Re: 4kq rough cold idle

[Todd Phenneger <phen9461@uidaho.edu>]

On Mon, 8 Sep 1997, Fluhr wrote:
> Is this "backfire" continous when you are decelerating off-throttle, or
> just once?

	Yes, Like when I am coming off of a Freeway and coasting downhill
in 4th gear then it backfires the whole way down.  IF I open the throttle
just a little it goes away and purrs.

> If it is continuous, then I'll bet your idle switch is mis-adjusted or
> broken.  If it is not working correctly, the CIS-E fuel injection system
> continues to provide fuel to the engine, thus making a noise which sounds
> like backfiring (or really cool burbling, IMO).  If the idle switch is
> working, then the CIS-E control unit will cut fuel flow when the rpms
> are significantly above idle. 

	THanks, I will have to check this.  Where is the Idle switch.  I
know where the Idle stabalizer is but that is different isn't it.  Is the
switch off to the side of the the fuel distributor on the CIS-E unit or
what.  I see quite a few connection coming off of there.

> If your idle switch isn't working, then you cannot be sure that your
> idle mixture is correct.

	Again, thanks.  I will check this soon.

        Todd Phenneger   aka: Zarati
        1984 4000s quattro / New Red Paint
        2.5" Borla SS Exhaust  /  Boge Turbo Gas Shocks
        15" Wheels & 205/50 ZR15 Bridgestone RE-71s
        Considering a Turbo Conversion  :)