4kq idle/warmup problem

[Huw Powell]

> StaticNiche_Quattro wrote:
> 
> I have a '85 4kq.  It starts up really quick every time, but as soon
> as it is started i have to keep my foot on the gas to keep the RPMs to
> about 2000 for 30 seconds or so.  If i let my foot off the gas then
> the engine will come very close to stalling.  However, during the
> first 30 seconds, if i dont hold down the gas, the engine will idle at
> what the tach says is 1000 RPMs, but what is seems to actually be more
> like 300 RPMs or less... just barely not stalling.

weird.  the tach is driven directly by the coil/ignition system... and
this info also goes to the ecu to tell it where to hold the idle.  i
think your engine *is* idling at 1k, it's just missing a lot.  check
spark plugs, wires, cap, rotor?

> 
> This only happens after a cold start and it only lasts for 30 seconds
> or so.  The thing that i think is strange is that the tach will say
> the engine is at 1000 RPMs, when it obviously is much less than that.
> 
> Does anyone have any ideas what the problem may be?
> 
> Thanks,
> -Dan R.
> 
> '85 4kq

-- 
Huw Powell

http://www.humanspeakers.com/audi/

http://www.humanthoughts.org/