K-Jet idle

• Subject: K-Jet idle
• From: tedcrum@domain.elided (Ted Crum)
• Date: Mon, 28 Nov 1994 11:11:26 -0800 (PST)

I've never worked on the 323, but the f.i. may be similar to my Jetta. On 
the VW, there is an auxiliary air valve, controlled by a tachometer 
circuit, which opens to increase the idle if it drops too low. It opens 
at 750 RPM and closes at 1100 RPM. 

If the normal idle is set too low, the valve opens and boosts the idle. 
If the boosted idle is below 1100, it stays that way. But if the idle 
drifts up a little, the valve closes and the idle drops. If the slow idle 
is above 750, it stays that way, but if it drifts higher....

To adjust the Jetta, one starts with a high idle, then brings it down, so 
that the valve never opens.

- -TC

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