Re: surging at cold idle

[Kneale Brownson <knotnook@traverse.com>]

Sounds like the behavior of my wife's 4kcsq I just "fixed" by sealing and
taping up a big hole in the underside of one of those weird multi-orifice
vacuum hoses, you know, the ones that usually cost $50-60.  It'd gotten bad
enough to whistle, and that's how I found it.  New $36 hose on order from
our friend Rod.

Kneale Brownson


At 06:27 PM 6/29/99 -0400, Huw Powell wrote:
>the CIS-E is running fine but there is a surge at cold idle I would like
>to get sorted out.
>
>When starting, cold, for a moment the engine will hover at about 1k
>rpm.  Then it drops to around 700, and just as if I was tapping the gas
>pedal to prevent stalling, it will kick up to about 2k for a moment,
>gradually fall back to 1 k, stumble again, and repeat the cycle, with a
>lower and lower upkick, this continues for a minute or two.
>
>Any btdt's who remember what part was the culprit, what the fix was,
>etc.?
>
>Thnaks!
>
>(The actuator current cycles around 10 mA at warm idle, ISV duty cycle
>set to about 28 %, but this is with no hoses pulled and plugged.  Timing
>at about 20 deg BTDC.)
>
>
>
>-- 
>Huw Powell
>
>http://www.humanspeakers.com
>
>82 Audi Coupe; 84 4kq; 85 Coupe GT
>http://www.nh.ultranet.com/~human