1994 Nissan Pathfinder Factory Alarm/Entry

I recently had several problems which entailed a new, used engine. Because nothing goes as planned my car sat for 3 months w/out engine. Engine was finally replaced. Now I am noticing:

My keyless entry does not work AND the light on the switch in center console blinks about 3 times every 2 seconds. It does not make a difference if I switch it to "off/on/impact on."
-Is it possible the mech just got a wire crossed or possibly grounded one out?

My car used to start after about 2 seconds, every time, BAM. Now it turns over, wanh, wanh, wanh, wanh, wanh, wanh, wanh, wanh.
-Is it possible my battery just got weak from sitting? I am in S. Louisiana and it does not get that cold here.

My brakes feel spongy. Could this be because the car sat up for so long?
-Should I just bleed them? I have had the ABS light on for 4 years. I heard I should replace ALL the brake fluid with FORD DOT 3 and the light may go off.

My radio loses its memory after about 8 hours, maybe the in dash clock too, did not notice though.
-Possibly a bad RE-connection? Or is it possible the starting prob has something in common with it.

I had the work done so I could sell the car. It is worth far less with these problems and I think I would have junked it if they do not get resolved. I paid 800 for the engine w/45k on it and 1600 for install. I was hoping to get 3500 for auto. The car is in GOOD condition, but body/elec have 216k on them.

Thanks for reading, it was a bit longer than I anticipated.
ANY HELP would be GREATLY appreciated.

Patrick

My keyless entry does not work AND the light on the switch in center console blinks about 3 times every 2 seconds. It does not make a difference if I switch it to "off/on/impact on."
-Is it possible the mech just got a wire crossed or possibly grounded one out?

If the ECU was replaced the keyless entry may now be the wrong code. A dealership can recode keyless remotes. I assume the switch you refer to references a alarm switch, since the remote is not working the alarm may or may not be turning off or on.

My car used to start after about 2 seconds, every time, BAM. Now it turns over, wanh, wanh, wanh, wanh, wanh, wanh, wanh, wanh.
-Is it possible my battery just got weak from sitting? I am in S. Louisiana and it does not get that cold here.

Batteries, especially old ones, can get weak just from sitting, even in when it's not cold. They have some water in them that helps ensure a good connection between the internal plates. If yours has a pop cap on it you may want to check it. Obviously being very careful about the whole acid thing.

My brakes feel spongy. Could this be because the car sat up for so long?
-Should I just bleed them? I have had the ABS light on for 4 years. I heard I should replace ALL the brake fluid with FORD DOT 3 and the light may go off.

The ABS light and Brake warning light tend to come on if brake fluid is low, I would start there. Air/water may have entered the system but I would save those checks for after the simple fluid level check.

My radio loses its memory after about 8 hours, maybe the in dash clock too, did not notice though.
-Possibly a bad RE-connection? Or is it possible the starting prob has something in common with it.

If it is after sitting for 8 hours I would say the battery is bad. But if the battery was so weak it couldn't hold stero memory I wouldn't think you would be able to start the vehicle. I would work on the battery issue first and then move on to the other electrical issuses.

You can try reprogramming the remote since everything was probably disconnected and erased.

Under the drivers seat and carpet is a button, put the key in the ignition and turn it to on then pull the key back out, then you'll hear beeps push the lock button on the remote and you're done