In article
outautos.com>,
"pekerhed" > wrote:

> Yes, I was able to replicate the situation while parked with the engine
> running. It seems that when I take my foot off of the accelerator, the
> engine idles very low, and then back up to where it should be. When the
> idle goes very low, I can feel the car slightly vibrate, like it was
> thinking about stalling, but changed its' mind.

Yeah. It's starting to stall and the computer's trying hard to keep it
from doing that.

> I'll check my battery.

Check the charging system with a voltmeter. I'm almost certain you've
got a charging related problem , or a corroded connection. It should be
making decent voltage (13 volts - anyone got a better number here?) at
idle (1000 rpm or so). I dont' think it should 'pop up' when you rev
the car.

See if the voltage goes up at the battery whenyou rev the engine. If
so, suspect the alternator or the cables leading to it. I'd start by
cleaning all the connections - taking them apart and making sure they're
clean, oil free, and assembled good and tight.

Naturally, disconnect the battery when you do this

And, check the ground connections and ground straps between the motor
and body. They all come together on a stud on the motor, IIRC. Clean
it good, make sure it's dry, oilfree, and tight.

Ditto for the connections at the battery.

If it's still acting up, then suspect the alternator. When you replace
the alternator GET A NEW BATTERY. A bad battery can waste the
alternator, and vice versa.

Once you've got a stable charging system that's working right, the car
should idle properly. if it's not, then you need to totally clean the
throttle body. Actually, if yours looks dirty now, I'd do that before
replacing anything but the battery (but do check those connections!) I
like to remove it and remove the TPS and IAC and clean it totally, then
wipe the IAC off so it's clean and reassemble. It's really easy and
logical.