

I'm in Lincolnshire.

www.911sport.co.uk

looks after all the local lads 911's

[nervous]

coil pack.

betcha im right.

[simes69]

nervous said:

coil pack.

betcha im right.

Yeah sounds it - so fairly cheap to fix...

[brisel]

Coil pack as in starter solenoid? Sorry, to me a coil pack is the chuffing unreliable thing that sits on the top of my VW R32's spark plugs

Cheers for the linky, Gary

[nervous]

if your getting a degradation of spark strength when the engines hot this suggests to me that its the coil pack or ht leads.

[DucatiGary]

coil packs are supposed to be replaced every 2-3 years so nerv might be your man, if your into that sort of thing.

[DucatiGary]

brisel said:

Cheers for the linky, Gary

no probs, tell them gary sent you and youll get some free stuff, tell tanya and phil i said that too

[BliarOut]

My money is on the starter motor....

[brisel]

The car runs ok hot or cold, it is just cranking the engine over hot that seems to be the problem.

Apologies if I've been a bit vague - the car isn't mine so my information is only second hand. Unfortunately the boss certainly won't let me test drive it...



Oh, and thanks for the tips, guys

Edited by brisel on Tuesday 17th April 21:24

[sportsandclassic]

Hi

im in knutsford cheshire by the way.

Just a long shot but if the alarm is going off because of a voltage drop and the car cannot start or turns over very slowly but ok when cold.....this is strange but what voltage is the alternator putting out ?

Is it boiling the battery and when everything cools its ok....Other thing is a high resistance through something...

Bit of a difficult 1 really.

Mike

sports and classic

[brisel]

Cheers Mike

Up to 15.1V but normally around 13.6V. He did say that it fluctuated a bit.

Knutsford isn't just "up the road" from here! Shame I can't borrow the car as my in-laws live in Mobberley...

[gfreeman]

brisel said:

It turns over very slowly - too slow to fire. The alarm sounds due to the voltage drop.

No clunking & it's fine when the engine is cold.

I'm in Lincolnshire. Where abouts is Sports & Classics please?

Edited by brisel on Tuesday 17th April 20:35

Sounds like knackered battery. Go to any tyre and battery merchant and get a free test on it.