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Showing results for tags 'needle jumping'.
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This morning i decided to swap the ignitor installed on my 240z and after opening the distributor cap i notice something is missing, i guess it could be the ground wire,so i fabricated one with 2 terminals and installed a new pertronix ignitor model 1761 together with a 40511 new 3.0 ohms ignition coil. The car cranked up fine, but whenever you step on the gas the tachometer does not read correctly. Once it reaches to 5,000 RPM it jumps to 7000 goes back to zero, etc. If you have the car parked and step on the pedal it raises to 5,000 goes back to zero. Bottom line it is not Reading as it used to read with the former ignitor. What could be wrong here? Could i have missed something? I have attached pictures of the original 1761 ignitor and the one i just installed which is giving me problems. Your advice is highly appreciated.
