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No Spark

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Trying to reassemble my 260Z installed a Crane XR 700 ignition and PS 20 coil using OEM ballast resistor the car will crank but not start. Earlier with the stock coil I had a weak spark but nothing to the plugs now nothing. Connected red wire to + yellow to - and black is secured to the coil bracket. The LED flashes when I crank so that part is correct but I still have two wires off the ballast resistor. What I need to know is which wire goes where because I tried several now this car ran before and we were about to do a V8 transplant so we took everything out of the engine bay. That plan fell through and now after several months I am trying to remember where everything plugs in. For some reason my spark was not getting to the plugs even when it was weak. I am trying to get a photo of a stock 260Z engine bay showing the coil and resistor wiring I must be overlooking something simple.

1 hour ago, AZ desert monkey said:

Trying to reassemble my 260Z installed a Crane XR 700 ignition and PS 20 coil using OEM ballast resistor the car will crank but not start. Earlier with the stock coil I had a weak spark but nothing to the plugs now nothing. Connected red wire to + yellow to - and black is secured to the coil bracket. The LED flashes when I crank so that part is correct but I still have two wires off the ballast resistor. What I need to know is which wire goes where because I tried several now this car ran before 

Willy-nilly wire connecting will damage parts.  Hope you didn't damage the XR700 box.  Red positive, yellow negative is a positive ground application according to the instructions.  You're hooked up backward.  Our cars are negative ground.

I would get a meter and read the instructions (attached).  Use the meter to confirm which wires have power when the key is On and which have power when the key is at Start.

http://www.cranecams.com/uploads/instructions/9000-0700_.pdf

XR700.PNG

  • Author

I have black to ground,red to coil+ yellow to coil- a solid blue wire and a yellow w black stripe wire I do have the shop manual on a CD I do have a spark from my coil not very crisp but nothing at the plugs...........................rotor is a approaching 7 oclock for #1 ATDC on the dampner. Plug wire are Taylor cap and rotor are Jap coil is PS 20 what am I missing?

1 hour ago, Zed Head said:

 You're hooked up backward.  Our cars are negative ground.

 

Wrong car.PNG

I should apologize, I didn't understand what Crane was showing in their instructions.  Added a another picture from their manual.  Apparently yellow negative, red positive is how negative ground systems are connected also.

I had an electronic GM HEI module go bad and it produced a spark, but it was a weak orange spark.  Not strong enough to ignite the fuel-air mixture.  Could be that your Crane box has gone bad.

You can see the Run/On, and Start wires in their diagram.  At least get a meter and confirm that you have those wires connected to coil positive.

Basic.PNG

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  • Author

I found my shop manual CD so I have the wire legend for color coding and connections from ballast resistor and I have another Crane module so I will rewire as listed install another XR700 and see what happens. It was running before we ripped it down the shop had her for a year and finally closed down so we had to tow her back and try to figure out what goes where. I still have Crane instruction paperwork so I will try again because the exciter ring inside is being picked up by the photoeye because the LED flashes on the module. Thanks guys

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