OK, I have been having the high idle problem for months now, replacing
nearly everything related to the TBI system. Thanx to everyone for their
input, BTW!

Yesterday the idler pulley crapped out while I was hooking up my trailer
and it overheated(temp gauge was pegged well over the 260 on the gauge).
Nothing I could do to cool it off so I just shut it off. After a couple
errands in our other vehicle, I went and got a new idler($17.40 or so),
removed the old(plastic) and installed the new(stamped steel), the belt was
good so I reused it(though routing was interesting with no diagram(third
time was a charm)). Only lost about a quart and a half of coolant.

Started it up(same as before, needed the throttle cracked), let it run a
bit, then drove it home...


NOW, THIS is where it gets interesting... Pulled up in front of my house and
something was different...it was idling at 700RPM! Switched it to an AC
setting and it went to about 850-900RPM! Went out this morning to start some
running and it started first try with no throttle, went to 1000RPM then
1100RPM, then down to 700RPM after it warmed up! Started and shut off 4-5
times with no starting or idle problems(went to 8-900 and dropped right down
to 700)!


WHAT THE F%&#????


Any ideas on this new tidbit, anyone? Everyone?

Shades wrote:
connection to move ever so slightly & make better contact. Maybe your
touching something while replacing your pulley & belt caused a bad
connection to become better.

Good point! After some further errands this afternoon, it started acting up
again(high idle), but not constantly.

Really getting puzzled now...I guess I needed more confusion in my
life...

*sic*


"Stephen Young" <sjyoung1 (AT) nospam (DOT) net> wrote

On Wed, 25 Jan 2006 12:44:37 -0600, "Shades" <shades_1970(at)netins(dot)net>
wrote:

Maybe the added pressure and heat scared the shit out of it and it behaved for a
bit? *g*

Not having a clue about the cumputer/fuel stuff, I'll take a WAG and say that
maybe sensing the overheating condition temporally kicked the TBI to change the
mixture??

Mac
https://home.comcast.net/~mac.davis/wood_stuff.htm

Greetings,

I agree with the possibility that it may be a bad connection(s) that was
somehow aided by either the high temps or the work you did. I would suggest
checking the connections to the Intake Air Temp sensor and Coolant Temp
Sensor (as well as the sensors themselves). A fault in either one could
lead the ECM to believe that the motor is much colder than it actually was
which could cause it to run at a higher idle.

Cheers - Jonathan

"Shades" <shades_1970(at)netins(dot)net> wrote

There is no Air Intake Temp Sensor.

CTS is new with new plug, as originally stated.


"Jonathan" <Fire_Capt651 (AT) hotmail (DOT) com> wrote

"Shades" <shades_1970(at)netins(dot)net> wrote


Snip.


I assume that you changed all the tbi gaskets, including the alum. ring spacer between the top of the tbi, and the
bottom of the air cleaner?

Forgive me if this has already been brought up.


HDS

On Wed, 25 Jan 2006 12:44:37 -0600, "Shades"
<shades_1970(at)netins(dot)net> wrote:


Idle Air Control Valve ?

Mentioned and already cone.


"Elbert" <ask (AT) me (DOT) com> wrote

Gaskets done.


"HDS" <None (AT) None (DOT) com> wrote