TURBO SWAP DONE, NO START, NO SPARK

[CruzNlife1]

Tried to start it these past two days.... When I turn on the key, the fuel pump cycles and everything, I turn to start, everything turns over like normal.... I'm not getting any spark.... My coil is good, I tried two of them now, Green wire on the coil is hooked up to the solid green wire on the TFI, the red wire on the coil is hooked up to PIN 4 on the LA3 computer.... Motor is turning over, pulled cap the rotor is turning.... Check coil wire with voltmeter and it's good, with the key on, I got 3 volts to the coil plug, than I ran the red wire straight to the battary and got 12 volts.... Hooked it up, still no spark.... Than I tried the Green wire with the black stripe, still no spark but when I let go of the key and it goes back to the on position it sparks once.... I'm using an inline spark checker to check for spark.... I'm not sure whats going on here.... Where should the green wire on the coil be hooked up too.... Does anyone have a diagram of the TFI wiring ?? THanks so much guys....

 

[89lx2.3]

try a new TFI module... sounds like that may be your problem... also I would troubleshoot from the coil in... work on getting a spark there first, then at the dist, wires, plugs, ect... but it sounds like youve tried all the wiring options for the coil and the TFI is a likely problem. good luck!

 

[CruzNlife1]

Wow I'm hearing that it could be a TFI problem from turboford and rangerpowersports.com as well.... I replaced it with a new one from discount auto parts, maybe I should try and put the motorcraft one back in there and see what happens....

 

[CruzNlife1]

also is there any way that I can test the coil with a voltmeter or something, it is used out of the junkyard.... Thanks guys....

 

[SPEED FREAK]

Yes there is as a matter of fact. Set your trusty volt ohm meter to ohms (make sure the coil is not hooked up to anything including the main coil feed wire to the dist) test the impedance across the - and + side of the coil (where the harness plugs into it) the reading should be constant and between .3 and 1 ohm. That will tell you how your primary circuit is doing.
Secondary is testing impedance between the + of the coil and the main coil wire terminal (big silver nubby on top that the coil wire plugs onto). it should be I believe somewhere between 6500 - 15000. or somewhere in there.