More About Points »
I think the ABS system is just doing it's job. Each wheel is monitored for lock up when braking and when the system sees a change in one wheel speed relative to another wheel it will dump fluid rapidly (this is the pulsing your feeling) to keep the vehicle from sliding or spinning around. Most systems are sensitive to correct tire size, air pressure and treadwear. Read up on your brake system in the operator's manual for more explanation. Good luck.
Try turning the key to the ACC position. On some vehicles this will allow shifting out of Park without having to depress the brake pedal. If that doesn't work, you may just have to replace the battery. That might be safer then jump starting as a voltage spike can damage sensitive electronics.
PCM is located in the driver's front of engine bay sorta behind the headlamp module. It is contained in it's own plastic compartment. Make sure you have good positive and ground connections at the battery. The Positive cable especially can cause a problem where it is a dual connection. There was a bulletin to add a washer between the two cables and the lead ring terminal. If that checks out good, you may a PassKey issue.
Assuming the toe-in is properly set after 4 alignments, its sounds as though your Prelude has excessive negative camber (lean of the wheel in at the top). This angle is fixed and not adjustable with factory suspension. You will need to seek out a proactive alignment shop (most shops have the "set the toe and let her go" philosophy) that will check for correct ride height first. If that is out of spec a new set of springs would be needed and the camber angles rechecked to determine if that fully corrected the problem. If camber still requires correction, an aftermarket camber kit should be installed to allow for additional adjustment. Good Luck!