Would shortening the wire harness screw anything up??

[TURBOPOWERED68]

i have a spaghetti mess in my engine compartment and would like to remove about two FEET of extra harness that is just rolled up and looking very ugly.
Also while i am at it id like to remove any extra junk that is not being used and wire in some things that i can use.
id like to
1-Feed the MAP sensor 5 volts directly from the ECM instead of a jumper from the TPS.
2-can't remember right now.
3-the same as number 2

My main concern is that if i change the length of the harness will it change the value of the readings it gets from the sensors?

Also what would be the way to shorten it up?
Splice a few inches from the ECM plugs then solder each wire back together?
thanks guys.

 

[TURBOPOWERED68]

Ttt

 

[BlackBandit]

shortening the wires won't effect the readings for the ecu. As far as where to put the splices I would say the best way to do it would be to get a weatherpack pin/plug kit and just cut the ends off of the wires that are too long and put a new plug on them. That way you don't have a splice in the harness to look at everytime there's an electrical gremlin.

 

[TURBOPOWERED68]

thats a good idea
i was also thinking about getting the Caspers pre-wired ECU bulkheads