Meta Immoboliser hot start problem
Meta Immoboliser hot start problem
Author
Discussion

colinrob

Original Poster:

1,199 posts

280 months

Friday 4th February 2005
quotequote all
Can anyone please help? when car is hot it won't start, starter motor is OK, I have also fitted a modwise kit, been told it is probably the immoboliser relay overheating, any ideas where it is and how I can change it? please e-mail me details through my profile
Thanks Colin

Ribol

11,993 posts

287 months

Friday 4th February 2005
quotequote all
colinrob said:
Can anyone please help? when car is hot it won't start, starter motor is OK, I have also fitted a modwise kit, been told it is probably the immoboliser relay overheating, any ideas where it is and how I can change it? please e-mail me details through my profile
Thanks Colin

It wouldn't be an immobiliser relay overheating, they only work when you are trying to crank and therefore would not be on long enough to overheat.

Are you saying it does not crank or does not fire?

If the latter have you tried another coil?

colinrob

Original Poster:

1,199 posts

280 months

Saturday 5th February 2005
quotequote all
It starts fine when it is cold and imediatly after I have been for a run but leave it five mins and it the starter is completely dead

dlewis

315 posts

298 months

Saturday 5th February 2005
quotequote all
Colin

Is this a continuation of your last thread?

My guess is that your solenoid needs overhauling /replacing and that the starter motor part is fine.

Whilst a mod kit will provide more volts to it (more electromotive force!) in your case it still may not overcome the friction generated through thermal expansion.

Dave


Ribol

11,993 posts

287 months

Saturday 5th February 2005
quotequote all
colinrob said:
It starts fine when it is cold and imediatly after I have been for a run but leave it five mins and it the starter is completely dead

Sounds like the well documented heat soak starter problem.

colinrob

Original Poster:

1,199 posts

280 months

Saturday 5th February 2005
quotequote all
No I have fitted a new starter but it still won't start when hot

dlewis

315 posts

298 months

Saturday 5th February 2005
quotequote all
Colin

Does the pump prime?

Does your new motor (and old) start from cold?

What is the temp on the gauge when it does not start?

Dave

colinrob

Original Poster:

1,199 posts

280 months

Saturday 5th February 2005
quotequote all
dlewis said:
Colin

Does the pump prime?

Does your new motor (and old) start from cold?

What is the temp on the gauge when it does not start?

Dave


1) Yes

2) Yes

I dont know the Temp when it does not start, but after driving home on Thursday Night about 20 miles parked car in the drive it would not start after leaving for 3/4 hour did later but probably after 2-3hours, took it to Ewelme coachworks yesterday turned it off when I got there tried starting it 2 mins later and it started tried after 10 mins no go

dlewis

315 posts

298 months

Saturday 5th February 2005
quotequote all
So the new motor is not an improvement on the old then!

When it does not turn,
do the headlights dim after being on for a while?(checking battery)
does the ignition light dim when turning the key?(checking power to starter)

Have you fitted a new mod kit?

Failing this you will need to do some circuit readings.

Dave

simon.b

1,230 posts

311 months

Monday 7th February 2005
quotequote all
Colin YHM,

The relays are built into the immobiliser unit and cannot be replaced, it’s a tamper proof unit and the whole thing will need replacing and synchronising to your system. However if you’ve got a hot start problem then all may not be lost.

The immobiliser is susceptible to heat soak from the engine, it is this that kills the relays. If you move the immobiliser, which is usually sat on top of the bellhousing cover behind the dashboard, to somewhere else and protect it from conducted and radiated heat it should be OK.

This has work for me.

Cheers,

Simon.

colinrob

Original Poster:

1,199 posts

280 months

Monday 7th February 2005
quotequote all
Thanks for the help, I will try moving the immoboliser unit after I get back off hols
Thanks again
Colin