Hot starting issue
Hot starting issue
Author
Discussion

Adrenochrome

Original Poster:

1,860 posts

242 months

Sunday 22nd August 2010
quotequote all
Hoping someone can help me with a strange issue I'm having.

Car starts if left overnight etc no problem, but if I go for a run in it and stop for lunch etc when I come back to it it tries to turn over once and just dies.

Have tested the battery and alternator and everything is good there confused

FarmyardPants

4,372 posts

247 months

Sunday 22nd August 2010
quotequote all
My money's on the battery. Unless you have a proper battery tester it is not easy to verify the health of a car battery. FWIW mine currently has the same symptoms and I have just bought a new battery but not fitted it yet.

Adrenochrome

Original Poster:

1,860 posts

242 months

Sunday 22nd August 2010
quotequote all
Be interesting to hear how you get on when you change the battery.

My battery is less than a year old (Optima red top) I have also tried my spare battery and have the same results frown

Killer Rhubarb

388 posts

207 months

Sunday 22nd August 2010
quotequote all
Coolant temperature switch?

Adrenochrome

Original Poster:

1,860 posts

242 months

Sunday 22nd August 2010
quotequote all
Killer Rhubarb said:
Coolant temperature switch?
Where is this? My temperature is sitting higher than normal when in anything other than 5th gear scratchchin

Nickccc

1,682 posts

277 months

Sunday 22nd August 2010
quotequote all
If the coolant temp sender has gone AWOL, your fans will turn on as
soon as you start the car.more than likely your connectors to the fans are
bunged up. Mine had it last week, the plugs sit in the tray below the rad
they collect loads of gunk and water. Open the plugs clean them with contact
cleaner, maybe give them a scratch with a bit of sandpaper and see what happens.
I know it's A fuel problem but if the coing system isn't doing it's job you'll get
starting proems.

tvrgit

8,489 posts

281 months

Sunday 22nd August 2010
quotequote all
Adrenochrome said:
Killer Rhubarb said:
Coolant temperature switch?
Where is this? My temperature is sitting higher than normal when in anything other than 5th gear scratchchin
Tom the coolant temp switch is on the metal pipes in front of the engine. Take off the panel (that the washer bottle is under) and the switch stick upwards on the passenger side, 2 wires go into it. Try cleaning up the connectors - be very careful though because they can be corroded and brittle.

How is the car otherwise now?

FarmyardPants

4,372 posts

247 months

Sunday 22nd August 2010
quotequote all
Sounds like I better look at that switch as well then.

Nickccc

1,682 posts

277 months

Sunday 22nd August 2010
quotequote all
Are your fans on all the time? If not your temp sensor is fine.

gcpeters

1,002 posts

261 months

Monday 23rd August 2010
quotequote all
could be a dodgy starter or bad earth for the starter

mine would do exactly the same thing, new starter and it still did it!! checked the earths, re done them and she would spin over no matter how hot after

GP

Killer Rhubarb

388 posts

207 months

Monday 23rd August 2010
quotequote all
My temp switch was broken and the fans were NOT cutting in when they should. Which meant after I switched off the car stayed hot and would not start correctly until cooled.

Adrenochrome

Original Poster:

1,860 posts

242 months

Thursday 26th August 2010
quotequote all
Update. Checked the coolant temp sensor and earth straps and they were fine, I changed the battery and no more hot start problems (so far)

Andrew, have done my 1000 mile run in and not used a drop of oil, still got the tapping noise though and jerky acceleration, this may be down to the decats??

Adrenochrome

Original Poster:

1,860 posts

242 months

Monday 30th August 2010
quotequote all
Well that didn't last long hot start issue is back frown

Gray_101

1,118 posts

219 months

Tuesday 31st August 2010
quotequote all
Ive had this problem, and put it down to heat soak to the starter motor.

i removed the starter motor and took it apart, to find there is hardly any end float on the motor shaft , so once it gets hot and expands it gets very tight in the case preventing free operation.

i fitted a couple of washes inside the case to give the shaft some extra clearance and put it back together

Then i wrapped the starter in heat proof sliver matting and secured with aluminium tie raps and glue.

my starter motor is still a little slugish when hot but not as a bad as it was, and the car always starts now.

i surgest you try what i did or get another starter motor, before looking at other things

Edited by Gray_101 on Tuesday 31st August 00:36

FarmyardPants

4,372 posts

247 months

Tuesday 31st August 2010
quotequote all
Hmmm... mine just makes a click and a slight nnnngg! sound like it's straining and dash lights dim etc, but it doesn't turn over. This was in the hot weather, maybe the starter motor is on its last legs.

On the Spa trip the hot start sufferers should lead the way! (we always seem to leave a few behind each time we stop biglaugh )

FUBAR

17,065 posts

267 months

Tuesday 31st August 2010
quotequote all
Mine has developed a pinking/jerking under acceleration when its hot. Car is in for investigation. It seems to be related to hot engine bay temps. I appreciate it's not directly related to your main problem, but when they find the problem I'll let you know, in case your 'jerkiness' is related.

Adrenochrome

Original Poster:

1,860 posts

242 months

Tuesday 31st August 2010
quotequote all
Thanks for all the replies smile

My starter is brand new, but car is going back in to the garage on Thursday for a modified starter to see if this cures it.

morebeanz

3,283 posts

265 months

Tuesday 31st August 2010
quotequote all
FUBAR said:
Mine has developed a pinking/jerking under acceleration when its hot. Car is in for investigation. It seems to be related to hot engine bay temps. I appreciate it's not directly related to your main problem, but when they find the problem I'll let you know, in case your 'jerkiness' is related.
Is this at any particular rev range, Nick, or just broadly throughout? I have had similar symptoms when very hot...

high52kojak

505 posts

226 months

Tuesday 31st August 2010
quotequote all
Alternator?

FUBAR

17,065 posts

267 months

Tuesday 31st August 2010
quotequote all
morebeanz said:
FUBAR said:
Mine has developed a pinking/jerking under acceleration when its hot. Car is in for investigation. It seems to be related to hot engine bay temps. I appreciate it's not directly related to your main problem, but when they find the problem I'll let you know, in case your 'jerkiness' is related.
Is this at any particular rev range, Nick, or just broadly throughout? I have had similar symptoms when very hot...
When it first appeared it was at about 5.5k rpm, but it now seems to happen around 2k rpm. You can push through it but it pinks like a Brighton resident