Re: [doc] Spare Idle ECU

[Daniel Shane <daniel.shane@xxxxxxxxxxxxxx>]

Hi Nick,

Martin did check for correct vacuum routing, leaks, the throttle switch,
thermister at the ECU plug and all OK.  He unplugged the Idle-speed motor
and no difference.

That¹s why I asked if anybody had a spare ECU or if I could test mine in
another car.

Now I¹ve got no knowledge for the PRV engine so any and all tips are
welcome.  I¹ve fitted new plugs, I'm going to order a new Dizzy cap and arm
as well as new leads.

I¹ll check the Idle motor is not stuck and clean it with carb cleaner.

Is there anything better and the Delorean Manual you could recommend for the
Engine.  I¹ve heard of a Green Volvo guide that might be good.

Dan Shane
DOC 423
VIN 4754


On 13/9/04 8:33 pm, "Nick Tomlinson" <nickandkathryntomlinson@xxxxxxxxxxx>
wrote:

> Hi Dan.
>  
> Check basics first before condemning 'black boxes'.
> Air leaks on o-rings/ inlet manifold, dropped off vacuum hoses, vacuum hoses
> connected to wrong devices, throttle-switch, fuses in fusebox, wiring to ecu
> (including the voltage feedback diode to throttle switch), sensor value of
> thermister (at ecu plug), plugs plugged in, idle-speed motor not stuck open,
> the air con mode switch is OFF (another vacuum leak possibility) etc. etc.
>  
> A 'very' Rough guide, with ignition in position 2 you should be able to hear
> the idle speed control valve 'humm' at a certain pitch, with the throttle open
> (opening the throttle switch) the 'humm' should be slightly different.
>  
> Measure twice, fix once!
>  
> Good luck.
>  
> NickT.
> 
> Daniel Shane <daniel.shane@xxxxxxxxxxxxxx> wrote:
> Does anybody have a spare Idle ECU I could borrow to test that mine is
> indeed faulty. My car now idles at 3500 RPM and can be a pig to start.
> 
> I'm in Lenham in Kent I don't mind coming to collect it or if anybody
> fancies a nice county drive I'll buy you a pint in my local.
> 
> Or is there a way bypass the ECU. I've tried unplugging the ECU and
> starting the car and it does the same, shooting upto 3500 RPM.
> 
> Dan Shane
> DOC 423
> VIN 4754
> 
> 
> 
> 
> 
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