Coil pack connection is physical: Coil 1 to Cylinder 1, 2->2, etc.
I am not sure if this is your question, but firing order matches spark to TDC (top dead center) on the power stroke. The design of the crankshaft determines this.
1-3-4-2 is common for most straight 4's. Cylinder 1 is closest to the crank pulley. I believe your coils are 'waste spark' which means it will fire two cylinders at the same time. When the coil fires, one cylinder is on the power stroke and is wanting this spark. The other cylinder is on the exhaust stroke at this time, and thus the spark is 'wasted' on that cylinder. But a cylinder with exhaust gas has high impedance, so most of the energy is delivered to the intended cylinder.
If your question was 'should I just connect 1->1, 2->2, 3->3, 4->4' [ yes!] vs. ' should I try to connect coils following the firing order' [no] then the answer is the first. The trigger wheel determines which coilpack fires when, you just need to hook up the wires number for number.
SOURCE: need a diagram of the firing order of spark plug wires from coil packs to spark plugs
FROM LEFT TO RIGHT, 5/2 3/6 4/1. ASSUMING YOU HAVE THE 3.1L ENGINE.
SOURCE: No spark on my toyota camry. Changed coil pack and
what about wires pull the wires from the plug and make sure u got fire u need to see where ur loosing ur fire if u got it there pull from other end make sure u got fire off of coli pack its either or
SOURCE: My 1999 Toyota Tacoma recently started being sluggish
what plugs did you use, denso i hope. is the firing order correct?
SOURCE: Wiring diagram to add trailer connectionTrailer
http://www.youtube.com/watch?v=EgajKpMgZpE
He installs it in the video.
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