Vacuum leak is likely, but it could be a LOT more places.
I had a problem with my old 90 taurus where the air would shift
what vent it was coming out of at idle when i hit the gas.
It turned out to be a leaking vacuum motor in the HVAC system.
It helps to have a OEM Ford EVTSM manual that shows the hose layouts and what
connects to what. And a handheld vacuum pump.
Look under the dash on the passenger side, and make sure the linkage is
still hooked up, I know on some of the fords, they use a cheap plastic clip
to hold it in place and it can fall off.
Maybe maybe not your fix, but I tried!
Steve (& also, Don & Bob),
Thanks to all three of you for your helpful advice.
I looked under the hood after reading Don's note. I went and looked under
the hood. I noticed a gap in the air-flow path, between the fan and the
duct the fan feeds into. There was a pile of curmbly looking rubber or
spongelike stuff below.
Not wanting to get into this, I took it on down to my local Ford dealership
They diagnosed and made the needed repairs. They told me a mouse, or rat,
or some other creature had eaten through the gasket, or lining, or patch
connecting the fan motor to the duct above, and had entered the cavity and
had chewed into the vacuum hose that some of you have mentioned. They fixed
both breaches, and now all is well.
Thanks and best regards!
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.