Fuel Pump Relay

I was having issues with a rough and erratic idle for a long time, and had taken it in to a (good >_>) mechanic to have the supisicious fuel pump checked out (as a prior (bad <_<) mechanic had discovered what he called a 'random low pressure'), only to have the new mechanic find the timing was badly off and rectify that for me. I still have a somewhat rough idle at times, however, although not nearly to the degree I had before.

So my question is this: The fuel pump relay, the two little boxes mounted on the driver's side firewall in my model year of Blazer, has had some wires spliced. The wirenuts on there are the reusuable kind, so I took them off to check out what was going on underneath, and it looks like in the process of (sloppily) stripping the wires for splice, some of the copper strands on each side of the splice have been broken off.

Would this make a difference in the way the fuel pump behaves (or in the reading of the voltage meter in my cab, which remains supsiciously high all the time)? I don't want to have to resplice them unless it would make a difference, since the splices are in bad spots and it would make it kinda difficult to cut down the wires and redo them.


[1992 W series, 4x4 with 118000]