Question about Volkswagen Golf
You're right. knock sensor will not prevent starting. even if it failed on, it would only change timing a bit--not enough to prevent start. If you don't have fuel on the plugs, listen for the pump to come on when you turn the key to run. For additional troubleshooting steps, please see my post at http://www.fixya.com/cars/r5821173-doesnt_car_start_gasoline_engines
Focus first on the fuel.
If you have more questions, please let me know
Posted on Oct 05, 2010
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Posted on Jan 02, 2017
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But first, you need to ensure you have good spark. Make a spark tester by gapping an old spark plug to 0.200" and sticking it on a plug wire. Lay it on a metal ground and crank the engine over and see if there is spark. If no spark, then the problem may lie in the ignition system.
Check for battery voltage at the positive side (15) of the coil with the key on. If there is no voltage check the yellow wire from the ignition switch. If there is power there you have a break in the wire somewhere in between.
If you have power to the coil, stick your spark tester in the end of the coil wire.
Then, with the key on, hook a jumper wire to the negative (1) side of the coil and MOMENTARILY ground it. If you get a spark, then the Hall Effect sensor in the distributor is either bad or not getting power.
At this point I would recommend getting a Car Service Manual from the reference section of your local public library. It has a more detailed testing procedure for the testing the Hall Effect sensor and ignition module. It is much too long for me to describe here in this forum.
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