Have one of these in the yard with a the big ends gone and a possible cat problem ,on older models like this their is a ignition module and a crank sensor so it has to be one or the other ,the module isnt possible to test as such with right gear but the sensor is ,so disconnect the plug connector and rig up the multimeter across the wires from the sensor and then crank engine ,set multimeter to 10v and see if it produces a voltage when cranking engine if no voltage change it ,the module can be tested as well but on the other end of same connector ,connect an old bulb in a holder and then find the earth side of the two wires with the meter then run a bit of wire from this to earth then the 12v through bulb and touch teh other connection and with the centre lead out of didtributor and hold it close to engine touch the bulb wire to the connection and as you touch the connection it should spasrk if the module is working .
This is almost helpful, but the crazy talk about cats at the beginning, and the eventual confusion in the explanation only frustrated me. If you (Colin) see this response, would you clear up the directions a little. You say to unplug the connector - got it, but then you say to "rig a multimeter across the wires." Do you mean place one prong of the multimeter on each wire? If you could demonstrate on youtube and link it would be awesome.
cat meaning the catalytic converter and the conncetion is made across the wires ,or remove the sensor and put the probes on the two connsctions on the sensor and pass a spanner or similar rapidly over the end and with the multimeter set to the lowest voltage setting you will see a current produced when the spanner is passed over the end of the sensor.Sorry about the confusion as i answer a few questions in the evening after work and iam more often than not tired .
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Could be ignition switch... if you have a distributor then most likely theres no coil.. if there is by chance a coil replace it.. if thats not the problem than take a look at a wiring diagram and locate your ignition switch and test it.. you replaced almost everything that could possibly cause no spark...
Test the voltage to the starter, if there is power but no turn, then it's your starter. If there isn't power, then it's the connection and you need to remedy that.
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NO. ENGINE WILL TURN OVER,BUT WILL NOT START.
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