Re: Uneven idle

I took off the EGR tonight it was pretty clean but I cleaned it up it
appears to working correctly. After reinstalling it the engine was
cold so I started it up all ran very smooth but after a few minutes
after it reach temp it was like a switch was trown the RPM droped down
to and then strated fluxuating up and down between 700 and 1000 Rpm's.
The vacuum hoses appear to be in pretty good shape I replaced one the
other night that broke off by accident. Also there are no stored codes
and I tried last month swapping the ECM but it ran the same. 

I was having a problem last year it was stalling at stop signs and you
could hear additional rumbling in the exhust when down ****fting so I
swaped out the IAC which corrected the stalling and reduced the noise
but maybe it need a new IAC. I did clean out the IAC ****t of the
carbon and set the IAC plunger height before installing it.
Hank

>check a few things, 1 vacuum leak...go buy a boat load of bulk hose and 
>replace what looks old or cracked (real cheap fix sometimes) 2) EGR is 
>filled with crud clean all the carbon out that might make it not work
right 
>or get a new EGR and still clean out the crud
>
>"Hank" <hank@[EMAIL PROTECTED]
> wrote in message 
>news:1dc7331det8dtrajhdrolfag6gqed326c1@[EMAIL PROTECTED]
>>I got a 85 GT last summer 63K miles it has never really ran that good
>> in my opinion where as the idle runs from 700 to 1000 up and down. It
>> can also be felt while driving the uneveness at a steady speed of say
>> 35 or 40 mph. While checking the timing it also is not steady at all
>> bouncing from 10 to 7 deg TDC. Is this normal or what should I be
>> looking for. I tried changing the 02 sensor, TPS, MAP I have a donor
>> car to swap parts from. I replaced the wires cap rotor and plugs.
>>
>> I have an 85 SE as well 2.5 runs great I know all about the 4 cyl
>> keeping it running good but not as familar with the 6 cyl in the GT.
>>
>> Thanks
>> Hank 
>