The car will not start by the key but can be bump started.When the key is turned you can here the relay next to the fuses clicking also the unit that is attached to the carb is clicking ,is this unit on the carb stopping the starter motor from turning over
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Check the fuse box for the starter relay, and pull out to check pins for corrosion / bad contact. The fact it start on a bump with the key on leads me to suspect the start / crank position of the electrics. Get a knowledgeable person to run through the crank circuit with a meter, also check the condition of earth straps and starter cables. Could be the ignition switch is faulty?
- to check fuel pump/relay- with drivers door open - radio off - insert key and turn from OFF to RUN-not start- should hear a hum from under car back towards tank- relay is under hood in second fuse/relay panel ? did you hit a bump just before car shut off? - if so look in manual for location of EMERGENY FUEL CUTOFF- usually in trunk area- large red push button- can trip sometimes with a hard enough jolt
Most of the time the fan relay is bad. You can bump the dash on the passenger side next to the glove box and sometimes that will cause the relay to close and the fan will start. You have to bump it pretty hard. The relay is behind the dash, next to the glove box.
Sounds like a poor electrical connection somewhere. See if there is a relay in the fuse panel associated with these functions. If so, you could replace that. Without schematics for the car it will be tough, but look for wiring that could be damaged or connectors that could be bumped in and around the dash area.
One tricky thing I have found is that sometime a poor or loose ground connection will cause problems like this. The wiring diagrams will identify these as well.
If it is an electrical Fuel Pump, you will hear the pump whirring as soon as you turn the key to "ON". If you can't hear it, the fuel pump is bad. If it is a mechanical fuel pump on the engine, remove the hose that goes into the carburator. And crank the engine. It should pump the gas out without a problem. If it does not, the fuel pump is bad. Also check the relay to the fuel pump and the shutoff valve. It is more likely that it is a relay problem since it hits a bump and goes off then it carries a current again. Probably a bad relay under the hood for the fuel system.