Re: Uneven idle

The converter looks like it in good shape I had the whole system off
last month to replace the clutch. The guy that does the inspections
last year when it was on the lift said it did not look stock to him
from what I saw it is welded on both sides to the pipes. As to its age
no idea I got it last summer 63K miles and have put 2K addition on it
since. Like I said yesterday during warm up the idle is fine it when
it hits full warm up then it idles up and down about a 300 rpm range.
Thanks
Hank



>Hank the only other thing that comes to mind is the Catalytic converter 
>plugging up partially.
>
>sounds to me like you have done the logical (inexpensive) stuff that I
would 
>do.
>how old is the converter?
>
>"Hank" <hank@[EMAIL PROTECTED]
> wrote in message 
>news:hnvc33t49lg2l92kirn73nqiqld32r92if@[EMAIL PROTECTED]
>>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
>>> 
>