I had to replace the MAF connection and part of the wires with a new MAF connector w/ leads. I was wondering, can I solder the new wires up to the old wires and then use heatshrink wrap to cover the open wires? Somebody at autozone told me not to solder the wires because the resistance from the solder would mess up the signal to and from the MAF and the computer.

What to do?

 

Don't listen to people at autozone
I don't think the 'resistance' is going to affect the 5v signal being sent to the ECM. All of the 'sensitive' electronics are contained within the MAF.
I'd also recommend using heat shrink tubing instead of tape but, tape is better than nothing at all. (heat shrink tubing can also be aquired at Lowe's in the electrical isle)

 

I did just that to my new connector, no problems from it yet, a year later.

 

oh, and what does mr. autozone genius think about using butt-splices? lmfao, solder it and use heat shrink, IMO the best way