Ford Taurus Wagon 1992, 69K Mi, 3.0L Throttle assembly?

ISOTOPEC14

MEMBER
1992 FORD TAURUS

I have a 1992 Taurus Wagon with 69K miles. During low speed acceleration (from 0 to roughly 15mph) it feels like the right passenger side tire is hitting a pothole one time. The entire frame seems to be lifting on the right passenger side by about 2-4 inches. It does this if you stop and accelerate back up to 15 again, one time. The tires are new (1 month old) and have had no recent other problems. At higher speeds there seem to be no problems when accelerating (even-almost-floored). I checked the transmission fluid today and it appeared pink and free of debris (and at the proper level). The oil *could* use another quart and it isn't real black at all, still a bit brown. I've had one problem that I doubt is related to the acceleration bump which is that the Brake assembly is fairly rusty and causes some rust between the front disks and that makes some squealing even though the pads are pretty new. Only other maintenance I can think of is that 8 months ago I changed the plugs to solve a mileage problem. It is now getting roughly 25mpg overall.

Thanks so much in advance for your responses!

1 Reply

ISOTOPEC14

MEMBER
2 POSTS

After hitting one of these "bumps" that I describe above, a new related problem occurred. The engine, after starting, sounds normal for about three seconds and then moves rapidly higher in RPM and now the brakes don't work terribly well hydraulic. Seems fine in reverse, but in drive it sounds like it is accelerating all on its own. The car I think requires a motor or transmission mount replacement and I do not know offhand how to fix that. Do these symptoms sound right for this problem? Which mount could it be? Ok thanks much in advance!

Addendum. I bought a "Motor Mount" and found that the bolt that kept the old motor mount on was gone. I put a standard bolt in it. I started the engine again and it begins revving up to maximum within 5-10 seconds and there is some light "sputtering" as it tops off. I turn the car off fairly rapidly after this since I don't want to trash the engine.

I was able to physically prevent the throttle assembly from opening to maximum. I was able to hold the car at a reasonable sounding RPM idle rate. When I take my hand off it goes right back to completely open (maximum throttle). Is it possible that I have a bad throttle assembly or a bad Idle air bypass valve? Would the mass airflow sensor trigger this kind of problem? Would the Throttle Position sensor have anything to do with this also?