86 4kq, idle problem (long)

[SJ]

Classic signs of a sticking idle control valve. It needs a cleaning. Colder
weather tends to make the valve stick. Congealed oily deposits.
Take out valve, clean it with carb cleaner or similar.
Test with 9 volt battery. You will see valve move and slightly uncover an
air gap.
I spray in cleaner. Put fingers over the in/out holes. Shake it around. Use
battery to work the valve. Shake some more. Battery, etc etc, etc . . .maybe
5 repetitions with clean fluid.
That should solve your problem.

SJ
85 Dodge PU, D-250, 318, auto
85 Audi 4k - - sold but still on the road
88 Audi 5kq
90 Audi 100q


> From: Shaggs1996 at aol.com
> Subject: 86 4kq, idle problem (long)
>
> Problem started a few days ago.  Im gonna explain this the best I can, so
> bear with me.  Went to go run errands, started car, car ran rough, 200rpm,
didnt
> stall, but when given a decent amout of gas, car sounded like it was
> backfiring (loud "boom" from engine bay).  After feathering the gas a bit,
the idle
> evened out to 1000rpm, and I was on my way.  Same thing happened twice
later that
> day after coming out of a store and getting gas.  Later the same day,
after
> the car sat for a while, I started it up and everything was merry, drove
off,
> car ran great.  Get to friends house, shut down, come back 2 hours later,
car
> stars awesome, and drives off great.  A few mins into the trip, car loses
> power, and wants to idle at 200rpm again.  Im forced to pull over, and
rescure the
> idle via my foot, again.  If I try and move the car when the idle is that
low,
> the car of course doesnt wanna go, and lunges forward as the revs drop.
Car
> gets going, and gets home fine.  I had time to look at it tonight, so
after a
> stuck ebrake, I pull the car into the garage.  Check some O2 sensor
wiring,
> pull the plugs, and check for vac leaks..nothing, everything there checks
out.
> Fuel filters are a month old, fuel pump wiring is nice and dry, but there
is
> alot of ice under the car, and around the fuel lines.  I did pour in some
fuel
> injector cleaner tonight as well.
> Thats where I stand now.  Car does run right when it wants to, and this
> problem is sporatic!   Any ideas where to start here?  Ive asked around
alot, but
> havnt consulted my Audi tech friend yet...help!
>
> Mike
> 85 4k
> 86 4kq
>
>