504 no spark
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Thread: 504 no spark

  1. #1
    Fellow Frogger!
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    Default 504 no spark

    Trying to start my 504 since engine has been apart . Have switched +12 volts to +ve of coil with the other terminal connected to points . The system is very basic but I can't see what is wrong . Points are opening and closing as I turn engine over and I presume distributor shaft rotates clockwise . Possibly a coil ? What is best way to test this . Any ideas would be greatly appreciated . It cannot be much . Thanks in advance , Keith

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  2. #2
    Contented Peugeot Driver addo's Avatar
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    Ignition on, plug a lead into the coil and poke the loose end near the engine block. Open and close the points by pushing with a screwdriver. You should get a spark each time they open.

  3. #3
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    I have an in line spark tester that does not pulse but I will try your method tomorrow . Much simpler , Thanks

  4. #4
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    Its just possible that you have the distributor shaft 180 degrees out.
    However the lack of any electrical impulses. Check the connections in the distributor
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  5. #5
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    Did a check for spark as Addo suggested . It has spark but doesn't seem very strong but I might be used to modern ignition systems I think . I checked the timing with a test light and the ignition appears to be retarded by a mile (about 100mm on the crankshaft pulley) . This will be my problem I hope but I will change the coil just to see if that makes a difference to the spark quality . I have not had the car running since I got it so the timing is an unknown

  6. #6
    Contented Peugeot Driver addo's Avatar
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    Are the plugs out one cylinder on the cap? Is the condenser dying?

    Also set your dwell time, not points gap - it's more accurate.

  7. #7
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    The rotor button is pointing roughly at No 1 spark plug lead . I checked this by a test lamp between the coil connection to the points and earth .Light goes out when points open to generate spark . I am not sure about the condenser yet . Once the car starts I can set the dwell . What are the symptoms of a faulty condenser . Can I disconnect it to fault find ? Could the distributor drive gear be one tooth out ?

  8. #8
    1000+ Posts Wildebeest's Avatar
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    Distributor drive shaft could be 180 deg out [half turn].
    Peugeot lesson. No1 cylinder is nearest flywheel.
    True test of No1 cyl on firing stroke is when both valves are closed at TDC.

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