Re: 90 tbird cruise control weak..
"Backyard Mechanic" <email@example.com> wrote in message
> "Dark1" <firstname.lastname@example.org> wrote in
>> had the problem since I got the car, some 35,000 miles ago..
>> the cruise control works, but when confronted with even a mild uphill
>> grade, I get to watch the (digital) speedo gradually drop..
>> if the hill is big enough, it will get to 10mph under the set point
>> and give up and shut down..
>> I need to tear the dash apart to replace the heater core anyway, so
>> while I'm at it, just exactly where should I be looking?
> not under the dash.. unless there's a vacuum leak under there. Esp the
> dump valve at the brake pedal assy
> Get a vac gauge and pump, hook it to servo vac port and see if it will
> somewhat of a vacuum.
> Call a scrapper and get the price of a used servo ... there should be
> plenty of them
> There's a time to "throw parts" at a problem and I would inspect all the
> lines for kinks and leaks, and if I found none, i'd just replace it.
well every vac line not going into the firewall has been recently replaced,
and I have a cable from the throttle and a vac line(which looks fine for the
whole 3 inches I can see)disappearing into the backside of the fender well,
so I'm assuming the servo is under the dash?