Car won't idle after warmup

[Cade Carvell]

Sorry,
  I forget that one....It is a 87 4KQ, 5Cyl, Non Turbo.

Sorry about that,


Cade Carvell
National Business Systems, Inc.
2919 West Service Road
Eagan, MN 55121
Office: 651-994-4400

>>> Bob <bob at audisport.com> 02/07/03 10:38AM >>>
what kind of car? Turbo? non turbo?
Bob

Cade Carvell wrote:

>*This message was transferred with a trial version of CommuniGate(tm)
Pro*
>Hi,
>  I have a semi-serious problem here.  For the last two weeks that
car
>once and a while after warmed up wouldn't idle well, it ideled really
>low (500-600rpm) by the gauge in the passenger compartment.  When I
>would try to take off it would sputter, then take off.  It wasn't all
>the time, etc.
>  Now, things have changed.  Starting yesterday, After the car is
>warmed up, 15 minutes or so of running, the car idles low (500-600)
but
>it is steady, most of the time, once an while it will bounce 300
rpm's
>for about 15 seconds.  When I go to hit the gas to bring the rpm's up
to
>a point when I can shift, etc, it won't accel well at all.  It takes
>several revving sessions to get a reliable increase in RPM's (Above
2000
>Rpm's).  Once I get the rpm to hit 1500, I will shift into gear no
>problems, the power band is strong through the next stop, or slow
down.
>After that, it starts again.
>
>  I did the ever so famous WD-40 hit on the vacuum lines about a week
>ago, no noticeable change in rpm anywhere that I sprayed.  I pulled
the
>oil fill cap off will running, the monitor took a dip (100 rpm) after
a
>few seconds, it picked right back up.  Same thing with the dipstick
>tube.  So I think that Vacuum is ok.
>  The car always seemed slower then it should be when compared to a
>friend of mines car, same year, everything, more miles though ;-).
>
>  I am getting my propane tanks filled so I can heat up the garage to
>work on it this weekend.  I went through the Bentley, really didn't
see
>anything that struck me.  There is no section on troubleshooting this
>type of issue.  Does anyone have any idea were I should start, or
what
>the more common things that cause this?
>
>Maintenance:
>  New plugs, wires, engine sensors by previous owner.
>
>Thanks a lot, I really need the help,
>
>
>Cade Carvell
>National Business Systems, Inc.
>2919 West Service Road
>Eagan, MN 55121
>Office: 651-994-4400
>
>
>
>
>