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?
Saturday, August 11th, 2007 AT 12:06 PM