RRC cold starting (3.5 V8)

D

Dom J

Guest

• Sep 29, 2004

• #1

My RRC has started to have problems starting when cold. Takes about 10-15
secs of turning over before she begins to fire. When hot starts ok, people
have been mentioning the ECU may be faulty, hope not as this is big bucks!!.

Dom J

 

R

Richard Savage

Guest

• Sep 29, 2004

• #2

Dom J wrote:

>My RRC has started to have problems starting when cold. Takes about 10-15
>secs of turning over before she begins to fire. When hot starts ok, people
>have been mentioning the ECU may be faulty, hope not as this is big bucks!!.
>
>Dom J
>
>
>
>
>
Hi Dom

Cold start injector perhaps?
Thermotime switch ditto?

Injector won't operate unless the thermotime switch is working, i.e
closed when cold. AFAIKR.

(Stands back to await expert knowledge)

ECU isn't terribly expensive if you go to the right places.


Rear springs changed ;-) And two tyres :-( which are already showing
uneven wear patterns 8-((
Are you going to the Autumn Conference?

Richard

 

A

Austin Shackles

Guest

• Sep 29, 2004

• #3

On or around Wed, 29 Sep 2004 17:48:30 +0100, "Dom J"
<[email protected]> enlightened us thusly:

>My RRC has started to have problems starting when cold. Takes about 10-15
>secs of turning over before she begins to fire. When hot starts ok, people
>have been mentioning the ECU may be faulty, hope not as this is big bucks!!.
>

what age, what fuel system...?

first suspect would be plugs or leads.

if it's a fuel problem on one of the injection systems, it's more likely to
be a sensor. could be a temperature sensor telling it it's warm, so not
getting cold start enrichment.

 

A

Alan Mudd

Guest

• Sep 29, 2004

• #4

Forget about the cold start injector, this makes no difference whatsoever
until temperatures reach -20.

I disconected mine before I sold the RR (sob sob...long story)....

Before you start worrying about ECU's check all the replaceable items first,
spark plugs, HT leads, connections to the coil...all the usual suspects.

If you haven't done plugs for a while, go on treat yourself know it's worth
while.

Coolant temp sensor is also responsible for lots of running problems,
although this tends to be hot starts rather than cold starts.

If none of the above produces any results, time to start looking at the
electronic goodies.

Good luck.

Muddy


"Dom J" <[email protected]> wrote in message
news:[email protected]...
> My RRC has started to have problems starting when cold. Takes about 10-15
> secs of turning over before she begins to fire. When hot starts ok,
> people
> have been mentioning the ECU may be faulty, hope not as this is big
> bucks!!.
>
> Dom J
>
>
>

 

R

Richard Savage

Guest

• Sep 29, 2004

• #5

Alan Mudd wrote:

>Forget about the cold start injector, this makes no difference whatsoever
>until temperatures reach -20.
>
>I disconected mine before I sold the RR (sob sob...long story)....
>
>Before you start worrying about ECU's check all the replaceable items first,
>spark plugs, HT leads, connections to the coil...all the usual suspects.
>
>If you haven't done plugs for a while, go on treat yourself know it's worth
>while.
>
>Coolant temp sensor is also responsible for lots of running problems,
>although this tends to be hot starts rather than cold starts.
>
>If none of the above produces any results, time to start looking at the
>electronic goodies.
>
>Good luck.
>
>Muddy
>
>
>
>
>
>


Dom,

I told you the experts would be along to rescue you presently!

Richard

 

D

Dom J

Guest

• Oct 1, 2004

• #6

> Dom,
>
> I told you the experts would be along to rescue you presently!
>
> Richard
>

Should have put a bit more detail in first post.
1989 D reg V8 Efi.
It's got the non hot wire injection system.
Plugs and leads new 2 months ago, all plugs gapped as per Haynes book.

I'll have a look for the coolent temp sensor tomorrow. I assume to change
this I need to drain the coolent system, which I need to do anyway to change
the rad. Can this sensor be tested at all??.

Dom J
PS Richard, see you at the AGM!.

 

N

Nige

Guest

• Oct 1, 2004

• #7

"Dom J" <[email protected]> wrote in message news:[email protected]...
>
>> Dom,
>>
>> I told you the experts would be along to rescue you presently!
>>
>> Richard
>>
>
> Should have put a bit more detail in first post.
> 1989 D reg V8 Efi.

Is that a typo matey? 89 isn't D reg

> It's got the non hot wire injection system.

Same as mine, the flapper system

> Plugs and leads new 2 months ago, all plugs gapped as per Haynes book.

I would use the proper manual, not haynes as they can be wrong, also check updated data etc.

>
> I'll have a look for the coolent temp sensor tomorrow. I assume to change
> this I need to drain the coolent system, which I need to do anyway to change
> the rad. Can this sensor be tested at all??.

If you need help, I have the proper RR repair manual here, all 4 inches thick of it~!

I would imagine the coolant temp probe will be on the block somewhere as measuring rad water will be
different due to several different reasons.

I am currently trying to get rid of a odd missing on mine & the previous owner & he's fit allsorts new
inc dizzy & coil, leads, huggins of other bits. If your sensor doe not sort it, if you live near
Bradford/Leeds you can test the various bits on yours to see if it helps?

Ta

Nige

 

D

Dom J

Guest

• Oct 1, 2004

• #8

"Nige" <nigel.inceNO****[email protected]> wrote in message
news:[email protected]...
>
> "Dom J" <[email protected]> wrote in message
news:[email protected]...
> >
> >> Dom,
> >>
> >> I told you the experts would be along to rescue you presently!
> >>
> >> Richard
> >>
> >
> > Should have put a bit more detail in first post.
> > 1989 D reg V8 Efi.
>
> Is that a typo matey? 89 isn't D reg
>
Whoops, should be 1986 D reg!!. I'm miles from Leeds Nige, all the way
down in Cheltenham!.

Dom J

 

N

Nige

Guest

• Oct 1, 2004

• #9

"Dom J" <[email protected]> wrote in message news:[email protected]...
>
> "Nige" <nigel.inceNO****[email protected]> wrote in message
> news:[email protected]...
>>
>> "Dom J" <[email protected]> wrote in message
> news:[email protected]...
>> >
>> >> Dom,
>> >>
>> >> I told you the experts would be along to rescue you presently!
>> >>
>> >> Richard
>> >>
>> >
>> > Should have put a bit more detail in first post.
>> > 1989 D reg V8 Efi.
>>
>> Is that a typo matey? 89 isn't D reg
>>
> Whoops, should be 1986 D reg!!. I'm miles from Leeds Nige, all the way
> down in Cheltenham!.
>
> Dom J
>
>
>

oh well! the offer was there!

Cheltenham eh? Had some good days/nights there at the festival & I don't even like the fecking things!
(horses that is!)

Nige