Re: 85 2m4 engine problem

On Wed, 18 Jul 2007 07:51:32 -0700, "Les Benn" <lesbenn@[EMAIL PROTECTED]
>
wrote:

>
>"Hank" <hank@[EMAIL PROTECTED]
> wrote in message 
>news:n3pq93hv7hq2gedg14iqjbl0nus39m48j8@[EMAIL PROTECTED]
>> On Tue, 17 Jul 2007 09:03:24 -0700, "Les Benn" <lesbenn@[EMAIL PROTECTED]
>
>> wrote:
>>
>>>
>>>"Hank" <hank@[EMAIL PROTECTED]
> wrote in message
>>>news:m73o93p8jb7nc7nnq2ujifclflhqb59idd@[EMAIL PROTECTED]
>>>> 85 2m4 180K miles runs good cold after it warms up it looses power on
>>>> low rpms. The car when i say it looses power it like stumbles or
bucks
>>>> mainly noticable uhen the rpm's are low like running on the highway
>>>> climbing a hill at 60 65 mph it will buck if I down ****ft to 4th
>>>> getting rpms up it will climb the hill easier Also when I am first
>>>> getting onto the highway it will start to buck if I try to accelerate
>>>> to quickly.
>>>>
>>>> I replaced the O2 sensor as it had a code and I replaced the plugs,
>>>> cap & rotor and one plug wire as it was 18K ohms the rest are around
>>>> 2K. swaped the MAP sensor and replaced the TPS as well.
>>>> I replaced some of the more older looking airline tubes as well.
>>>> There are no codes at this point.
>>>> Any help would be great as its driving me crazy.
>>>> Hank
>>>Hank have you changed the fuel filter?
>>>
>> Yes fuel filter replaced and checked EGR as well ran it tonight it
>> runs good when cold but as soon as it get near operating temperature
>> it runs crapy again ??
>> Thanks
>> Hank
>Is it just at operating temp or when you are driving down the road and it

>reaches operating temp? What about a vacuum leak? Have you done any
checks 
>to see if you have cracked vacuum lines? 
>
Yes runs fine at cold which only lasts a few minutes.
At operating temp it runs crappy.
I replaced a couple of vacuum lines that did not look good.
I do not have a vacuum gage its missing I will pick one up but never
really used it so not sure what to look for.
Hank