Date   : Sun, 21 Nov 2010 09:11:54 -0600
From   : jules.richardson99@... (Jules Richardson)
Subject: [OT] Who'da thought...

Darren Grant wrote:
> On 21 Nov 2010, at 01:55, Rick Murray wrote:
> 
>> If you have a choke, you don't have an ECU.
>> 
>> If you don't have a choke, you DO have an ECU.
>> 
> 
> Not entirely the case, for many years before electronic systems became
> common there would be an automatic choke, this was a mechanical method of
> controlling the mixture. It was when cars replaced carburettors with
> injectors that ECU's became standard. Pretty much all cars in the 90's had
> injectors to meet emission standards. 

Yes, I think it's nearly* safe to assume that if  it does have a choke lever 
then it doesn't have an ECU, but that lack of one doesn't always tell the 
whole story.

* I say nearly because I think that some very early systems tapped into the 
existing carb body and controlled the throttle plate and the spark via the 
ECU. It's not impossible (although very unlikely) that they retained a manual 
choke.

cheers

Jules