i am new here and at wits end i had a shop put a new engine in my 92 b2200 le carb. pick up first off they severely overcharged me but now it backfires . i know it is due to open vacuum lines. it has a rebuilt 2 barrel. guess i am stuck fixin it myself. mazda truckin is not working and i would really like to get the color coded diagram that i know is out there if anyone can email it to me i would forever be grateful. my email is jamesjfrantz@comcast.net THANKShttps://www.mazdaforum.com/forum/images/smilies/eek.gif