Ignition question, No longer thinking ignition.... Options

[1bwilson]

So I lend my jeep to a friend for a few weeks and go to drive the celica and find it running rough. After a bit of investigation Ive found the im getting a very small amount of spark from wire #4. So I did the usual swap plugs, new wires, new cap, new rotor...... Nothing, still a weak spark. So weak infact that its not even igniting fuel. Im not excited about the possibility of a pinched wire somewhere in the harness and im even less excited about the idea that I may have to hunt it down. So before I start pulling things apart let me go over what I know it isnt and hopefully someone will see light where I cannot.

out of the 3 mains (fuel,spark and air) Ive already figured out its the spark.

Its only happening on the #4 wire

Its not the plug, wire, distro cap, rotor as I have replaced them all.

I AM getting spark but its very weak and at times not there at all.

The old cap had burn/spark marks on the pins accept for the #4 one where it looked almost new.

I cant see any pinched wires but that doesnt mean something has worked itself loose some where out of view.

An option I have is running a MSD 6a ignition (if that would bypass my problem), Ive had one sitting on a shelf for almost 5 years and I have yet to install it. The only problem is I dont know how/which diagram to use for the install.

/discuss

This post has been edited by 1bwilson: Aug 29, 2008 - 7:04 PM

[1bwilson]

Plugs
Wires
Cap
Rotor
Distributer
Looked at wiring and plugs
Checked the seating of the injectors
Drained oil incase bad oil was causing the rings to get gunked
Compression test once, checking again today
Reseated injectors, today Im going to swap the #1 and #4 injector and see if that changes anything