No Subject

[paul.heneghan@bbc.co.uk (Paul Heneghan)]

From: Mike Walder <miwa@premier.co.uk>

>I . . .  decided to check out my dwell angle.

>Thing is, the Haynes manual suggests an angle of between 43=BA and 65=BA. =
> At
>1000rpm, the meter measures about 16, at 2000rpm about 30, and at 3000 or
>more about 45.

Presumably we're talking about the dwell angle of the ISV.  The amount of 
air through this along with the amount of air passed through the throttle 
and the throttle bypass determines the engine speed.

If the throttle closed position is incorrect, or if the throttle bypass 
regulating screw (large brass screw in throtle body - prone to gradually 
unscrewing itself due to rubber o-ring perishing) is not adjusted correctly, 
the ISV has to correct for it - this causes the dwell angle to differ from 
that recommended.

Try adjusting the throttle bypass regulating screw (often shown in Haynes 
manual pictures and marked as do not adjust).  This will alter the ISV dwell 
angle.  The throttle closed position usually does not need adjusting unless 
you have dismantled the throttle assembly in the past.

The ISV controller acts on information from the following - engine speed 
(from primary side of coil), engine temp (increases idle when engine very 
cold), throttle closed switch (no ISV action unless foot off throttle).

>At what speed should the dwell angle be between the 43 and 65?  I assumed
>that this should be at idle.

Yes

>My engine type is WC, with K-jetronic.

As is my parts Avant.

>Could this be contributing to my warm idling problems?  Engine is running
>fine otherwise.

Could be.

>With regard to the meter, I'd recommend it to anybody.  At only =A326 it=
>seems excellent value. It measures 3,4,_5_,6 and 8 cyl. The quality feel of 
the
>unit is equal to that of my =A368 electronics multimeter, and even comes=
> with a nice padded case.

I think I'll buy one - after such unequivocal recommendations from you and 
Phil, I can't go wrong - preumably Halfords will have it?

>P.S.  Anybody know of any independent Mitsubishi Owner Clubs, US or UK?

Other car clubs are hard to find - I tried to find a Vauxhall/Opel one with 
no success.

Paul
paul.heneghan@bbc.co.uk
1984 Audi 80 quattro
1989 Audi 100 Avant