TechnoLoGs
Thread starter
Originally Posted By: OVERKILL
Originally Posted By: TechnoLoGs
Originally Posted By: demarpaint
My Aerostar had the exact same symptoms twice, both times I changed the thermostat and the problem was resolved. I found the thermostat would last between 4 or 5 years in that vehicle, and I learned to only use Motorcraft thermostats in it. I did not have an electric fan, mine was belt driven. YMMV
Sounds like another T0stat change is in order.
I am now alarmed, because this also was changed by the guy, and they had to re-do the VSS, and it works now.. Less jerky, but still suspect...
I wonder if he put it in backwards, it IS a fail-safe.
And just two weeks ago, the temp was in the normal range, and I asked why it fluxuates WITHIN the normal range. This is weird.
If the speedo is "bouncing", that's not the VSS and is the speedo cable "catching" in its lining. So you either need to replace the speedo cable, or fab up a way to lubricate it so that it smooths out. My '87 Mustang had this problem, I just replaced the cable. Problem solved.
Makes sense! That speedo cable has been put through Hades.
I also suspect stray voltage of some kind.. Almost like the car sometimes hesitates and labors, then runs fine. The alternator was putting out 14V even a few weeks ago.
Could it be time to replace the alternator? Especially if it contains my voltage regulators, and rectifiers?
This alt looks pretty original, and we took the original VSS off yesterday.. Starting to think maybe things are failing gradually..
(This just guesstimation, checking in with the experts. I know some of my theories draw gunfire.)
Originally Posted By: TechnoLoGs
Originally Posted By: demarpaint
My Aerostar had the exact same symptoms twice, both times I changed the thermostat and the problem was resolved. I found the thermostat would last between 4 or 5 years in that vehicle, and I learned to only use Motorcraft thermostats in it. I did not have an electric fan, mine was belt driven. YMMV
Sounds like another T0stat change is in order.
I am now alarmed, because this also was changed by the guy, and they had to re-do the VSS, and it works now.. Less jerky, but still suspect...
I wonder if he put it in backwards, it IS a fail-safe.
And just two weeks ago, the temp was in the normal range, and I asked why it fluxuates WITHIN the normal range. This is weird.
If the speedo is "bouncing", that's not the VSS and is the speedo cable "catching" in its lining. So you either need to replace the speedo cable, or fab up a way to lubricate it so that it smooths out. My '87 Mustang had this problem, I just replaced the cable. Problem solved.
Makes sense! That speedo cable has been put through Hades.
I also suspect stray voltage of some kind.. Almost like the car sometimes hesitates and labors, then runs fine. The alternator was putting out 14V even a few weeks ago.
Could it be time to replace the alternator? Especially if it contains my voltage regulators, and rectifiers?
This alt looks pretty original, and we took the original VSS off yesterday.. Starting to think maybe things are failing gradually..
(This just guesstimation, checking in with the experts. I know some of my theories draw gunfire.)