1998 Ford Taurus No Engine breaking

So what I get is that the RPM is high and will not slow down on its own
do you have check engine light on and if so have to check for codes 1st
I would suspect idle air control valve and also check for vacuum leaks
also
let me know

*****************************************
need manual CHECK IT @
http://www.2carpros.com/kpages/auto_repair_manuals.htm

The RPM does come down, it just kind of hangs there for a long time before it starts to come down. When I stop, the idle drops of to 800.

An example is when I speed up to say 50kmh to go down a flat street, I can let the gas off and it stay at that speed for at least a few blocks before starting to slow down. I haven't waited long enough to see if it will come right to a stop on its own. That will be another trial tomorrow.

The RPM drops to about 800 when the vehicle is stopped. When I start the car with my foot off of the gas pedal, it will rev up to about 2500 rpm. Then it will drop, but takes about 30 seconds to get to 800 rpm. When I shut it off and start it up again, it will sit around 1500 rpm and then slowly come down to 800 rpm, this takes about 30 seconds.

If I rev it up while in park, it will drop fairly quickly to less than 2000 rpm, but will take about 30 seconds to get back to 800.

I did look for vacuum leaks and couldn't find any. I will look again tomorrow. Are there any certain hoses that I should check real well?

The check engine light isn't on.

Thanks,

Rod

Lets try and clean idle air control valve
check PCV valve vacuum hose
let me know

I pulled the IAC valve. There was some black build up, so I flushed it out. One thing I noted was that the plunger was not seated even when I turned the key on. With the key on, I unplugged it and nothing happened. I then left it off and covered up the holes on the manifold. I then started the motor. The idle was about 500 rpm. When I reved it up the rpm quickly came back down.

I looked at the PCV hose and it looks good. I pulled the PCV out while it was running and put my finger over the end of the valve. There was a strong vacuum and I didn't hear any leaks.

Rod

The car is for my daughter and she came to pick it up last weekend, so I went ahead and replaced the IAC valve. It may have helped a bit on the engine braking when it is put into D from OD.

The one thing that was noticable is that when I pulled up to a stop sign or light, the rpm dropped to the 600 rpm range. I thought this was better.

Not sure if it was the fix, but it appears to have help some.

Thanks

Rod