Bangkok Z Posted November 26, 2010 Share Posted November 26, 2010 O.k so I had a Pertronics igniter put on my 240z without the dash or gauges in the car and it fired up fine a few months back but when i reinstalled the dash back in with the stock gauges hooked up i notice it wont start (no spark)but cranks. But when i unplugged the speedo wiring connectors behind the dash(where harness connects to speedo) it fires right up.Anyone running a pertronics igniter can help with wiring or problem? Its a 70 240Z and i am running a ballast resister with the pertronic with a after market coil. Thanks in advance Quote Link to comment Share on other sites More sharing options...
bjhines Posted December 9, 2010 Share Posted December 9, 2010 (edited) Hmmmmmm. Ignition runs through the Tach. You might re-seat your tach wires and see if that fixes the problem. The wire on COIL+ is directly connected to the TACH. The actual IGNITION+ runs to the ballast resistor. The green wire on the resistor runs back to the TACH and out the other side to the coil+. The factory uses a hot coil to allow a strong spark for starting and then the ballast resistor dials it back when running. Your new coil may not need a ballast resistor. In that case you want to connect the two ballast wires/bypass the resistor. The most basic view of the ignition wires is here. That is 44 FEET of wire in total. ... Edited December 9, 2010 by bjhines Quote Link to comment Share on other sites More sharing options...
Bangkok Z Posted December 9, 2010 Author Share Posted December 9, 2010 Hmmmmmm. Ignition runs through the Tach. You might re-seat your tach wires and see if that fixes the problem. K will try that and see if it works. But for some reason I think I have the wiring hooked up wrong at the coil and resistor but again it starts and runs fine until I hook up the tach.Really confused. Thanks will let you know. Quote Link to comment Share on other sites More sharing options...
Bangkok Z Posted December 23, 2010 Author Share Posted December 23, 2010 Thanks you bjhines i have a better understanding with pic. Found out that it was a bad Tach! Special thanks to Rayaapp;) Quote Link to comment Share on other sites More sharing options...
rayaapp2 Posted December 23, 2010 Share Posted December 23, 2010 Here is what I was able to figure out after tracing Kevin's car down. He had a bad 4 wire tach and something grounding the power circuit for the tach in the Fuel gauge. Quote Link to comment Share on other sites More sharing options...
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