Originally Posted by rfors777
I would replace it first. If it turns out that it is not the cause of the issue, you are saving yourself a lot of problems in the very near future anyway. I went to O'Reilly's here in Texas and they had a battery that worked perfect. I believe it was $89.00. It solved a host of weird electrical issues I was having.
Listen to this guy! I got a battery at O'Reilly's for $89 last year just because mine was four years old and I didn't want any problems.
The next thing would be the CPS. They can fail going down the road.
The RCM fails in several ways. The most common is that a solder connection breaks and you can't START the car (this is a connection concerned with the starter). It is rare to hear that a connection breaks and the car stalls (I'd assume this is a connection concerned with the fuel pump, can happen, does happen, but is rare).
There IS a chance that it is none of these items, but it is a slim chance. And anyway, the battery is a limited life part as is (as far as we can tell) the CPS - so replacing them is not a waste even if it does not fix THIS problem. But I bet one of the two WILL fix this for you.